Welcome to HyperPose’s Documentation!

Installation

C++ Prediction Library Installation

Note that C++ prediction library requires NVIDIA GPU acceleration. HyperPose is developed and frequently tested on Linux platforms (i.e., Ubuntu 18.04). Hence, we recommend you to build HyperPose on Linux.

Build From Source

Prerequisites

Note

Packages of other versions might also work but not tested.

TensorRT Tips

For Linux users, you are highly recommended to install it in a system-wide setting. You can install TensorRT7 via the debian distributions or NVIDIA network repo (CUDA and CuDNN dependency will be automatically installed).

CUDA-CuDNN-TensorRT Compatibility

Different TensorRT version requires specific CUDA and CuDNN version. For specific CUDA and CuDNN requirements of TensorRT7, please refer to this.

Build on Ubuntu 18.04
# >>> Install OpenCV3+ and other dependencies. 
sudo apt -y install cmake libopencv-dev libgflags-dev
# !Note that the APT version OpenCV3.2 on Ubuntu18.04 has some trouble on Cameras Newer version is suggested.
# You are highly recommended to install OpenCV 4+ from scratch also for better performance.

# >>> Install dependencies to run the scripts in `${REPO}/scripts`
sudo apt install python3-dev python3-pip 

# >>> Install CUDA/CuDNN/TensorRT: https://docs.nvidia.com/deeplearning/tensorrt/install-guide/index.html#installing-debian

# >>> Build HyperPose
git clone https://github.com/tensorlayer/hyperpose.git
cd hyperpose
mkdir build && cd build
cmake .. -DCMAKE_BUILD_TYPE=Release && cmake --build .

Build User Codes

You can directly write codes and execute it under the hyperpose repository.

  • Step 1: Write your own codes in hyperpose/examples/user_codes with suffix .cpp.

  • Step 2:

mkdir -p build && cd build
cmake .. -DCMAKE_BUILD_TYPE=Release -DBUILD_USER_CODES=ON   # BUILD_USER_CODES is by default "ON"
cmake --build .

  • Step 3: Execute your codes!

Go to Quick Start to test your installation.

Python Training Library Installation

Configure CUDA environment

You can configure your CUDA either by Anaconda or your system setting.

Using system-wide CUDA toolkits

Users may also directly depend on the system-wide CUDA and CuDNN libraries.

HyperPose have been tested on the environments below:

OS NVIDIA Driver CUDA Toolkit GPU
Ubuntu 18.04 410.79 10.0 Tesla V100-DGX
Ubuntu 18.04 440.33.01 10.2 Tesla V100-DGX
Ubuntu 18.04 430.64 10.1 TITAN RTX
Ubuntu 18.04 430.26 10.2 TITAN XP
Ubuntu 16.04 430.50 10.1 RTX 2080Ti

Check CUDA/CuDNN versions

To test CUDA version, run nvcc --version: the highlight line in the output indicates that you have CUDA 11.2 installed.

nvcc --version
# ========== Valid output looks like ==========
# nvcc: NVIDIA (R) Cuda compiler driver
# Copyright (c) 2005-2020 NVIDIA Corporation
# Built on Mon_Nov_30_19:08:53_PST_2020
# Cuda compilation tools, release 11.2, V11.2.67
# Build cuda_11.2.r11.2/compiler.29373293_0

To check your system-wide CuDNN version on Linux: the output (in the comment) shows that we have CuDNN 8.0.5.

ls /usr/local/cuda/lib64 | grep libcudnn.so
# === Valid output looks like ===
# libcudnn.so
# libcudnn.so.8
# libcudnn.so.8.0.5

Install HyperPose Python training library

Install with pip

To install a stable library from Python Package Index:

pip install -U hyperpose

Or you can install a specific release of hyperpose from GitHub, for example:

export HYPERPOSE_VERSION="2.2.0-alpha"
pip install -U https://github.com/tensorlayer/hyperpose/archive/${HYPERPOSE_VERSION}.zip

More GitHub releases and its version can be found here.

Local installation

You can also install HyperPose by installing the raw GitHub repository, this is usually for developers.

# Install the source codes from GitHub
git clone https://github.com/tensorlayer/hyperpose.git
pip install -U -r hyperpose/requirements.txt

# Add `hyperpose/hyperpose` to `PYTHONPATH` to help python find it.
export HYPERPOSE_PYTHON_HOME=$(pwd)/hyperpose
export PYTHONPATH=$HYPERPOSE_PYTHON_HOME/python:${PYTHONPATH}

Check the installation

Let’s check whether HyperPose is installed by running following commands:

python -c '
import tensorflow as tf             # Test TensorFlow installation
import tensorlayer as tl            # Test TensorLayer installation
assert tf.test.is_gpu_available()   # Test GPU availability
import hyperpose                    # Test HyperPose import
'

Optional Setup

Extra configurations for exporting models

The hypeprose python training library handles the whole pipelines for developing the pose estimation system, including training, evaluating and testing. Its goal is to produce a .npz file that contains the well-trained model weights.

For the training platform, the enviroment configuration above is engough. However, most inference engine accepts ProtoBuf or ONNX format model. For example, the HyperPose C++ inference engine leverages TensorRT as the DNN engine, which takes ONNX models as inputs.

Thus, one need to convert the trained model loaded with .npz file weight to .pb format or .onnx format for further deployment, which need extra configuration below:

Converting a ProtoBuf model

To convert the model into ProtoBuf format, we use @tf.function to decorate the infer function for each model class, and we then can use the get_concrete_function function from tensorflow to consctruct the frozen model computation graph and then save it with ProtoBuf format.

We provide a commandline tool to facilitate the conversion. The prerequisite of this tool is a tensorflow library installed along with HyperPose’s dependency.

Converting a ONNX model

To convert a trained model into ONNX format, we need to first convert the model into ProtoBuf format, we then convert a ProtoBuf model into ONNX format, which requires an additional library: tf2onnx for converting TensorFlow’s ProtoBuf model into ONNX format.

To install tf2onnx, we simply run:

pip install -U tf2onnx
Extra configuration for distributed training with KungFu

The HyperPose python training library can also perform distributed training with Kungfu. To enable parallel training, please install Kungfu according to its official instructon.

Get Started

Quick Start of Prediction Library

Prerequisites

  1. Have HyperPose Inference Library installed (HowTo).

  2. Make sure python3 and python3-pip are installed.

For Linux user, we can simply install them with apt.

sudo apt -y install subversion python3 python3-pip

Warning

HyperPose Inference Library is mostly compatible and tested under Linux, especially Ubuntu 18.04. Please try Ubuntu 18.04 or a docker container for best experience.

Data preparation

Test data

We install a folder called media/ and put it in ${HyperPose_HOME}/data/media/.

# cd to the git repo.
sh scripts/download-test-data.sh

Manual installation

If you have trouble installing the test data through command line, you can manually download the data folder from LINK, and put it in ${HyperPose_HOME}/data/media/.

Install test models

The following scripts will download pre-trained under ${HyperPose_HOME}/data/models/.

# cd to the git repo. And download pre-trained models you want. 

sh scripts/download-openpose-thin-model.sh      # ~20  MB
sh scripts/download-tinyvgg-model.sh            # ~30  MB (UFF model)
sh scripts/download-openpose-res50-model.sh     # ~45  MB
sh scripts/download-openpose-coco-model.sh      # ~200 MB
sh scripts/download-openpose-mobile-model.sh
sh scripts/download-tinyvgg-v2-model.sh
sh scripts/download-openpose-mobile-model.sh
sh scripts/download-openpifpaf-model.sh         # ~98  MB (OpenPifPaf)
sh scripts/download-ppn-res50-model.sh          # ~50  MB (PoseProposal)

Manual installation

You can manually install them from our Model Zoo at GoogleDrive.

Predict a sequence of images

Note for docker users

The following tutorial commands are based on HyperPose commandline tool hyperpose-cli, which is also the entry point of the container (locates in /hyperpose/build/hyperpose-cli). If you are playing with a container, please first get into the container in interactive mode.

# Without imshow/camera functionality
docker run --rm --gpus all -it tensorlayer/hyperpose
# With imshow/camera functionality
xhost +; docker run --rm --gpus all -it -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix --device=/dev/video0:/dev/video0 --entrypoint /bin/bash tensorlayer/hyperpose

# Once get inside the image
cd /hyperpose/build
Using a fast model
# cd to your build directory.

# Predict all images in `../data/media`
./hyperpose-cli --source ../data/media --model ../data/models/lopps-resnet50-V2-HW=368x432.onnx --w 368 --h 432
# The source flag can be ignored as the default value is `../data/media`.

The output images will dumped into the build folder by default. For more models, please look at /hyperpose/data/models. Their name indicates their input tensor shape.

Ignore error message from uff models.

If you are using the TinyVGG-V1-HW=256x384.uff (.uff models are going to be deprecated by TensorRT), you may meet logging messages like ERROR: Tensor image cannot be both input and output. This is harmless and please just ignore it.

Table of flags for hyperpose-cli

Note that the entry point of our official docker image is also hyperpose-cli in the /hyperpose/build folder.

Flag Meaning Default
model Path to your model. ../data/models/TinyVGG-V2-HW=342x368.onnx
source Path to your source.
The source can be a folder path (automatically glob all images), a video path, an image path or the key word camera to open your camera.		 ../data/media/video.avi
post Post-processing methods. This key can be paf or ppn. paf
keep_ratio The DNN takes a fixed input size, where the images must resize to fit that input resolution. However, not hurt the original human scale, we may want to resize by padding. And this is flag enable you to do inference without break original human ratio. (Good for accuracy) true
w The input width of your model. Currently, the trained models we provided all have specific requirements for input resolution. 432 (for the tiny-vgg model)
h The input height of your model. 368 (for the tiny-vgg model)
max_batch_size Maximum batch size for inference engine to execute. 8
runtime Which runtime type to use. This can be operator or stream. If you want to open your camera or producing imshow window, please use operator. For better processing throughput on videos, please use stream. operator
imshow true Whether to open an imshow window.
saving_prefix The output media resource will be named after $(saving_prefix)_$(ID).$(format) "output"
alpha The weight of key point visualization. (from 0 to 1) 0.5
logging Print the internal logging information or not. false

See also

Run ./hyperpose-cli --help for the usage.

Using OpenPose-based (PAF) models
./hyperpose-cli --model ../data/models/openpose-thin-V2-HW=368x432.onnx --w 432 --h 368

./hyperpose-cli --model ../data/models/openpose-coco-V2-HW=368x656.onnx --w 656 --h 368
Use PifPaf model

Set --post flag to pifpaf to enable a PifPaf model processing.

./hyperpose-cli --model ../data/models/openpifpaf-resnet50-HW=368x432.onnx --w 368 --h 432 --post pifpaf
Convert models into TensorRT Engine Protobuf format

You may find that it takes minutes before the prediction really starts. This is because TensorRT will try to profile the model to get a optimized runtime model.

You can pre-compile it in advance, to save the model conversion time.

./example.gen_serialized_engine --model_file ../data/models/openpose-coco-V2-HW=368x656.onnx --input_width 656 --input_height 368 --max_batch_size 16
# You'll get ../data/models/openpose-coco-V2-HW=368x656.onnx.trt
# If you only want to do inference on single images(batch size = 1), please use `--max_batch_size 1` and this will improve the engine's performance.

# Use the converted model to do prediction
./hyperpose-cli --model ../data/models/openpose-coco-V2-HW=368x656.onnx.trt --w 656 --h 368

Caution

Currently, we support models in TensorRT float32 mode. Other data types (e.g., int8) are not supported at this point (welcome to contribute!).

Predict a video using Operator API

./hyperpose-cli --runtime=operator --source=../data/media/video.avi

The output video will be in the build folder.

Predict a video using Stream API (higher throughput)

./hyperpose-cli --runtime=stream --source=../data/media/video.avi
# In stream API, the imshow functionality will be closed.

Play with the camera

./hyperpose-cli --source=camera
# Note that camera mode is not compatible with Stream API. If you want to do inference on your camera in real time, the Operator API is designed for it.

Quick Start of Training Library

Prerequisites

  1. Make sure you have installed HyperPose Python Training Library (HowTo).

  2. If your are using commandline tools, make sure you are executing scripts under the root directory of the project (to directly call train.py and eval.py).

Model training

The training procedure of HypePose is as simple as 3 configuration steps:

  1. choose the pose algorithm

  2. set the model backbone

  3. select target dataset

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from hyperpose import Config, Model, Dataset

# set model name to distinguish different models
Config.set_model_name("MyLightweightOpenPose")

Config.set_model_type(Config.MODEL.LightweightOpenpose)  # set pose algorithm
Config.set_model_backbone(Config.BACKBONE.Vggtiny)       # set model backbone
Config.set_dataset_type(Config.DATA.MSCOCO)              # set target dataset

# use one GPU for training
Config.set_train_type(Config.TRAIN.Single_train)

# configuration is done, get config object and assemble the system
config = Config.get_config()
model = Model.get_model(config)
dataset = Dataset.get_dataset(config)

Model.get_train(config)(model, dataset) # start training!

For each model, HyperPose will save all the related files in the directory: ./save_dir/${MODEL_NAME}, where ${MODEL_NAME} is set in line 4 of above code sample (i.e., “MyLightweightOpenPose”).

The directory regarding training results are listed below:

Directories for training results

Folder Name

Path to what

./save_dir/${MODEL_NAME}/model_dir

Model checkpoints

./save_dir/${MODEL_NAME}/train_vis_dir

Visualized training samples for debugging. See debugging sample figure.

./save_dir/${MODEL_NAME}/eval_vis_dir

Visualized evaluation samples for debugging. See debugging sample figure.

./save_dir/${MODEL_NAME}/test_vis_dir

Visualized testing samples for debugging. See debugging sample figure.

./save_dir/${MODEL_NAME}/data_vis_dir

Visualized annotated dataset samples. See annotated sample figure.

./save_dir/${MODEL_NAME}/log.txt

Training logs (e.g., loss).
_images/train_vis_dir.png

Visualized training/evaluation/testing sample.

_images/data_vis_dir.png

Visualized annotated dataset sample.

We also provide a helpful training commandline tool (train.py) to quickly train pose esitmation models. For detailed usage, please refer to this.

Model evaluation

The evaluate procedure of HyperPose looks quite alike to training one. Given the model name, model checkpoint will be loaded from ./save_dir/${MODEL_NAME}/model_dir/newest_model.npz.

from hyperpose import Config, Model, Dataset

Config.set_model_name("MyLightweightOpenPose")

Config.set_model_type(Config.MODEL.LightweightOpenpose)  # set pose algorithm
Config.set_model_backbone(Config.BACKBONE.Vggtiny)       # set model backbone
Config.set_dataset_type(Config.DATA.MSCOCO)              # set target dataset

# configuration is done, get config object and assemble the system
config=Config.get_config()
model=Model.get_model(config)
dataset=Dataset.get_dataset(config)

Model.get_eval(config)(model, dataset) # start evaluation!

Then the integrated evaluation pipeline will start, the final evaluate metrics will be output at last.

Note

  1. For the same model name, the algorithm, backbone, and dataset type are expected to be the consistent in training and evaluation.

  2. The evaluation metric follows the official evaluation metric of give dataset.

Like the training commandline tool, we also have one for evaluation (eval.py).

Exporting a model

The trained model weight is saved as a NPZ(.npz) file. For further deployment, the weight from NPZ can be coverted into ONNX format.

To export a model trained by HyperPose, please follow these 2 steps:

Step 1: convert the trained NPZ model into ProtoBuf format

We first use the @tf.function decorator to produce the static computation graph and save it into the ProtoBuf format. We already provide a script with cli to facilitate conversion, which located at export_pb.py.

After marking the decorators, we can use export_pb.py to start model conversion.

# FLAGS: --model_type=${ALGORITHM_TYPE} --model_name=${MODEL_NAME} --model_backbone={BACKBONE_TYPE}
python export_pb.py --model_name=MyLightweightOpenpose --model_type=LightweightOpenpose --model_backbone=Vggtiny

Then the ProtoBuf model will be stored at ./save_dir/${MODEL_NAME}/frozen_${MODEL_NAME}.pb.

Step 2: convert the frozen ProtoBuf format model into ONNX format

Note

Make sure you have installed the extra dependencies for exporting models according to training installation.

We use tf2onnx library to convert the ProtoBuf format model into ONNX format. However, to actually convert a model, we need to know its input/output node names.

After running Step 1, we should see output like:

...
Exported graph INPUT nodes: ['x']
Exported graph OUTPUT nodes: ['Identity', 'Identity_1']

In this example, we found the name of input/output nodes, and we need to pass those names as arguments during conversion.

# The input/output names of our example.
export INPUT_NODE_NAME=x
export INPUT_NODE_NAME0=Identity
export INPUT_NODE_NAME1=Identity_1
export OUTPUT_ONNX_MODEL=my_output_model.onnx

python -m tf2onnx.convert --graphdef frozen_${MODEL_NAME}.pb   \
                          --output   ${OUTPUT_ONNX_MODEL}      \
                          --inputs   ${INPUT_NODE_NAME}:0      \
                          --outputs  ${INPUT_NODE_NAME0}:0,${INPUT_NODE_NAME1}:0

We then will see the converted ONNX model named ${OUTPUT_ONNX_MODEL} (‘my_output_model.onnx’ in our example).

Congratulations! now you are able to use the onnx model for Hyperpose prediction library.

Next step

For in-depth usage of HyperPose Training Library, please refer to our training tutorial.

Tutorials

Tutorial for Prediction Library

The prediction library of hyperpose provides 2 APIs styles:

  • Operator API: Imperative style. (more user manipulation space)

  • Stream API: Declarative style. (faster and simpler)

This tutorial will show you how to use them in C++ step by step. For more detailed instructions, please refer to our C++ API documents.

End-2-end Prediction Using Stream API

In this section, we’ll try to process a video via Stream API.

Before all, please make sure you have the library successfully built(See installation). And we encourage you to build the tutorial examples under the folder hyperpose/examples/user_codes.

cd examples/user_codes
touch main.cpp

# Open your editor and do coding.

cd ../..
mkdir -p build && cd build
cmake .. -DCMAKE_BUILD_TYPE=RELEASE -DBUILD_USER_CODES=ON # BUILD_USER_CODES is by default on
cmake --build .

# Execute your codes.
Include the header
#include <hyperpose/hyperpose.hpp>

The file arrangement of include files:

  • hyperpose

    • hyperpose.hpp (include all necessary headers)

    • operator (headers about Operator API)

    • stream (headers about Stream API)

    • utility

Usually, you only need to include hyperpose/hyperpose.hpp.

Prepare Your Model

We support 3 types of model file:

  • Uff: Users need to specify the input/output nodes of the network compute graph.

  • ONNX: No input/output nodes information is required.

  • Cuda Engine Protobuf: When importing Uff / ONNX models, TensorRT will do profiling to build the “best” runtime engine. To save the building time, we can export the model to Cuda Engine Protobuf format and reload it in next execution.

using namespace hyperpose;

// To use a Uff model, users needs to specify the input/output nodes.
// Here, `image` is the input node name, and `outputs/conf` and `outputs/paf` are the output feature maps. (related to the PAF algorithm)
const dnn::uff uff_model{ "../data/models/TinyVGG-V1-HW=256x384.uff", "image", {"outputs/conf", "outputs/paf"} };
Create Input / Output Stream

We support std::vector<cv::Mat>, cv::Mat, cv::VideoCapture as the inputs of input stream.

We also support cv::VideoWriter, NameGenerator(a callable object which generate next name for the output image) as output streams.

// For best performance, HyperPose only allows models who have fixed input network resolution.
// What is "network resolution"? Say that the input of networks are NCHW format, the "HW" is the network resolution.
const cv::Size network_resolution{384, 256};

// * Input video.
auto capture = cv::VideoCapture("../data/media/video.avi");

// * Output video.
auto writer = cv::VideoWriter(
    "output.avi", 
    capture.get(cv::CAP_PROP_FOURCC), capture.get(cv::CAP_PROP_FPS), 
    network_resolution); // Here we use the network resolution as the output video resolution.
Create DNN Engine and Post-processing Parser
// * Create TensorRT engine.
dnn::tensorrt engine(uff_model, network_resolution);

// * post-processing: Using paf.
parser::paf parser{};
Create Stream Scheduler
// * Create stream
auto stream = make_stream(engine, parser);
Connect the Stream
// * Connect input stream.
stream.async() << capture;

// * Connect ouput stream and wait.
stream.sync() >> writer;

  • We provides 2 ways of stream connection.

    • .async()

      • Input Stream: The stream scheduler will push images asynchronously. (not blocked)

      • Output Stream: The stream scheduler will generate results asynchronously. (not blocked)

    • .sync()

      • Input Stream: Blocked. This may cause deadlock if you trying to push a big number of images in a synchronous way(the buffer queue is of fixed size).

      • Output Stream: Blocked until all outputs are generated.

We recommend you to set inputs via async() and generate results via sync().

Full example

Full examples are available here.

Prediction Using Operator API

Preparation
#include <hyperpose/hyperpose.hpp>

int main() {
    using namespace hyperpose;

    const cv::Size network_resolution{384, 256};
    const dnn::uff uff_model{ "../data/models/TinyVGG-V1-HW=256x384.uff", "image", {"outputs/conf", "outputs/paf"} };

    // * Input video.
    auto capture = cv::VideoCapture("../data/media/video.avi");

    // * Output video.
    auto writer = cv::VideoWriter(
        "output.avi", capture.get(cv::CAP_PROP_FOURCC), capture.get(cv::CAP_PROP_FPS), network_resolution);

    // * Create TensorRT engine.
    dnn::tensorrt engine(uff_model, network_resolution);

    // * post-processing: Using paf.
    parser::paf parser{};
    
    while (capture.isOpened()) {
        // ..... Applying pose estimation in one batch. 
    }
}
Apply One Batch of Frames
Accumulate One Batch
std::vector<cv::Mat> batch;

// The .max_batch_size() of dnn::tensorrt is set in the initializer. (by default -> 8)
// initializer(model_config, input_size, max_batch_size = 8, dtype = float, factor = 1./255, flip_rgb = true)
for (int i = 0; i < engine.max_batch_size(); ++i) {
    cv::Mat mat;
    capture >> mat;
    if (mat.empty()) // If the video ends, break.
        break;
    batch.push_back(mat);
}

// Now we got a batch of images. -> batch.
Get Feature/Activation Maps
// * TensorRT Inference.
std::vector<internal_t> feature_map_packets = engine.inference(batch);
// using internal_t = std::vector<feature_map_t>
// Here, feature_map_packets = batch_size * feature_map_count(conf and paf) * feature_map.
Get Human Topology

One image may contain many humans. So the return type is std::vector<human_t>.

// * Paf.
std::vector<std::vector<human_t>> pose_vectors; // image_count * humans
for (auto& packet : feature_map_packets)
    pose_vectors.push_back(parser.process(packet[0]/* conf */, packet[1] /* paf */));
Visualization
// * Visualization
for (size_t i = 0; i < batch.size(); ++i) {
    cv::resize(batch[i], batch[i], network_resolution);
    for (auto&& pose : pose_vectors[i])
        draw_human(batch[i], pose); // Visualization.
    writer << batch[i];
}
Full example

Full examples are available here.

Tutorial for Training Library

Overview

HyperPose Python Training library provides a one-step yet flexible platform for developing pose estimation models.

Based on the intended usage, there are two major categories of user requirements regarding developing a pose estimation system:

  1. Adapting existing algorithms to specific deployment scenarios: e.g., select the pose estimation model architecture with best accuracy conditioned on the limited hardware resources.

  2. Developing customized pose estimation algorithms.: e.g., explore new pose estimation algorithms with the help of existing dataset generation pipeline and model architectures.

To meet these 2 kinds of user requirements, HyperPose provides both rich high-level APIs with integrated pipelines (for the first kind of requirement) and fine-grained APIs with in-depth customisation (for second kind of requirement).

Model/Algorithm/Dataset Supports

5 model algorithm classes
HyperPose preset model algorithms

Algorithm

Class API

Description

OpenPose

Openpose

Original OpenPose algorithm.

Light-weight OpenPose

LightweightOpenpose

A light-weight variant of OpenPose with optimized prediction branch, designed for fast processing.

MobileNet-Thin OpenPose

MobilenetThinOpenpose

A light-weight variant of OpenPose with adapted MobilNet backbone, featured with fast inference.

PoseProposal

Poseproposal

A pose estimation algorithm which models key point detection as object detection with bounding box, featured with fast inference and post-processing.

PifPaf

Pifpaf

An accurate pose esitmation algorithm that generates high resolution confidence map, featured with high accuracy over low resolution images.
10 model backbone classes
HyperPose preset model backbones

Model family

Backbone class APIs

Vgg Backbones

vgg16_backbone, vgg19_backbone, vgg19_backbone

Resnet Backbones

Resnet18_backbone, Resnet18_backbone

Mobilnet Backbones

MobilenetV1_backbone, MobilenetV2_backbone
2 dataset classes
HyperPose preset dataset

Dataset name

Version

Size

COCO

  • COCO 2014 (version published in 2014)

  • COCO 2017 (version published in 2017)

11’827 train images, 5’000 validation images, 40’670 test images

MPII

MPII 2014 (version published in 2014)

25’000 train images, 3’000 validation images, 7’000 test images.
Training Options

  • Parallel Training

  • Backbone Pretraining

  • Domain Adaptation

Extensions

  • Customized dataset

    • User-supplemented dataset

      User may supplement their self-collected data into preset dataset generation pipeline for training and evaluation.

    • User-defined dataset

      User may define their own dataset class to take over the whole dataset generation pipeline.

  • Customized model

    User define thier own model class to take over the model forwarding and loss calculation procedure.

  • Customized pipeline

    User use the provided pre-processors, post-processors and visualizers to assemble their own training or evalution pipeline.

Integrated pipeline

HyperPose integrates training, evaluating and testing pipeline with various High-level APIs for quickly adapting the existing pose estimation algorithms for their customized usage scenarios.

The whole procedure can be devided into two parts:

In the first part, users use the set APIs of the Config module to set up the components of the pipeline. User can set up from the general settings such as algorithm type, network architecture and dataset type, to the detailed settings including training batch size, save interval and learning rate etc.

In the second part, users use the get APIs of the Model module and the Dataset module to assemble the system. After the configuration is finished, user could get a config object containing all the configuration. Pass the config object to the get APIs, users get the configured model, dataset, and the train or evaluate pipeline.

The critical set APIs are below: (necessary)

  • Config.set_model_name

    Receive a string, which is used to uniquely identify the model with a name(string).

    Model name is important as all the files generated during train, evaluate and test procedure of the specific model will be stored at ./save_dir/${MODEL_NAME} directory.

    Precisely, the related paths of the model with name of ${MODEL_NAME} are below:

    Related paths to store files of the specific model.

    Folder Name

    Path to what

    ./save_dir/${MODEL_NAME}/model_dir

    Model checkpoints.

    ./save_dir/${MODEL_NAME}/train_vis_dir

    Directory to save the train visualization images.

    ./save_dir/${MODEL_NAME}/eval_vis_dir

    Directory to save the evaluate visualization images.

    ./save_dir/${MODEL_NAME}/test_vis_dir

    Directory to save the test visualization images.

    ./save_dir/${MODEL_NAME}/data_vis_dir

    Directory to save the dataset label visualization images.

    ./save_dir/${MODEL_NAME}/frozen_${MODEL_NAME}.pb

    The default path to save the exported ProtoBuf format model.

    ./save_dir/${MODEL_NAME}/log.txt

    The default path to save the training logs (e.g., loss).

  • Config.set_model_type

    Receive an Enum value from Config.MODEL , which is used to determine the algorithm type to use.

    Available options are:

    Available options of Config.set_model_type

    Available option

    Description

    Config.MODEL.OpenPose

    OpenPose algorithm

    Config.MODEL.LightweightOpenpose

    Lightweight OpenPose algorithm

    Config.MODEL.MobilnetThinOpenpose

    MobilenetThin OpenPose algorithm

    Conifg.MODEL.Poseproposal

    Pose Proposal Network algorithm

    Config.MODEL.Pifpaf

    Pifpaf algorithm

  • Config.set_model_backbone

    Receive an Enum value from Config.BACKBONE , which is used to determine the network backbone to use.

    Different backbones will result in huge difference of the required computation resources. Each algorithm type has a default model backbone, while HyperPose also provides other backbones for replacement.

    Available options are:

    Available options of Config.set_model_backbone

    Available option

    Description

    Config.BACKBONE.Default

    Use the default backbone of the preset algorithm

    Config.BACKBONE.Vggtiny

    Adapted Vggtiny backbone

    Config.BACKBONE.Vgg16

    Vgg16

    Config.BACKBONE.Vgg19

    Vgg19

    Config.BACKBONE.Resnet18

    Resnet18

    Config.BACKBONE.Resnet50

    Resnet50

    Config.BACKBONE.Mobilenetv1

    Mobilenetv1

    Config.BACKBONE.Mobilenetv2

    Mobilenetv2

  • Config.set_dataset_type

    Receive an Enum value from Config.DATA , which is used to determine the dataset to use.

    Different dataset will result in different train and evalution images and different evaluation metrics.

    Available options are:

    Available options of Config.set_model_backbone

    Available option

    Description

    Config.DATA.COCO

    Mscoco dataset

    Config.DATA.MPII

    MPII dataset

    Config.DATA.USERDEF

    Use user defined dataset.

Use the necessary set APIs above, the basic model and dataset configuration is done, users can get the config object which contains all the configurations using the Config.get_config API:

  • Config.get_config

    Receive nothing, return the config object.

Then user can get the model and dataset object for either train or evaluating using the get APIs.

The critical Get APIs are below:

  • Model.get_model

    Receive the config object and return a configured model object.

    The model object comes from the Tensorlayer.Model class and should have the following functions:

    Functions of the model object

    Function name

    Function utility

    forward

    Input image.

    Return predicted heat map.

    cal_loss

    Input predicted heat map and ground truth heat map.

    Return calcuated loss value.

    save_weights

    Input save path and save format.

    Save the trained model weight.

  • Dataset.get_dataset

    Receive the config object and return a configured dataset object.

    The dataset object should have the following functions:

    Functions of the dataset object

    Function name

    Function utility

    get_parts

    Input nothing.

    Return pre-defined keypoints in the format of an Enum object.

    get_colors

    Input nothing.

    Return pre-defined corresponding colors of keypoints in the format of a list.

    generate_train_data

    Input nothing.

    Return a train image path list and the corresponding target list. Each target in the target list is a dict object with keys of kpt (keypoint), mask (mask of unwanted image area) and bbx (keypoint bounding box)

    generate_eval_data

    Input nothing.

    Return a eval image path list and the corresponding image-id list.

    generate_test_data

    Input nothing.

    Return a test image path list and the corresponding image-id list.

No matter using the train or evaluate pipeline, the above set and get process is always neccesarry to get the specific model and config object.

User can either assemble thier own pipeline use the model and dataset object at hand, or they can use more fine-grained APIs to control the train and evaluate pipeline before use the Config.get_config API, so that they could use the config object to obain preset integrated train and evaluate pipeline for easy development.

How to use the Integrated train and evaluate pipeline are below.

Integrated train pipeline

As mentioned above, the above usage of set and get APIs to get the model and dataset object are always necessary in HyperPose.

To use the integrated train pipeline, the extra configuration APIs provided are below: (Unnecessary for integrated train)

  • Config.set_batch_size

    Receive a integer, which is used as batch size in train procedure.

  • Config.set_learning_rate

    Receive a floating point, which is used as the learning arte in train procedure.

  • Config.set_log_interval

    Receive a integer, which is used as the interval bwteen logging loss information.

  • Config.set_train_type

    Receive an Enum value from Config.TRAIN, which is used to determine the parallel training strategy.

    Available options:

    • Config.TRAIN.Single_train

      Use single GPU for training.

    • Config.TRAIN.Parallel_train

      Use mutiple GPUs for parallel training.(Using Kungfu distributed training library)

  • Config.set_kungfu_option

    Receive an Enum value from Config.KUNGFU, which is used to determine the optimize startegy of parallel training.

    Available options:

    • Config.KUNGFU.Sync_sgd

    • Config.KUNGFU.Sync_avg

    • Config.KUNGFU.Pair_avg

Then we need to use the get API to get the train pipeline from the model module:(necessary for integrated train)

  • Model.get_train

    Receive the config object, return a training function.

    The training function takes the model object and the dataset object and automatically start training.

The basic code to use the integrate training pipeline is below:

# set the train configuartion using 'set' APIs
# import modules of hyperpose
from hyperpose import Config,Model,Dataset
# set model name
Config.set_model_name(args.model_name)
# set model architecture
Config.set_model_type(Config.MODEL.LightweightOpenpose)
# set model backbone
Config.set_model_backbone(Config.BACKBONE.Vggtiny)
# set dataset to use
Config.set_dataset_type(Config.DATA.COCO)
# set training type
Config.set_train_type(Config.TRAIN.Single_train)

# assemble the system using 'get' APIs
# get config object
config=Config.get_config()
# get model object
model=Model.get_model(config)
# get dataset object
dataset=Dataset.get_dataset(config)
# get train pipeline
train=Model.get_train(config)
# train!
train(model,dataset)

To enable the parallel training, install the Kungfu library according to the installation guide, and using the following command when run your program.

# Assuming we have 4 GPUs and train.py is the python script that contain your HyperPose code
CUDA_VISIBLE_DEVICES=0,1,2,3 kungfu-run -np 4 python train.py
Integrated evaluate pipeline

The usage of the integrated evaluate pipeline is similar to the usage pf the integrated training pipeline.

The differences is that we use get APIs to get the evaluate pipeline.

(Remeber, we still need the set and get APIs used to get the model and dataset object as in how we use the integrate train pipeline.)

The API that we use get API to get the evaluate pipeline is below:

  • Model.get_eval

    Receive the config object, return a evaluate function.

    The evaluate function take the model object and the dataset object, and automatically start evaluating.

The basic code to use the integrate evaluate pipeline is below:

# set the evaluate pipeline using 'set' APIs
# import modules of hyperpose
from hyperpose import Config,Model,Dataset
# set model name to be eval
Config.set_model_name(args.model_name)
# set the model architecture and backbone according to the training configuration of the model to be evaluated.
Config.set_model_type(Config.MODEL.LightweightOpenpose)
Config.set_model_backbone(Config.BACKBONE.Vggtiny)
# set dataset to use
Config.set_dataset_type(Config.DATA.MSCOCO)

# assemble the system using 'get' APIs
# get config object
config=Config.get_config()
# get model object
model=Model.get_model(config)
# get dataset object
dataset=Dataset.get_dataset(config)
# get evaluate pipeline
eval=Model.get_eval(config)
# evaluate!
eval(model,dataset)

It should be noticed that:

  • the model architecture, model backbone, dataset type should be the same with the configuration under which model was trained.

  • the model to evaluate will be loaded from the ./save_dir/${MODEL_NAME}/model_dir/newest_model.npz.

  • the evaluation metrics will follow the official evaluation metrics of dataset.

User-defined model architecture

HyperPose leaves freedom for user to define thier own model architecture but use the provided integrated model pipeline at the same time, the following points should be considered:

  • 1.the model should be an object of a tensorlayer.models.Model class (or inherite from this class)

  • 2.the model should have foward and cal_loss functions that has exactly the same input and output format with the preset model architectures. one can refer Model.LightweightOpenpose class for reference.

To do this, user still need to set model_type to determine the training pipeline, here the model_type should be the model that has the similair data processing pipeline with the user’s own model. Then he can use the set_model_arch function to pass his own model object

    Config.set_model_name(your_model_name)
    Config.set_model_type(similiar_ model_type)
    Config.set_model_arch(your_model_arch)

The other configuration procedures are the same with the integrated training pipeline.

User-defined dataset

HyperPose allows user to use their own dataset to be integrated with the training and evaluating pipeline, as long as it has the following attribute and functions:

  • get_train_dataset:

    Return a tensorflow dataset object where each element should be a image path and a serialized dict(using _pickle library to serialize) which at least have the three key-value pairs:

    • “kpt”: a list contains keyspoints for each labeled human, for example:[[kpt1,kpt2,…,kptn],[kpt1,kpt2,…,kptn]] is a list with two labeld humans, where each kpt is a [x,y] coordinate such as [234,526],etc

    • “bbx”: a list contains boundingbox for each labeled human, for example:[bbx1,bbx2] is a list with two labeled humans, where each bbx is a [x,y,w,h] array such as [234,526,60,80], necessary for pose proposal network, could be set to None for others

    • “mask”: a mask (in mscoco polynomial format) used to cover unlabeled people, could be set to None

  • get_eval_dataset:

    Return a tensorflow dataset object where each element should be a image path and its image id.

  • get_input_kpt_cvter(optional):

    Return a function which changes the kpt value in your dataset dict element,used to enable your dataset keypoint annotation being in line with your model keypoint setting, or combined with other dataset with different keypoint annotation.

  • get_output_kpt_cvter(optional):

    Return a function which changes the model predict result to a format that easy to evaluate, used to enable your datatset to be evaluate at a formal COCO standard (using MAP) or MPII standard (using MPCH).

User-defined dataset filter

HyperPose also leave freedom for user to define thier own dataset filter to filter the dataset as they want using set_dataset_filter function.

To use this, a user should know the follow information:

  • HyperPose organize the annotations of one image in one dataset in the similiar meta classes.

    For COCO dataset, it is COCOMeta; For MPII dataset, it is MPIIMeta.

    Meta classes will have some common information such as image_id, joint_list etc, they also have some dataset-specific imformation, such as mask, is_crowd, headbbx_list etc.

  • The dataset_fiter will perform on the Meta objects of the corresponding dataset, if it returns True, the image and annotaions the Meta object related will be kept, otherwise it will be filtered out. Please refer the Dataset.xxxMeta classes for better use.

Please refer Dataset.COCOMeta,Dataset.MPIIMeta classes for better use.

    def my_dataset_filter(coco_meta):
        if(len(coco_meta.joint_list)<5 and (not coco_meta.is_crowd)):
            return True
        else:
            return False
    Config.set_dataset_filter(my_dataset_filter)

User-defined train pipeline

HyperPose also provides three low level functions to help user consturct thier own pipeline. For each class of model, functions of preprocess, postprocess and visualize are provided.

  • Model.get_preprocess Receive an Enum value from Config.MODEL, return a preprocess function.

    The preprocess function is able to convert the annotaion into targets used for training the model.

preprocess=Model.get_preprocess(Config.MODEL.LightweightOPenpose)
conf_map,paf_map=preprocess(annos,img_height,img_width,model_hout,model_wout,Config.DATA.MSCOCO,data_format="channels_first")
pd_conf_map,pd_paf_map=my_model.forward(input_image[np.newaxis,...])
my_model.cal_loss(conf_map,pd_conf_map,paf_map,pd_paf_map)

  • Model.get_postprocess Receive an Enum value from Config.MODEL, return a postprocess function.

    The postprocess function is able to convert the model output into parsed human objects for evaluating and visualizing.

pd_conf_map,pd_paf_map=my_model.forward(input_image[np.newaxis,...])
postprocess=Model.get_postprocess(Config.MODEL.LightweightOpenpose)
pd_humans=postprocess(pd_conf_map,pd_paf_map,dataset_type,data_format="channels_first")
for pd_human in pd_humans:
    pd_human.draw(input_image)

  • get_visualize Receive an Enum value from Config.MODEL, return a visualize function.

    The visualize function is able visualize model’s ouput feature map.

pd_conf_map,pd_paf_map=my_model.forward(input_image[np.newaxis,...])
visualize=Model.get_visualize(Config.MODEL.LightweightOpenpose)
visualize(input_image,pd_conf_map,pd_paf_map,save_name="my_visual",save_dir="./vis_dir")

API Reference

C++ Prediction API

Python Training API

hyperpose package

Subpackages
hyperpose.Config package
Submodules
hyperpose.Config.config_lopps module
hyperpose.Config.config_mbtopps module
hyperpose.Config.config_opps module
hyperpose.Config.config_ppn module
hyperpose.Config.define module
class hyperpose.Config.define.BACKBONE(value)

Bases: enum.Enum

An enumeration.

Default = 0
Mobilenetv1 = 1
Mobilenetv2 = 6
Resnet18 = 3
Resnet50 = 4
Vgg16 = 7
Vgg19 = 2
Vggtiny = 5
class hyperpose.Config.define.DATA(value)

Bases: enum.Enum

An enumeration.

MPII = 1
MSCOCO = 0
MULTIPLE = 3
USERDEF = 2
class hyperpose.Config.define.KUNGFU(value)

Bases: enum.Enum

An enumeration.

Pair_avg = 2
Sync_avg = 1
Sync_sgd = 0
class hyperpose.Config.define.MODEL(value)

Bases: enum.Enum

An enumeration.

LightweightOpenpose = 1
MobilenetThinOpenpose = 3
Openpose = 0
Pifpaf = 4
PoseProposal = 2
class hyperpose.Config.define.OPTIM(value)

Bases: enum.Enum

An enumeration.

Adam = 0
RMSprop = 1
SGD = 2
class hyperpose.Config.define.TRAIN(value)

Bases: enum.Enum

An enumeration.

Parallel_train = 1
Single_train = 0
Module contents
hyperpose.Config.get_config()

get the config object with all the configuration information

get the config object based on the previous setting functions, the config object will be passed to the functions of Model and Dataset module to construct the system.

only the setting functions called before this get_config function is valid, thus use this function after all configuration done.

Parameters
None
Returns
config object

an edict object contains all the configuration information.

hyperpose.Config.set_batch_size(batch_size)

set the batch size in training

Parameters
arg1int

batch_size

Returns
None
hyperpose.Config.set_data_format(data_format)

set model dataformat

set the channel order of current model:

“channels_first” dataformat is faster in deployment
“channels_last” dataformat is more common the integrated pipeline will automaticly adapt to the chosen data format
Parameters
arg1string

available input:

| ‘channels_first’: data_shape N*C*H*W
| ‘channels_last’: data_shape N*H*W*C
Returns
None
hyperpose.Config.set_dataset_filter(dataset_filter)

set the user defined dataset filter

set the dataset filter as the input function. to uniformly format different dataset, Hyperpose organize the annotations of one image in one dataset in the similiar meta classes. for COCO dataset, it is COCOMeta; for MPII dataset, it is MPIIMeta. Meta classes will have some common information such as image_id, joint_list etc, they also have some dataset-specific imformation, such as mask, is_crowd, headbbx_list etc.

the dataset_fiter will perform on the Meta objects of the corresponding dataset, if it returns True, the image and annotaions the Meta object related will be kept, otherwise it will be filtered out. Please refer the Dataset.xxxMeta classes for better use.

Parameters
arg1function

a function receive a meta object as input, return a bool value indicates whether the meta should be kept or filtered out. return Ture for keeping and False for depricating the object. default: None

Returns
None
hyperpose.Config.set_dataset_path(dataset_path)

set the path of the dataset

set the path of the directory where dataset is,if the dataset doesn’t exist in this directory, then it will be automaticly download in this directory and decoded.

Parameters
arg1String

a string indicates the path of the dataset, default: ./data

Returns
None
hyperpose.Config.set_dataset_type(dataset_type)

set the dataset for train and evaluate

set which dataset to use, the process of downlaoding, decoding, reformatting of different type of dataset is automatic. the evaluation metric of different dataset follows their official metric, for COCO is MAP, for MPII is MPCH.

This API also receive user-defined dataset class, which should implement the following functions

__init__: take the config object with all configuration to init the dataset
get_parts: return a enum class which defines the key point definition of the dataset
get_limbs: return a [2*num_limbs] array which defines the limb definition of the dataset
get_colors: return a list which defines the visualization color of the limbs
get_train_dataset: return a tensorflow dataset which contains elements for training. each element should contains an image path and a target dict decoded in bytes by _pickle
get_eval_dataset: return a tensorflow dataset which contains elements for evaluating. each element should contains an image path and an image id
official_eval: if want to evaluate on this user-defined dataset, evalutation function should be implemented. one can refer the Dataset.mpii_dataset and Dataset.mscoco_dataset for detailed information.
Parameters
arg1Config.DATA

a enum value of enum class Config.DATA or user-defined dataset available options:

| Config.DATA.MSCOCO
| Config.DATA.MPII
| user-defined dataset
Returns
None
hyperpose.Config.set_dataset_version(dataset_version)
hyperpose.Config.set_domainadapt_dataset(domainadapt_train_img_paths, domainadapt_scale_rate=1)
hyperpose.Config.set_kungfu_option(kungfu_option)

set the optimizor of parallel training

kungfu distribute training library needs to wrap tensorflow optimizor in kungfu optimizor, this function is to choose kungfu optimizor wrap type

Parameters
arg1Config.KUNGFU

a enum value of enum class Config.KUNGFU available options:

| Config.KUNGFU.Sync_sgd (SynchronousSGDOptimizer, hyper-parameter-robus)
| Config.KUNGFU.Sync_avg (SynchronousAveragingOptimizer)
| Config.KUNGFU.Pair_avg (PairAveragingOptimizer, communication-efficient)
Returns
None
hyperpose.Config.set_learning_rate(learning_rate)

set the learning rate in training

Parameters
arg1float

learning rate

Returns
None
hyperpose.Config.set_log_interval(log_interval)

set the frequency of logging

set the how many iteration intervals between two log information

Parameters
arg1Int

a int value indicates the iteration number bwteen two logs default: 1

Returns
None
hyperpose.Config.set_model_arch(model_arch)

set user defined model architecture

replace default model architecture with user-defined model architecture, use it in the following training and evaluation

Parameters
arg1tensorlayer.models.MODEL

An object of a model class inherit from tensorlayer.models.MODEL class, should implement forward function and cal_loss function to make it compatible with the existing pipeline

The forward funtion should follow the signature below:

| openpose models: def forward(self,x,is_train=False) ,return conf_map,paf_map,stage_confs,stage_pafs
| poseproposal models: def forward(self,x,is_train=False), return pc,pi,px,py,pw,ph,pe

The cal_loss function should follow the signature below:

| openpose models: def cal_loss(self,stage_confs,stage_pafs,gt_conf,gt_paf,mask), return loss,loss_confs,loss_pafs
| poseproposal models: def cal_loss(self,tc,tx,ty,tw,th,te,te_mask,pc,pi,px,py,pw,ph,pe):

return loss_rsp,loss_iou,loss_coor,loss_size,loss_limb

Returns
None
hyperpose.Config.set_model_backbone(model_backbone)

set preset model backbones

set current model backbone to other common backbones different backbones have different computation complexity this enable dynamicly adapt the model architecture to approriate size.

Parameters
arg1Config.BACKBONE

a enum value of enum class Config.BACKBONE available options:

| Config.BACKBONE.DEFUALT (default backbone of the architecture)
| Config.BACKBONE.MobilenetV1
| Config.BACKBONE.MobilenetV2
| Config.BACKBONE.Vggtiny
| Config.BACKBONE.Vgg16
| Config.BACKBONE.Vgg19
| Config.BACKBONE.Resnet18
| Config.BACKBONE.Resnet50
Returns
None
hyperpose.Config.set_model_limbs(userdef_limbs)
hyperpose.Config.set_model_name(model_name)

set the name of model

the models are distinguished by their names,so it is necessary to set model’s name when train multiple models at the same time. each model’s ckpt data and log are saved on the ‘save_dir/model_name’ directory, the following directory are determined:

directory to save model ./save_dir/model_name/model_dir
directory to save train result ./save_dir/model_name/train_vis_dir
directory to save evaluate result ./save_dir/model_name/eval_vis_dir
directory to save dataset visualize result ./save_dir/model_name/data_vis_dir
file path to save train log ./save_dir/model_name/log.txt
Parameters
arg1string

name of the model

Returns
None
hyperpose.Config.set_model_parts(userdef_parts)
hyperpose.Config.set_model_type(model_type)

set preset model architecture

configure the model architecture as one of the desired preset model architectures

Parameters
arg1Config.MODEL

a enum value of enum class Config.MODEL, available options:

| Config.MODEL.Openpose (original Openpose)
| Config.MODEL.LightweightOpenpose (lightweight variant version of Openpose,real-time on cpu)
| Config.MODEL.PoseProposal (pose proposal network)
| Config.MODEL.MobilenetThinOpenpose (lightweight variant version of openpose)
Returns
None
hyperpose.Config.set_multiple_dataset(multiple_dataset_configs)
hyperpose.Config.set_official_dataset(official_flag)
hyperpose.Config.set_optim_type(optim_type)
hyperpose.Config.set_pretrain(enable)
hyperpose.Config.set_pretrain_dataset_path(pretrain_dataset_path)
hyperpose.Config.set_save_interval(save_interval)
hyperpose.Config.set_train_type(train_type)

set single_train or parallel train

default using single train, which train the model on one GPU. set parallel train will use Kungfu library to accelerate training on multiple GPU.

to use parallel train better, it is also allow to set parallel training optimizor by set_kungfu_option.

Parameters
arg1Config.TRAIN

a enum value of enum class Config.TRAIN,available options:

| Config.TRAIN.Single_train
| Config.TRAIN.Parallel_train
Returns
None
hyperpose.Config.set_useradd_data(useradd_train_img_paths, useradd_train_targets, useradd_scale_rate=1)
hyperpose.Config.set_userdef_dataset(userdef_dataset)
hyperpose.Dataset package
Subpackages
hyperpose.Dataset.mpii_dataset package
Submodules
hyperpose.Dataset.mpii_dataset.dataset module
class hyperpose.Dataset.mpii_dataset.dataset.MPII_dataset(config, input_kpt_cvter=None, output_kpt_cvter=None, dataset_filter=None)

Bases: hyperpose.Dataset.base_dataset.Base_dataset

a dataset class specified for mpii dataset, provides uniform APIs

Methods

get_eval_dataset(self[, in_list])

provide uniform tensorflow dataset for evaluating

get_train_dataset(self[, in_list, …])

provide uniform tensorflow dataset for training

official_eval(self, pd_anns[, eval_dir])

providing official evaluation of MPII dataset

prepare_dataset(self)

download,extract, and reformat the dataset the official dataset is in .mat format, format it into json format automaticly.

visualize(self[, vis_num])

visualize annotations of the train dataset

generate_eval_data

generate_test_data

generate_train_data

get_colors

get_dataset_type

get_eval_datasize

get_input_kpt_cvter

get_output_kpt_cvter

get_parts

get_test_dataset

get_test_datasize

get_train_datasize

official_test

set_dataset_version

set_input_kpt_cvter

set_output_kpt_cvter
generate_eval_data(self)
generate_test_data(self)
generate_train_data(self)
get_colors(self)
get_dataset_type(self)
get_input_kpt_cvter(self)
get_output_kpt_cvter(self)
get_parts(self)
official_eval(self, pd_anns, eval_dir='./eval_dir')

providing official evaluation of MPII dataset

output model metrics of PCHs on mpii evaluation dataset(split automaticly)

Parameters
arg1String

A string path of the json file in the same format of cocoeval annotation file(person_keypoints_val2017.json) which contains predicted results. one can refer the evaluation pipeline of models for generation procedure of this json file.

arg2String

A string path indicates where the result json file which contains MPII PCH metrics of various keypoint saves.

Returns
None
official_test(self, pd_anns, test_dir='./test_dir')
prepare_dataset(self)

download,extract, and reformat the dataset the official dataset is in .mat format, format it into json format automaticly.

Parameters
None
Returns
None
set_input_kpt_cvter(self, input_kpt_cvter)
set_output_kpt_cvter(self, output_kpt_cvter)
visualize(self, vis_num=10)

visualize annotations of the train dataset

visualize the annotation points in the image to help understand and check annotation the visualized image will be saved in the “data_vis_dir” of the corresponding model directory(specified by model name). the visualized annotations are from the train dataset.

Parameters
arg1Int

An integer indicates how many images with their annotations are going to be visualized.

Returns
None
hyperpose.Dataset.mpii_dataset.dataset.init_dataset(config)
hyperpose.Dataset.mpii_dataset.define module
class hyperpose.Dataset.mpii_dataset.define.MpiiPart(value)

Bases: enum.Enum

An enumeration.

Headtop = 9
LAnkle = 5
LElbow = 14
LHip = 3
LKnee = 4
LShoulder = 13
LWrist = 15
Pelvis = 6
RAnkle = 0
RElbow = 11
RHip = 2
RKnee = 1
RShoulder = 12
RWrist = 10
Thorax = 7
UpperNeck = 8
static from_coco(human)
hyperpose.Dataset.mpii_dataset.define.opps_input_converter(mpii_kpts)
hyperpose.Dataset.mpii_dataset.define.opps_output_converter(kpt_list)
hyperpose.Dataset.mpii_dataset.define.ppn_input_converter(coco_kpts)
hyperpose.Dataset.mpii_dataset.define.ppn_output_converter(kpt_list)
hyperpose.Dataset.mpii_dataset.format module
class hyperpose.Dataset.mpii_dataset.format.MPIIMeta(image_path, annos_list)

Bases: object

Methods

to_anns_list
to_anns_list(self)
class hyperpose.Dataset.mpii_dataset.format.PoseInfo(image_dir, annos_path, dataset_filter=None)

Bases: object

Methods

get_center_list

get_headbbx_list

get_image_annos

get_image_id_list

get_image_list

get_kpt_list

get_scale_list
get_center_list(self)
get_headbbx_list(self)
get_image_annos(self)
get_image_id_list(self)
get_image_list(self)
get_kpt_list(self)
get_scale_list(self)
hyperpose.Dataset.mpii_dataset.format.generate_json(mat_path, is_test=False)
hyperpose.Dataset.mpii_dataset.generate module
hyperpose.Dataset.mpii_dataset.generate.generate_eval_data(eval_images_path, eval_annos_path, dataset_filter=None)
hyperpose.Dataset.mpii_dataset.generate.generate_test_data(test_images_path, test_annos_path)
hyperpose.Dataset.mpii_dataset.generate.generate_train_data(train_images_path, train_annos_path, dataset_filter=None, input_kpt_cvter=<function <lambda> at 0x7f6740a9fbf8>)
hyperpose.Dataset.mpii_dataset.prepare module
hyperpose.Dataset.mpii_dataset.prepare.prepare_dataset(dataset_path)
hyperpose.Dataset.mpii_dataset.utils module
hyperpose.Dataset.mpii_dataset.utils.affine_transform(pt, t)
hyperpose.Dataset.mpii_dataset.utils.get_3rd_point(a, b)
hyperpose.Dataset.mpii_dataset.utils.get_affine_transform(center, scale, rot, output_size, shift=array([0.0, 0.0], dtype=float32), inv=0)
hyperpose.Dataset.mpii_dataset.utils.get_dir(src_point, rot_rad)
hyperpose.Dataset.mpii_dataset.visualize module
Module contents
hyperpose.Dataset.mscoco_dataset package
Submodules
hyperpose.Dataset.mscoco_dataset.dataset module
class hyperpose.Dataset.mscoco_dataset.dataset.MSCOCO_dataset(config, input_kpt_cvter=None, output_kpt_cvter=None, dataset_filter=None)

Bases: hyperpose.Dataset.base_dataset.Base_dataset

a dataset class specified for coco dataset, provides uniform APIs

Methods

get_eval_dataset(self[, in_list])

provide uniform tensorflow dataset for evaluating

get_train_dataset(self[, in_list, …])

provide uniform tensorflow dataset for training

official_eval(self, pd_anns[, eval_dir])

providing official evaluation of COCO dataset

prepare_dataset(self)

download,extract, and reformat the dataset the official format is in zip format, extract it into json files and image files.

visualize(self, vis_num)

visualize annotations of the train dataset

generate_eval_data

generate_test_data

generate_train_data

get_colors

get_dataset_type

get_eval_datasize

get_input_kpt_cvter

get_output_kpt_cvter

get_parts

get_test_dataset

get_test_datasize

get_train_datasize

official_test

set_dataset_version

set_input_kpt_cvter

set_output_kpt_cvter
generate_eval_data(self)
generate_test_data(self)
generate_train_data(self)
get_colors(self)
get_dataset_type(self)
get_input_kpt_cvter(self)
get_output_kpt_cvter(self)
get_parts(self)
official_eval(self, pd_anns, eval_dir='./eval_dir')

providing official evaluation of COCO dataset

using pycocotool.cocoeval class to perform official evaluation. output model metrics of MAPs on coco evaluation dataset

Parameters
arg1String

A string path of the json file in the same format of cocoeval annotation file(person_keypoints_val2017.json) which contains predicted results. one can refer the evaluation pipeline of models for generation procedure of this json file.

arg2String

A string path indicates where the json files of filtered intersection part of predict results and ground truth the filtered prediction file is stored in eval_dir/pd_ann.json the filtered ground truth file is stored in eval_dir/gt_ann.json

Returns
None
official_test(self, pd_anns, test_dir='./test_dir')
prepare_dataset(self)

download,extract, and reformat the dataset the official format is in zip format, extract it into json files and image files.

Parameters
None
Returns
None
set_input_kpt_cvter(self, input_kpt_cvter)
set_output_kpt_cvter(self, output_kpt_cvter)
visualize(self, vis_num)

visualize annotations of the train dataset

visualize the annotation points in the image to help understand and check annotation the visualized image will be saved in the “data_vis_dir” of the corresponding model directory(specified by model name). the visualized annotations are from the train dataset.

Parameters
arg1Int

An integer indicates how many images with their annotations are going to be visualized.

Returns
None
hyperpose.Dataset.mscoco_dataset.dataset.init_dataset(config)
hyperpose.Dataset.mscoco_dataset.define module
class hyperpose.Dataset.mscoco_dataset.define.CocoPart(value)

Bases: enum.Enum

An enumeration.

LAnkle = 15
LEar = 3
LElbow = 7
LHip = 11
LKnee = 13
LShoulder = 5
LWrist = 9
Leye = 1
Nose = 0
RAnkle = 16
REar = 4
RElbow = 8
RHip = 12
RKnee = 14
RShoulder = 6
RWrist = 10
Reye = 2
hyperpose.Dataset.mscoco_dataset.define.opps_input_converter(coco_kpts)
hyperpose.Dataset.mscoco_dataset.define.opps_output_converter(kpt_list)
hyperpose.Dataset.mscoco_dataset.define.pifpaf_input_converter(coco_kpts)
hyperpose.Dataset.mscoco_dataset.define.pifpaf_output_converter(kpt_list)
hyperpose.Dataset.mscoco_dataset.define.ppn_input_converter(coco_kpts)
hyperpose.Dataset.mscoco_dataset.define.ppn_output_converter(kpt_list)
hyperpose.Dataset.mscoco_dataset.format module
class hyperpose.Dataset.mscoco_dataset.format.CocoMeta(image_id, img_url, img_meta, kpts_infos, masks, bbxs, is_crowd)

Bases: object

Be used in PoseInfo.

class hyperpose.Dataset.mscoco_dataset.format.PoseInfo(image_base_dir, anno_path, with_mask=True, dataset_filter=None, eval=False)

Bases: object

Use COCO for pose estimation, returns images with people only.

Methods

get_image_annos(self)

Read JSON file, and get and check the image list.

get_bbx_list

get_bbxs

get_image_id_list

get_image_list

get_keypoints

get_kpt_list

get_mask_list

load_images
get_bbx_list(self)
static get_bbxs(annos_info)
get_image_annos(self)

Read JSON file, and get and check the image list. Skip missing images.

get_image_id_list(self)
get_image_list(self)
static get_keypoints(annos_info)
get_kpt_list(self)
get_mask_list(self)
load_images(self)
hyperpose.Dataset.mscoco_dataset.generate module
hyperpose.Dataset.mscoco_dataset.generate.generate_eval_data(val_imgs_path, val_anns_path, dataset_filter=None)
hyperpose.Dataset.mscoco_dataset.generate.generate_test_data(test_imgs_path, test_anns_path)
hyperpose.Dataset.mscoco_dataset.generate.generate_train_data(train_imgs_path, train_anns_path, dataset_filter=None, input_kpt_cvter=<function <lambda> at 0x7f6740ad8950>)
hyperpose.Dataset.mscoco_dataset.prepare module
hyperpose.Dataset.mscoco_dataset.prepare.prepare_dataset(data_path='./data', version='2017', task='person')

Download MSCOCO Dataset. Both 2014 and 2017 dataset have train, validate and test sets, but 2017 version put less data into the validation set (115k train, 5k validate) i.e. has more training data.

Parameters
pathstr

The path that the data is downloaded to, defaults is data/mscoco....

datasetstr

The MSCOCO dataset version, 2014 or 2017.

taskstr

person for pose estimation, caption for image captioning, instance for segmentation.

Returns
train_image_pathstr

Folder path of all training images.

train_ann_pathstr

File path of training annotations.

val_image_pathstr

Folder path of all validating images.

val_ann_pathstr

File path of validating annotations.

test_image_pathstr

Folder path of all testing images.

test_ann_pathNone

File path of testing annotations, but as the test sets of MSCOCO 2014 and 2017 do not have annotation, returns None.

References

Examples

>>> train_im_path, train_ann_path, val_im_path, val_ann_path, _, _ =         ...    tl.files.load_mscoco_dataset('data', '2017')
hyperpose.Dataset.mscoco_dataset.visualize module
Module contents
Submodules
hyperpose.Dataset.common module
hyperpose.Dataset.common.file_log(log_file, msg)
hyperpose.Dataset.common.get_domainadapt_targets(domainadapt_img_paths)
hyperpose.Dataset.common.imread_rgb_float(image_path, data_format='channels_first')
hyperpose.Dataset.common.imwrite_rgb_float(image, image_path, data_format='channels_first')
hyperpose.Dataset.common.unzip(path_to_zip_file, directory_to_extract_to)
hyperpose.Dataset.common.visualize(vis_dir, vis_num, dataset, parts, colors, dataset_name='default')
Module contents
hyperpose.Dataset.enum2dataset(dataset_type)
hyperpose.Dataset.get_dataset(config)

get dataset object based on the config object

consturct and return a dataset object based on the config. No matter what the bottom dataset type is, the APIs of the returned dataset object are uniform, they are the following APIs:

visualize: visualize annotations of the train dataset and save it in “data_vir_dir” get_dataset_type: return the type of the bottom dataset. get_train_dataset: return a uniform tensorflow dataset object for training. get_val_dataset: return a uniform tensorflow dataset object for evaluating. official_eval: perform official evaluation on this dataset.

The construction pipeline of this dataset object is below:

1.check whether the dataset file(official zip or mat) is under data_path, if it isn’t, download it from official website automaticly

2.decode the official dataset file, organize the annotations in corresponding Meta classes, conveniet for processing.

3.based on annotation, split train and evaluat part for furthur use.

if user defined thier own dataset_filter, it will be executed in the train dataset or evaluate dataset generating procedure.

use the APIs of this returned dataset object, the difference of different dataset is minimized.

Parameters
arg1config object

the config object return by Config.get_config() function, which includes all the configuration information.

Returns
dataset

a dataset object with unifrom APIs: visualize, get_dataset_type, get_train_dataset, get_val_dataset,official_eval

hyperpose.Dataset.get_pretrain_dataset(config)
hyperpose.Model package
Subpackages
hyperpose.Model.openpose package
Subpackages
hyperpose.Model.openpose.model package
Submodules
hyperpose.Model.openpose.model.lw_openpose module
hyperpose.Model.openpose.model.lw_openpose.conv_block(n_filter, in_channels, filter_size=3, 3, strides=1, 1, dilation_rate=1, 1, W_init=tensorlayer.initializers.truncated_normal, b_init=tensorlayer.initializers.truncated_normal, padding='SAME', data_format='channels_first')
hyperpose.Model.openpose.model.lw_openpose.dw_conv_block(n_filter, in_channels, filter_size=3, 3, strides=1, 1, dilation_rate=1, 1, W_init=tensorlayer.initializers.truncated_normal, b_init=tensorlayer.initializers.truncated_normal, data_format='channels_first')
hyperpose.Model.openpose.model.lw_openpose.nobn_dw_conv_block(n_filter, in_channels, filter_size=3, 3, strides=1, 1, W_init=tensorlayer.initializers.truncated_normal, b_init=tensorlayer.initializers.truncated_normal, data_format='channels_first')
hyperpose.Model.openpose.model.mbv2_sm_openpose module
hyperpose.Model.openpose.model.mbv2_sm_openpose.conv_block(n_filter=32, in_channels=3, filter_size=3, 3, strides=1, 1, act=tensorflow.nn.relu, padding='SAME', data_format='channels_first')
hyperpose.Model.openpose.model.mbv2_sm_openpose.separable_block(n_filter=32, in_channels=3, filter_size=3, 3, strides=1, 1, act=tensorflow.nn.relu, padding='SAME', data_format='channels_first')
hyperpose.Model.openpose.model.mbv2_th_openpose module
hyperpose.Model.openpose.model.mbv2_th_openpose.conv_block(n_filter=32, in_channels=3, filter_size=3, 3, strides=1, 1, act=tensorflow.nn.relu, padding='SAME', data_format='channels_first')
hyperpose.Model.openpose.model.mbv2_th_openpose.separable_block(n_filter=32, in_channels=3, filter_size=3, 3, strides=1, 1, dilation_rate=1, 1, act=tensorflow.nn.relu, data_format='channels_first')
hyperpose.Model.openpose.model.openpose module
Module contents
Submodules
hyperpose.Model.openpose.define module
class hyperpose.Model.openpose.define.CocoPart(value)

Bases: enum.Enum

An enumeration.

Background = 18
LAnkle = 13
LEar = 17
LElbow = 6
LEye = 15
LHip = 11
LKnee = 12
LShoulder = 5
LWrist = 7
Neck = 1
Nose = 0
RAnkle = 10
REar = 16
RElbow = 3
REye = 14
RHip = 8
RKnee = 9
RShoulder = 2
RWrist = 4
class hyperpose.Model.openpose.define.MpiiPart(value)

Bases: enum.Enum

An enumeration.

Background = 15
Center = 14
Headtop = 0
LAnkle = 13
LElbow = 6
LHip = 11
LKnee = 12
LShoulder = 5
LWrist = 7
Neck = 1
RAnkle = 10
RElbow = 3
RHip = 8
RKnee = 9
RShoulder = 2
RWrist = 4
hyperpose.Model.openpose.define.get_coco_flip_list()
hyperpose.Model.openpose.define.get_mpii_flip_list()
hyperpose.Model.openpose.eval module
hyperpose.Model.openpose.eval.evaluate(model, dataset, config, vis_num=30, total_eval_num=10000, enable_multiscale_search=True)

evaluate pipeline of Openpose class models

input model and dataset, the evaluate pipeline will start automaticly the evaluate pipeline will: 1.loading newest model at path ./save_dir/model_name/model_dir/newest_model.npz 2.perform inference and parsing over the chosen evaluate dataset 3.visualize model output in evaluation in directory ./save_dir/model_name/eval_vis_dir 4.output model metrics by calling dataset.official_eval()

Parameters
arg1tensorlayer.models.MODEL

a preset or user defined model object, obtained by Model.get_model() function

arg2dataset

a constructed dataset object, obtained by Dataset.get_dataset() function

arg3Int

an Integer indicates how many model output should be visualized

arg4Int

an Integer indicates how many images should be evaluated

Returns
None
hyperpose.Model.openpose.eval.infer_one_img(model, post_processor, img, img_id=- 1, enable_multiscale_search=False, is_visual=False, save_dir='./vis_dir')
hyperpose.Model.openpose.eval.test(model, dataset, config, vis_num=30, total_test_num=10000, enable_multiscale_search=True)

evaluate pipeline of Openpose class models

input model and dataset, the evaluate pipeline will start automaticly the evaluate pipeline will: 1.loading newest model at path ./save_dir/model_name/model_dir/newest_model.npz 2.perform inference and parsing over the chosen evaluate dataset 3.visualize model output in evaluation in directory ./save_dir/model_name/eval_vis_dir 4.output model metrics by calling dataset.official_eval()

Parameters
arg1tensorlayer.models.MODEL

a preset or user defined model object, obtained by Model.get_model() function

arg2dataset

a constructed dataset object, obtained by Dataset.get_dataset() function

arg3Int

an Integer indicates how many model output should be visualized

arg4Int

an Integer indicates how many images should be evaluated

Returns
None
hyperpose.Model.openpose.eval.visualize(img, img_id, humans, conf_map, paf_map, save_dir)
hyperpose.Model.openpose.infer module
hyperpose.Model.openpose.train module
hyperpose.Model.openpose.train.get_paramed_map_fn(augmentor, preprocessor, data_format='channels_first')
hyperpose.Model.openpose.train.parallel_train(train_model, dataset, config)

Parallel train pipeline of openpose class models

input model and dataset, the train pipeline will start automaticly the train pipeline will: 1.store and restore ckpt in directory ./save_dir/model_name/model_dir 2.log loss information in directory ./save_dir/model_name/log.txt 3.visualize model output periodly during training in directory ./save_dir/model_name/train_vis_dir the newest model is at path ./save_dir/model_name/model_dir/newest_model.npz

Parameters
arg1tensorlayer.models.MODEL

a preset or user defined model object, obtained by Model.get_model() function

arg2dataset

a constructed dataset object, obtained by Dataset.get_dataset() function

Returns
None
hyperpose.Model.openpose.train.single_train(train_model, dataset, config)

Single train pipeline of Openpose class models

input model and dataset, the train pipeline will start automaticly the train pipeline will: 1.store and restore ckpt in directory ./save_dir/model_name/model_dir 2.log loss information in directory ./save_dir/model_name/log.txt 3.visualize model output periodly during training in directory ./save_dir/model_name/train_vis_dir the newest model is at path ./save_dir/model_name/model_dir/newest_model.npz

Parameters
arg1tensorlayer.models.MODEL

a preset or user defined model object, obtained by Model.get_model() function

arg2dataset

a constructed dataset object, obtained by Dataset.get_dataset() function

Returns
None
hyperpose.Model.openpose.utils module
hyperpose.Model.openpose.utils.cal_vectormap_fast(vectormap, countmap, i, v_start, v_end)
hyperpose.Model.openpose.utils.cal_vectormap_ori(vectormap, countmap, i, v_start, v_end)
hyperpose.Model.openpose.utils.draw_results(images, heats_ground, heats_result, pafs_ground, pafs_result, masks, save_dir, name='', data_format='channels_first')

Save results for debugging.

Parameters
imagesa list of RGB images
heats_grounda list of keypoint heat maps or None
heats_resulta list of keypoint heat maps or None
pafs_grounda list of paf vector maps or None
pafs_resulta list of paf vector maps or None
masksa list of mask for people
hyperpose.Model.openpose.utils.get_colors(dataset_type)
hyperpose.Model.openpose.utils.get_flip_list(dataset_type)
hyperpose.Model.openpose.utils.get_heatmap(annos, height, width, hout, wout, parts, limbs, data_format='channels_first')
hyperpose.Model.openpose.utils.get_limbs(dataset_type)
hyperpose.Model.openpose.utils.get_parts(dataset_type)
hyperpose.Model.openpose.utils.get_vectormap(annos, height, width, hout, wout, parts, limbs, data_format='channels_first')
hyperpose.Model.openpose.utils.postprocess(conf_map, paf_map, img_h, img_w, parts, limbs, data_format='channels_first', colors=None)

postprocess function of openpose class models

take model predicted feature maps, output parsed human objects, each one contains all detected keypoints of the person

Parameters
arg1numpy array

model predicted conf_map, heatmaps of keypoints, shape C*H*W(channels_first) or H*W*C(channels_last)

arg2numpy array

model predicted paf_map, heatmaps of limbs, shape C*H*W(channels_first) or H*W*C(channels_last)

arg3Config.DATA

an enum value of enum class Config.DATA width of the model output, will be the width of the generated maps

arg4string

data format speficied for channel order available input: ‘channels_first’: data_shape C*H*W ‘channels_last’: data_shape H*W*C

Returns
list

contain object of humans,see Model.Human for detail information of Human object

hyperpose.Model.openpose.utils.preprocess(annos, img_height, img_width, model_hout, model_wout, parts, limbs, data_format='channels_first')

preprocess function of openpose class models

take keypoints annotations, image height and width, model input height and width, and dataset type, return the constructed conf_map and paf_map

Parameters
arg1list

a list of annotation, each annotation is a list of keypoints that belongs to a person, each keypoint follows the format (x,y), and x<0 or y<0 if the keypoint is not visible or not annotated. the annotations must from a known dataset_type, other wise the keypoint and limbs order will not be correct.

arg2Int

height of the input image, need this to make use of keypoint annotation

arg3Int

width of the input image, need this to make use of keypoint annotation

arg4Int

height of the model output, will be the height of the generated maps

arg5Int

width of the model output, will be the width of the generated maps

arg6Config.DATA

a enum value of enum class Config.DATA dataset_type where the input annotation list from, because to generate correct conf_map and paf_map, the order of keypoints and limbs should be awared.

arg7string

data format speficied for channel order available input: ‘channels_first’: data_shape C*H*W ‘channels_last’: data_shape H*W*C

Returns
list

including two element conf_map: heatmaps of keypoints, shape C*H*W(channels_first) or H*W*C(channels_last) paf_map: heatmaps of limbs, shape C*H*W(channels_first) or H*W*C(channels_last)

hyperpose.Model.openpose.utils.put_heatmap(heatmap, plane_idx, center, stride, sigma)
hyperpose.Model.openpose.utils.vis_annos(image, annos, save_dir, name='')

Save results for debugging.

Parameters
imagessingle RGB image
annosannotation, list of lists
hyperpose.Model.openpose.utils.visualize(img, conf_map, paf_map, save_name='maps', save_dir='./save_dir/vis_dir', data_format='channels_first', save_tofile=True)

visualize function of openpose class models

take model predict feature maps, output visualized image. the image will be saved at ‘save_dir’/’save_name’_visualize.png

Parameters
arg1numpy array

image

arg2numpy array

model output conf_map, heatmaps of keypoints, shape C*H*W(channels_first) or H*W*C(channels_last)

arg3numpy array

model output paf_map, heatmaps of limbs, shape C*H*W(channels_first) or H*W*C(channels_last)

arg4String

specify output image name to distinguish.

arg5String

specify which directory to save the visualized image.

arg6string

data format speficied for channel order available input: ‘channels_first’: data_shape C*H*W ‘channels_last’: data_shape H*W*C

Returns
None
Module contents
hyperpose.Model.pose_proposal package
Submodules
hyperpose.Model.pose_proposal.define module
class hyperpose.Model.pose_proposal.define.CocoPart(value)

Bases: enum.Enum

An enumeration.

Instance = 1
LAnkle = 13
LEar = 17
LElbow = 6
LEye = 15
LHip = 11
LKnee = 12
LShoulder = 5
LWrist = 7
Nose = 0
RAnkle = 10
REar = 16
RElbow = 3
REye = 14
RHip = 8
RKnee = 9
RShoulder = 2
RWrist = 4
class hyperpose.Model.pose_proposal.define.MpiiPart(value)

Bases: enum.Enum

An enumeration.

Center = 14
Headtop = 0
Instance = 15
LAnkle = 13
LElbow = 6
LHip = 11
LKnee = 12
LShoulder = 5
LWrist = 7
Neck = 1
RAnkle = 10
RElbow = 3
RHip = 8
RKnee = 9
RShoulder = 2
RWrist = 4
hyperpose.Model.pose_proposal.define.get_coco_flip_list()
hyperpose.Model.pose_proposal.define.get_mpii_flip_list()
hyperpose.Model.pose_proposal.eval module
hyperpose.Model.pose_proposal.eval.evaluate(model, dataset, config, vis_num=30, total_eval_num=10000, enable_multiscale_search=False)

evaluate pipeline of poseProposal class models

input model and dataset, the evaluate pipeline will start automaticly the evaluate pipeline will: 1.loading newest model at path ./save_dir/model_name/model_dir/newest_model.npz 2.perform inference and parsing over the chosen evaluate dataset 3.visualize model output in evaluation in directory ./save_dir/model_name/eval_vis_dir 4.output model metrics by calling dataset.official_eval()

Parameters
arg1tensorlayer.models.MODEL

a preset or user defined model object, obtained by Model.get_model() function

arg2dataset

a constructed dataset object, obtained by Dataset.get_dataset() function

arg3Int

an Integer indicates how many model output should be visualized

arg4Int

an Integer indicates how many images should be evaluated

Returns
None
hyperpose.Model.pose_proposal.eval.infer_one_img(model, postprocessor, img, img_id=- 1, is_visual=False, save_dir='./vis_dir/pose_proposal')
hyperpose.Model.pose_proposal.eval.test(model, dataset, config, vis_num=30, total_test_num=10000, enable_multiscale_search=False)

evaluate pipeline of poseProposal class models

input model and dataset, the evaluate pipeline will start automaticly the evaluate pipeline will: 1.loading newest model at path ./save_dir/model_name/model_dir/newest_model.npz 2.perform inference and parsing over the chosen evaluate dataset 3.visualize model output in evaluation in directory ./save_dir/model_name/eval_vis_dir 4.output model metrics by calling dataset.official_eval()

Parameters
arg1tensorlayer.models.MODEL

a preset or user defined model object, obtained by Model.get_model() function

arg2dataset

a constructed dataset object, obtained by Dataset.get_dataset() function

arg3Int

an Integer indicates how many model output should be visualized

arg4Int

an Integer indicates how many images should be evaluated

Returns
None
hyperpose.Model.pose_proposal.eval.visualize(img, img_id, humans, predicts, hnei, wnei, hout, wout, limbs, save_dir)
hyperpose.Model.pose_proposal.infer module
class hyperpose.Model.pose_proposal.infer.Post_Processor(parts, limbs, colors, thresh_hold=0.3, eps=1e-08, debug=True)

Bases: object

Methods

process
process(self, pc, pi, px, py, pw, ph, pe, scale_w_rate=1, scale_h_rate=1)
hyperpose.Model.pose_proposal.model module
hyperpose.Model.pose_proposal.train module
hyperpose.Model.pose_proposal.train.get_paramed_map_fn(augmentor, preprocessor, data_format='channels_first')
hyperpose.Model.pose_proposal.train.parallel_train(train_model, dataset, config)

Parallel train pipeline of PoseProposal class models

input model and dataset, the train pipeline will start automaticly the train pipeline will: 1.store and restore ckpt in directory ./save_dir/model_name/model_dir 2.log loss information in directory ./save_dir/model_name/log.txt 3.visualize model output periodly during training in directory ./save_dir/model_name/train_vis_dir the newest model is at path ./save_dir/model_name/model_dir/newest_model.npz

Parameters
arg1tensorlayer.models.MODEL

a preset or user defined model object, obtained by Model.get_model() function

arg2dataset

a constructed dataset object, obtained by Dataset.get_dataset() function

Returns
None
hyperpose.Model.pose_proposal.train.regulize_loss(target_model, weight_decay_factor)
hyperpose.Model.pose_proposal.train.single_train(train_model, dataset, config)

Single train pipeline of PoseProposal class models

input model and dataset, the train pipeline will start automaticly the train pipeline will: 1.store and restore ckpt in directory ./save_dir/model_name/model_dir 2.log loss information in directory ./save_dir/model_name/log.txt 3.visualize model output periodly during training in directory ./save_dir/model_name/train_vis_dir the newest model is at path ./save_dir/model_name/model_dir/newest_model.npz

Parameters
arg1tensorlayer.models.MODEL

a preset or user defined model object, obtained by Model.get_model() function

arg2dataset

a constructed dataset object, obtained by Dataset.get_dataset() function

Returns
None
hyperpose.Model.pose_proposal.utils module
hyperpose.Model.pose_proposal.utils.cal_iou(bbx1, bbx2)
hyperpose.Model.pose_proposal.utils.draw_bbx(img, img_pc, rx, ry, rw, rh, threshold=0.7)
hyperpose.Model.pose_proposal.utils.draw_edge(img, img_e, rx, ry, rw, rh, hnei, wnei, hout, wout, limbs, threshold=0.7)
hyperpose.Model.pose_proposal.utils.draw_results(img, predicts, targets, parts, limbs, save_dir, threshold=0.3, name='', is_train=True, data_format='channels_first')
hyperpose.Model.pose_proposal.utils.get_colors(dataset_type)
hyperpose.Model.pose_proposal.utils.get_flip_list(dataset_type)
hyperpose.Model.pose_proposal.utils.get_limbs(dataset_type)
hyperpose.Model.pose_proposal.utils.get_parts(dataset_type)
hyperpose.Model.pose_proposal.utils.get_pose_proposals(kpts_list, bbxs, hin, win, hout, wout, hnei, wnei, parts, limbs, img_mask=None, data_format='channels_first')
hyperpose.Model.pose_proposal.utils.non_maximium_supress(bbxs, scores, thres)
hyperpose.Model.pose_proposal.utils.postprocess(predicts, parts, limbs, data_format='channels_first', colors=None)

postprocess function of poseproposal class models

take model predicted feature maps of delta,tx,ty,tw,th,te,te_mask, output parsed human objects, each one contains all detected keypoints of the person

Parameters
arg1list

a list of model output: delta,tx,ty,tw,th,te,te_mask delta: keypoint confidence feature map, shape [C,H,W](channels_first) or [H,W,C](channels_last) tx: keypoints bbx center x coordinates, divided by gridsize, shape [C,H,W](channels_first) or [H,W,C](channels_last) ty: keypoints bbx center y coordinates, divided by gridsize, shape [C,H,W](channels_first) or [H,W,C](channels_last) tw: keypoints bbxs width w, divided by image width, shape [C,H,W](channels_first) or [H,W,C](channels_last) th: keypoints bbxs height h, divided by image width, shape [C,H,W](channels_first) or [H,W,C](channels_last) te: edge confidence feature map, shape [C,H,W,Hnei,Wnei](channels_first) or [H,W,Hnei,Wnei,C](channels_last) te_mask: mask of edge confidence feature map, used for loss caculation, shape [C,H,W,Hnei,Wnei](channels_first) or [H,W,Hnei,Wnei,C](channels_last)

arg2: Config.DATA

a enum value of enum class Config.DATA dataset_type where the input annotation list from, because to generate correct conf_map and paf_map, the order of keypoints and limbs should be awared.

arg3string

data format speficied for channel order available input: ‘channels_first’: data_shape C*H*W ‘channels_last’: data_shape H*W*C

Returns
list

contain object of humans,see Model.Human for detail information of Human object

hyperpose.Model.pose_proposal.utils.preprocess(annos, bbxs, model_hin, modeL_win, model_hout, model_wout, model_hnei, model_wnei, parts, limbs, data_format='channels_first')

preprocess function of poseproposal class models

take keypoints annotations, bounding boxs annotatiosn, model input height and width, model limbs neighbor area height, model limbs neighbor area width and dataset type return the constructed targets of delta,tx,ty,tw,th,te,te_mask

Parameters
arg1list

a list of keypoint annotations, each annotation is a list of keypoints that belongs to a person, each keypoint follows the format (x,y), and x<0 or y<0 if the keypoint is not visible or not annotated. the annotations must from a known dataset_type, other wise the keypoint and limbs order will not be correct.

arg2list

a list of bounding box annotations, each bounding box is of format [x,y,w,h]

arg3Int

height of the model input

arg4Int

width of the model input

arg5Int

height of the model output

arg6Int

width of the model output

arg7Int

model limbs neighbor area height, determine the neighbor area to macth limbs, see pose propsal paper for detail information

arg8Int

model limbs neighbor area width, determine the neighbor area to macth limbs, see pose propsal paper for detail information

arg9Config.DATA

a enum value of enum class Config.DATA dataset_type where the input annotation list from, because to generate correct conf_map and paf_map, the order of keypoints and limbs should be awared.

arg10string

data format speficied for channel order available input: ‘channels_first’: data_shape C*H*W ‘channels_last’: data_shape H*W*C

Returns
list

including 7 elements delta: keypoint confidence feature map, shape [C,H,W](channels_first) or [H,W,C](channels_last) tx: keypoints bbx center x coordinates, divided by gridsize, shape [C,H,W](channels_first) or [H,W,C](channels_last) ty: keypoints bbx center y coordinates, divided by gridsize, shape [C,H,W](channels_first) or [H,W,C](channels_last) tw: keypoints bbxs width w, divided by image width, shape [C,H,W](channels_first) or [H,W,C](channels_last) th: keypoints bbxs height h, divided by image width, shape [C,H,W](channels_first) or [H,W,C](channels_last) te: edge confidence feature map, shape [C,H,W,Hnei,Wnei](channels_first) or [H,W,Hnei,Wnei,C](channels_last) te_mask: mask of edge confidence feature map, used for loss caculation, shape [C,H,W,Hnei,Wnei](channels_first) or [H,W,Hnei,Wnei,C](channels_last)

hyperpose.Model.pose_proposal.utils.restore_coor(x, y, w, h, win, hin, wout, hout, data_format='channels_first')
hyperpose.Model.pose_proposal.utils.visualize(img, predicts, parts, limbs, save_name='bbxs', save_dir='./save_dir/vis_dir', data_format='channels_first', save_tofile=True)

visualize function of poseproposal class models

take model predicted feature maps of delta,tx,ty,tw,th,te,te_mask, output visualized image. the image will be saved at ‘save_dir’/’save_name’_visualize.png

Parameters
arg1numpy array

image

arg2list

a list of model output: delta,tx,ty,tw,th,te,te_mask delta: keypoint confidence feature map, shape [C,H,W](channels_first) or [H,W,C](channels_last) tx: keypoints bbx center x coordinates, divided by gridsize, shape [C,H,W](channels_first) or [H,W,C](channels_last) ty: keypoints bbx center y coordinates, divided by gridsize, shape [C,H,W](channels_first) or [H,W,C](channels_last) tw: keypoints bbxs width w, divided by image width, shape [C,H,W](channels_first) or [H,W,C](channels_last) th: keypoints bbxs height h, divided by image width, shape [C,H,W](channels_first) or [H,W,C](channels_last) te: edge confidence feature map, shape [C,H,W,Hnei,Wnei](channels_first) or [H,W,Hnei,Wnei,C](channels_last) te_mask: mask of edge confidence feature map, used for loss caculation, shape [C,H,W,Hnei,Wnei](channels_first) or [H,W,Hnei,Wnei,C](channels_last)

arg3: Config.DATA

a enum value of enum class Config.DATA dataset_type where the input annotation list from

arg4String

specify output image name to distinguish.

arg5String

specify which directory to save the visualized image.

arg6string

data format speficied for channel order available input: ‘channels_first’: data_shape C*H*W ‘channels_last’: data_shape H*W*C

Returns
None
Module contents
Submodules
hyperpose.Model.backbones module
hyperpose.Model.common module
class hyperpose.Model.common.MPIIPart(value)

Bases: enum.Enum

An enumeration.

Head = 13
LAnkle = 5
LElbow = 10
LHip = 3
LKnee = 4
LShoulder = 9
LWrist = 11
Neck = 12
RAnkle = 0
RElbow = 7
RHip = 2
RKnee = 1
RShoulder = 8
RWrist = 6
static from_coco(human)
class hyperpose.Model.common.Profiler

Bases: object

Methods

__call__(self, name, duration)

Call self as a function.

report
report(self)
hyperpose.Model.common.draw_humans(npimg, humans)
hyperpose.Model.common.get_op(graph, name)
hyperpose.Model.common.get_optim(optim_type)
hyperpose.Model.common.get_sample_images(w, h)
hyperpose.Model.common.init_log(config)
hyperpose.Model.common.load_graph(model_file)

Load a freezed graph from file.

hyperpose.Model.common.log(msg)
hyperpose.Model.common.measure(f, name=None)
hyperpose.Model.common.pad_image(img, stride, pad_value=0.0)
hyperpose.Model.common.pad_image_shape(img, shape, pad_value=0.0)
hyperpose.Model.common.plot_humans(image, heatMat, pafMat, humans, name)
hyperpose.Model.common.read_imgfile(path, width, height, data_format='channels_last')

Read image file and resize to network input size.

hyperpose.Model.common.regulize_loss(target_model, weight_decay_factor)
hyperpose.Model.common.rename_tensor(x, name)
hyperpose.Model.common.scale_image(image, hin, win, scale_rate=0.95)
hyperpose.Model.common.tf_repeat(tensor, repeats)

Args:

input: A Tensor. 1-D or higher. repeats: A list. Number of repeat for each dimension, length must be the same as the number of dimensions in input

Returns:

A Tensor. Has the same type as input. Has the shape of tensor.shape * repeats

hyperpose.Model.human module
class hyperpose.Model.human.BodyPart(parts, u_idx, part_idx, x, y, score, w=- 1, h=- 1)

Bases: object

part_idx : part index(eg. 0 for nose) x, y: coordinate of body part score : confidence score

Methods

get_part_name

get_x

get_y
get_part_name(self)
get_x(self)
get_y(self)
class hyperpose.Model.human.Human(parts, limbs, colors)

Bases: object

body_parts: list of BodyPart

Methods

bias

draw_human

get_area

get_bbx

get_global_id

get_partnum

get_score

print

scale
bias(self, bias_w, bias_h)
draw_human(self, img)
get_area(self)
get_bbx(self)
get_global_id(self)
get_partnum(self)
get_score(self)
print(self)
scale(self, scale_w, scale_h)
Module contents
hyperpose.Model.get_evaluate(config)

get evaluate pipeline based on config object

construct evaluate pipeline based on the chosen model_type and dataset_type, the evaluation metric fellows the official metrics of the chosen dataset.

the returned evaluate pipeline can be easily used by evaluate(model,dataset), where model is obtained by Model.get_model(), dataset is obtained by Dataset.get_dataset()

the evaluate pipeline will: 1.loading newest model at path ./save_dir/model_name/model_dir/newest_model.npz 2.perform inference and parsing over the chosen evaluate dataset 3.visualize model output in evaluation in directory ./save_dir/model_name/eval_vis_dir 4.output model metrics by calling dataset.official_eval()

Parameters
arg1config object

the config object return by Config.get_config() function, which includes all the configuration information.

Returns
function

a evaluate pipeline function which takes model and dataset as input, and output model metrics

hyperpose.Model.get_model(config)

get model based on config object

construct and return a model based on the configured model_type and model_backbone. each preset model architecture has a default backbone, replace it with chosen common model_backbones allow user to change model computation complexity to adapt to application scene.

Parameters
arg1config object

the config object return by Config.get_config() function, which includes all the configuration information.

Returns
tensorlayer.models.MODEL

a model object inherited from tensorlayer.models.MODEL class, has configured model architecture and chosen model backbone. can be user defined architecture by using Config.set_model_architecture() function.

hyperpose.Model.get_postprocessor(model_type)

get a postprocessor class based on the specified model_type

get the postprocessor class of the specified kind of model to help user directly construct their own evaluate pipeline(rather than using the integrated evaluate pipeline) or infer pipeline(to check the model utility) when in need.

the postprocessor is able to parse the model output feature map and output parsed human objects of Human class, which contains all dectected keypoints.

Parameters
arg1Config.MODEL

a enum value of enum class Config.MODEL

Returns
function

a postprocessor class of the specified kind of model

hyperpose.Model.get_preprocessor(model_type)

get a preprocessor class based on the specified model_type

get the preprocessor class of the specified kind of model to help user directly construct their own train pipeline(rather than using the integrated train pipeline) when in need.

the preprocessor class is able to construct a preprocessor object that could convert the image and annotation to the model output format for training.

Parameters
arg1Config.MODEL

a enum value of enum class Config.MODEL

Returns
class

a preprocessor class of the specified kind of model

hyperpose.Model.get_pretrain(config)
hyperpose.Model.get_test(config)

get test pipeline based on config object

construct test pipeline based on the chosen model_type and dataset_type, the test metric fellows the official metrics of the chosen dataset.

the returned test pipeline can be easily used by test(model,dataset), where model is obtained by Model.get_model(), dataset is obtained by Dataset.get_dataset()

the test pipeline will: 1.loading newest model at path ./save_dir/model_name/model_dir/newest_model.npz 2.perform inference and parsing over the chosen test dataset 3.visualize model output in test in directory ./save_dir/model_name/test_vis_dir 4.output model test result file at path ./save_dir/model_name/test_vis_dir/pd_ann.json 5.the test dataset ground truth is often preserved by the dataset creator, you may need to upload the test result file to the official server to get model test metrics

Parameters
arg1config object

the config object return by Config.get_config() function, which includes all the configuration information.

Returns
function

a test pipeline function which takes model and dataset as input, and output model metrics

hyperpose.Model.get_train(config)

get train pipeline based on config object

construct train pipeline based on the chosen model_type and dataset_type, default is single train pipeline performed on single GPU, can be parallel train pipeline use function Config.set_train_type()

the returned train pipeline can be easily used by train(model,dataset), where model is obtained by Model.get_model(), dataset is obtained by Dataset.get_dataset()

the train pipeline will: 1.store and restore ckpt in directory ./save_dir/model_name/model_dir 2.log loss information in directory ./save_dir/model_name/log.txt 3.visualize model output periodly during training in directory ./save_dir/model_name/train_vis_dir the newest model is at path ./save_dir/model_name/model_dir/newest_model.npz

Parameters
arg1config object

the config object return by Config.get_config() function, which includes all the configuration information.

Returns
function

a train pipeline function which takes model and dataset as input, can be either single train or parallel train pipeline.

hyperpose.Model.get_visualize(model_type)

get visualize function based model_type

get the visualize function of the specified kind of model to help user construct thier own evaluate pipeline rather than using the integrated train or evaluate pipeline directly when in need

the visualize function is able to visualize model’s output feature map, which is helpful for training and evaluation analysis.

Parameters
arg1Config.MODEL

a enum value of enum class Config.MODEL

Returns
function

a visualize function of the specified kind of model

Module contents

Performance and Supports

Supports

Prediction Library

Supported Language

  • C++

Supported DNN Engine & Model Format

  • TensorRT

    • ONNX

    • Uff

    • CUDA Engine Protobuf

Supported Post-Processing Methods

  • Part Association Field(PAF)

  • Pose Proposal Networks

Released Prediction Models

We released the models on Google Drive. .onnx and .uff files are for inference.

Performance of Prediction Library

Result

We compare the prediction performance of HyperPose with OpenPose 1.6 and TF-Pose. We implement the OpenPose algorithms with different configurations in HyperPose.

The test-bed has Ubuntu18.04, 1070Ti GPU, Intel i7 CPU (12 logic cores).

HyperPose Configuration DNN Size Input Size HyperPose Baseline
OpenPose (VGG) 209.3MB 656 x 368 27.32 FPS 8 FPS (OpenPose)
OpenPose (TinyVGG) 34.7 MB 384 x 256 124.925 FPS N/A
OpenPose (MobileNet) 17.9 MB 432 x 368 84.32 FPS 8.5 FPS (TF-Pose)
OpenPose (ResNet18) 45.0 MB 432 x 368 62.52 FPS N/A
OpenPifPaf (ResNet50) 97.6 MB 97 x 129 178.6 FPS 35.3

Environment: System@Ubuntu18.04, GPU@1070Ti, CPU@i7(12 logic cores).

Tested Video Source: Crazy Updown Funk(resolution@640x360, frame_count@7458, source@YouTube)

OpenPose performance is not tested with batch processing as it seems not to be implemented. (see here)

Insights

Overview

Why HyperPose

HyperPose provides:

  • Flexible training

    • Well abstracted APIs (Python) to help you manage the pose estimation pipeline quickly and directly

    • Dataset (COCO, MPII)

    • Pose Estimation Methods

      • Backbones: ResNet, VGG (Tiny/Normal/Thin), Pose Proposal Network, OpenPifPaf.

    • Post-Processing: Part Association Field (PAF), Pose Proposal Networks, PifPaf.

  • Fast Prediction

    • Rich operator APIs for you to do fast DNN inference and post-processing.

    • 2 API styles:

      • Operator API (Imperative): HyperPose provides basic operators to do DNN inference and post processing.

      • Stream API (Declarative): HyperPose provides a streaming processing runtime scheduler where users only need to specify the engine, post-processing methods and input/output streams.

    • Model format supports:

      • Uff.

      • ONNX.

      • Cuda Engine Protobuf.

    • Good performance. (see here)

Prediction Library Design

HyperPose Prediction Pipeline

HyperPose supports prediction pipelines described in the image blow. (Mainly for bottom-up approaches)

Operator API & Stream API

Operator API provides basic operators for users to manipulate the pipeline. And Stream API is based on Operator API and makes higher level scheduling on it.

Minimum Example For Operator API

To apply pose estimation to a video using Operator API:

#include <hyperpose/hyperpose.hpp>

int main() {
    using namespace hyperpose;

    const cv::Size network_resolution{384, 256};
    const dnn::uff uff_model{ "../data/models/TinyVGG-V1-HW=256x384.uff", "image", {"outputs/conf", "outputs/paf"} };

    // * Input video.
    auto capture = cv::VideoCapture("../data/media/video.avi");

    // * Output video.
    auto writer = cv::VideoWriter(
        "output.avi", capture.get(cv::CAP_PROP_FOURCC), capture.get(cv::CAP_PROP_FPS), network_resolution);

    // * Create TensorRT engine.
    dnn::tensorrt engine(uff_model, network_resolution);

    // * post-processing: Using paf.
    parser::paf parser{};

    while (capture.isOpened()) {
        std::vector<cv::Mat> batch;
        for (int i = 0; i < engine.max_batch_size(); ++i) {
            cv::Mat mat;
            capture >> mat;
            if (mat.empty())
                break;
            batch.push_back(mat);
        }

        if (batch.empty())
            break;

        // * TensorRT Inference.
        auto feature_map_packets = engine.inference(batch);

        // * Paf.
        std::vector<std::vector<human_t>> pose_vectors;
        pose_vectors.reserve(feature_map_packets.size());
        for (auto&& packet : feature_map_packets)
            pose_vectors.push_back(parser.process(packet[0], packet[1]));

        // * Visualization
        for (size_t i = 0; i < batch.size(); ++i) {
            cv::resize(batch[i], batch[i], network_resolution);
            for (auto&& pose : pose_vectors[i])
                draw_human(batch[i], pose);
            writer << batch[i];
        }
    }
}
Minimum Example For Stream API

To apply pose estimation to a video using Stream API:

#include <hyperpose/hyperpose.hpp>

int main() {
    using namespace hyperpose;

    const cv::Size network_resolution{384, 256};
    const dnn::uff uff_model{ "../data/models/TinyVGG-V1-HW=256x384.uff", "image", {"outputs/conf", "outputs/paf"} };

    // * Input video.
    auto capture = cv::VideoCapture("../data/media/video.avi");

    // * Output video.
    auto writer = cv::VideoWriter(
        "output.avi", capture.get(cv::CAP_PROP_FOURCC), capture.get(cv::CAP_PROP_FPS), network_resolution);

    // * Create TensorRT engine.
    dnn::tensorrt engine(uff_model, network_resolution);

    // * post-processing: Using paf.
    parser::paf parser{};

    // * Create stream
    auto stream = make_stream(engine, parser);

    // * Connect input stream.
    stream.async() << capture;

    // * Connect ouput stream and wait.
    stream.sync() >> writer;
}

Using the Stream API, it is much faster and with less codes!

Stream Processing in Stream API

  • Every worker is a thread.

  • Every worker communicates via a FIFO queue.

  • The DNN inference worker will do greedy batching for the inputs.

Frequently Asked Questions(FAQs)

Frequently Asked Questions

Installation

No C++17 Compiler(Linux)?

  • Using apt as your package manager?

    • Install from ppa.

    • Helpful link: LINK.

  • Otherwise

    • Build a C++17 compiler from source.

Build without examples/tests?
cmake .. -DBUILD_EXAMPLES=OFF -DBUILD_TESTS=OFF
Build OpenCV from source?

Refer to here.

Network problem when installing the test models/data from the command line?

Download them manually:

Training

Prediction

TensorRT Error?

  • See the tensorrt.log. (it contains more informations about logging and is located in where you execute the binary)

  • You may meet ERROR: Tensor image cannot be both input and output when using the TinyVGG-V1-HW=256x384.uff model. And just ignore it.

Performance?

  • Usually the 1st try of execution(cold start) on small amount of data tends to be slow. You can use a longer video/more images to test the performance(or run it more than once).

  • The performance is mainly related to the followings(you can customize the followings):

    • The complexity of model(not only FLOPS but also parameter numbers): smaller is usually better.

    • The model network resolution(alse see here): smaller is better.

    • Batch size: bigger is faster(higher throughput). (For details, you can refer to Shen’s dissertation)

    • The input / output size(this mainly involves in the speed of cv::resize): smaller is better.

    • The upsampling factor of the feature map when doing post processing: smaller is better. (By default the PAF parser will upsample the feature map by 4x. We did this according to the Lightweight-OpenPose paper.)

  • Use better hardware(Good CPUs can make the post-processing faster!).

  • Use SIMD instructions of your CPU. (Compile OpenCV from source and enable the instruction sets in cmake configuration)