Res2Net for Pose Estimation

Update

[2020.3.13] Res2Net_v1b based Pose Estimation results are released now.

Introduction

This repo uses Simple Baselines as the baseline method for Pose Estimation.

Res2Net is a powerful backbone architecture that can be easily implemented into state-of-the-art models by replacing the bottleneck with Res2Net module. More detail can be found on "Res2Net: A New Multi-scale Backbone Architecture"

Performance

Results on COCO val2017

Arch	Person detector	Input size	AP	Ap .5	AP .75	AP (M)	AP (L)
pose_resnet_50	prdbox	256x192	0.704	0.886	0.783	0.671	0.772
pose_res2net_50	prdbox	256x192	0.715	0.890	0.793	0.682	0.784
pose_resnet_50	GTbox	256x192	0.724	0.915	0.804	0.697	0.765
pose_res2net_50	GTbox	256x192	0.737	0.925	0.814	0.708	0.782
pose_resnet_101	prdbox	256x192	0.714	0.893	0.793	0.681	0.781
pose_res2net_101	prdbox	256x192	0.722	0.894	0.798	0.689	0.792
pose_res2net_101	GTbox	256x192	0.744	0.926	0.826	0.720	0.785
pose_res2net_v1b_50	prdbox	256x192	0.722	0.895	0.797	0.685	0.794
pose_res2net_v1b_50	GTbox	256x192	0.743	0.926	0.816	0.713	0.792
pose_res2net_101	prdbox	256x192	0.730	0.895	0.803	0.695	0.800
pose_res2net_101	GTbox	256x192	0.753	0.926	0.825	0.722	0.801

Note:

Flip test is used.
Person detector: prdbox refers to the Person detector that has person AP of 56.4 on COCO val2017 dataset; GTbox refers to the GT of person detection.

Quick start

Installation

Install pytorch >= v1.0.0
Clone this repo, and we'll call the directory that you cloned as ${POSE_ROOT}.
Install dependencies:
```
pip install -r requirements.txt
```
Make libs:
```
cd ${POSE_ROOT}/lib
make
```

Install COCOAPI:

# COCOAPI=/path/to/clone/cocoapi
git clone https://github.com/cocodataset/cocoapi.git $COCOAPI
cd $COCOAPI/PythonAPI
# Install into global site-packages
make install
# Alternatively, if you do not have permissions or prefer
# not to install the COCO API into global site-packages
python3 setup.py install --user

Note that instructions like # COCOAPI=/path/to/install/cocoapi indicate that you should pick a path where you'd like to have the software cloned and then set an environment variable (COCOAPI in this case) accordingly.

Init output(training model output directory) and log(tensorboard log directory) directory:

mkdir output 
mkdir log

Your directory tree should look like this:

${POSE_ROOT}
├── data
├── experiments
├── lib
├── log
├── models
├── output
├── tools 
├── README.md
└── requirements.txt

Download pretrained models of Res2Net following the instruction from Res2Net backbone pretrained models. Please change the path to pretrained models (PRETRAINED: ) in config files: experiments/coco/res2net/res2net50_4s_26w_256x192_d256x3_adam_lr1e-3.yaml

${POSE_ROOT}
 `-- models
     `-- pytorch
         |-- imagenet
         |   |-- res2net50_26w_4s-06e79181.pth
         |   |-- res2net101_26w_4s-02a759a1.pth
         |   |-- resnet50-19c8e357.pth
         |   |-- resnet101-5d3b4d8f.pth
         |   `-- resnet152-b121ed2d.pth
         |-- pose_coco
         |   |-- (pretrained model for res2net_pose will be soon available)
         |   |-- pose_resnet_101_256x192.pth
         |   |-- pose_resnet_101_384x288.pth
         |   |-- pose_resnet_152_256x192.pth
         |   |-- pose_resnet_152_384x288.pth
         |   |-- pose_resnet_50_256x192.pth
         |   `-- pose_resnet_50_384x288.pth
         `-- pose_mpii
             |-- pose_resnet_101_256x256.pth
             |-- pose_resnet_152_256x256.pth
             `-- pose_resnet_50_256x256.pth

Data preparation

For MPII data, please download from MPII Human Pose Dataset. The original annotation files are in matlab format. We have converted them into json format, you also need to download them from OneDrive or GoogleDrive. Extract them under {POSE_ROOT}/data, and make them look like this:

${POSE_ROOT}
|-- data
`-- |-- mpii
    `-- |-- annot
        |   |-- gt_valid.mat
        |   |-- test.json
        |   |-- train.json
        |   |-- trainval.json
        |   `-- valid.json
        `-- images
            |-- 000001163.jpg
            |-- 000003072.jpg

For COCO data, please download from COCO download, 2017 Train/Val is needed for COCO keypoints training and validation. We also provide person detection result of COCO val2017 and test-dev2017 to reproduce our multi-person pose estimation results. Please download from OneDrive or GoogleDrive. Download and extract them under {POSE_ROOT}/data, and make them look like this:

${POSE_ROOT}
|-- data
`-- |-- coco
    `-- |-- annotations
        |   |-- person_keypoints_train2017.json
        |   `-- person_keypoints_val2017.json
        |-- person_detection_results
        |   |-- COCO_val2017_detections_AP_H_56_person.json
        |   |-- COCO_test-dev2017_detections_AP_H_609_person.json
        `-- images
            |-- train2017
            |   |-- 000000000009.jpg
            |   |-- 000000000025.jpg
            |   |-- 000000000030.jpg
            |   |-- ... 
            `-- val2017
                |-- 000000000139.jpg
                |-- 000000000285.jpg
                |-- 000000000632.jpg
                |-- ...

Training and Testing

Testing on COCO val2017 dataset (pretrained model for res2net_pose will be soon available)

python tools/test.py \
    --cfg experiments/coco/res2net/res2net50_4s_26w_256x192_d256x3_adam_lr1e-3.yaml \
    TEST.MODEL_FILE {path to pretrained model.pth} \
    TEST.USE_GT_BBOX False

Training on COCO train2017 dataset

python tools/train.py \
    --cfg experiments/coco/res2net/res2net50_4s_26w_256x192_d256x3_adam_lr1e-3.yaml

Testing on MPII dataset

python tools/test.py \
    --cfg experiments/mpii/res2net/res2net50_256x256_d256x3_adam_lr1e-3.yaml \
    TEST.MODEL_FILE {path to pretrained model.pth}

Training on MPII dataset

python tools/train.py \
    --cfg experiments/mpii/res2net/res2net50_256x256_d256x3_adam_lr1e-3.yaml

Applications

Other applications such as Classification, Instance segmentation, Object detection, Semantic segmentation, Salient object detection, Class activation map can be found on https://mmcheng.net/res2net/ and https://github.com/gasvn/Res2Net .

Citation

If you find this work or code is helpful in your research, please cite:

@article{gao2019res2net,
  title={Res2Net: A New Multi-scale Backbone Architecture},
  author={Gao, Shang-Hua and Cheng, Ming-Ming and Zhao, Kai and Zhang, Xin-Yu and Yang, Ming-Hsuan and Torr, Philip},
  journal={IEEE TPAMI},
  year={2020},
  doi={10.1109/TPAMI.2019.2938758}, 
}

Acknowledge

The code for pose estimation is partly borrowed from Simple Baselines for Human Pose Estimation and Tracking.

Res2Net / Res2Net-Pose-Estimation