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PoseRAC: Pose Saliency Transformer for Repetitive Action Counting

Here is the official implementation for paper <a href="https://arxiv.org/abs/2303.08450">PoseRAC: Pose Saliency Transformer for Repetitive Action Counting</a>.

Our PoseRAC achieves a substantial improvement over the previous state-of-the-art in performance and speed, even having significantly fewer model parameters, which represented by the sizes of bubbles.

Introduction

This code repo implements PoseRAC, the first pose-level network for Repetitive Action Counting.

Repetitive action counting aims to count the number of repetitive actions in a video, while all current works on this task are video-level, which involves expensive feature extraction and sophisticated video-context interaction. On the other hand, human body pose is the most essential factor in an action, while it has not been well-explored in repetitive action counting task. Based on the motivations above, we propose the first pose-level method called Pose Saliency Transformer for Repetitive Action Counting (PoseRAC).

Meanwhile, the current datasets lack annotations to support pose-level methods, so we propose Pose Saliency Annotation to re-annotate the current best dataset RepCount to obtain the most representative poses for actions. We augment it with pose-level annotations, and create a new version: RepCount-pose, which can be used by all future pose-level methods. We also make such enhancements on UCFRep, but this dataset lacks fine-grained annotations compared to RepCount, and has fewer actions for the healthcare and fitness fields, so we focus on the improvement of the RepCount dataset.

More details about the principles and techniques of our work can be found in the paper. Thanks!

Using Pose Saliency Annotation to train our PoseRAC, we achieve new state-of-the-art performance on RepCount, far outperforming all current methods, with an OBO metric of 0.56 compared to 0.29 of previous state-of-the-art TransRAC! Moreover, PoseRAC has an exaggerated running speed, which takes only 20 minutes to train on a single GPU, and it is even so lightweight to train in only one hour and a half on a CPU, which is unimaginable in previous video-level methods. Our method is also very fast during inference, which is almost 10x faster than the previous state-of-the-art method TransRAC on the average speed per frame.

RepCount-pose: A new version of RepCount dataset with pose-level annotations

We propose a novel Pose Saliency Annotation that addresses the lack of annotations for salient poses in current datasets. As figure below shows, take front raise action as an example, we pre-define two salient poses for each action and annotate the frame indices where these poses occur for all videos in the training set, creating new annotation files for our pose-level method to train on. We apply this approach to RepCount, and create a new annotated version called RepCount-pose.

Download Videos and Pose-level Annotations

this Google Drive link

Code overview

• After preparing the dataset above, the folder structure should look like:

This folder
│   README.md
│   best_weights_PoseRAC.pth
|   train.py
|   eval.py
│   ...

└───RepCount_pose/
│    └───annotation/
│    │	 └───pose_train.csv
│    │	 └───test.csv  
│    │   └───valid.csv 
│    │   └───video_train.csv
│    └───original_data/
│    └───test_poses/
│    └───video/
│    │	 └───test/
│    │	 └───train/
│    │   └───valid/

It is worth mentioning that in the ./RepCount_pose/annotation/ directory, there are two files for training, where pose_train.csv is the annotation applied to our pose-level method, while video_train.csv is applied to the common video-level method. Other than that, there is no difference between our RepCount-pose and RepCount, including videos, test annotations, etc.

Usage

Install

Please refer to INSTALL.md for installation, or you can use:

pip install -r requirement.txt

Evaluation

• [Optional] Obtain the pose for each frame of each test video.
• As all poses of the test videos have been extracted already by us (see the ./RepCount_pose/test_poses/), you can ignore this step! Or you can also try this step, the purpose is only to generate all the data in ./RepCount_pose/test_poses/.

python pre_test.py --config ./RepCount_pose_config.yaml

• Evaluate our PoseRAC with pretrained checkpoint:

python eval.py --config ./RepCount_pose_config.yaml --ckpt ./best_weights_PoseRAC.pth

• Then, you can get the evaluation results:

MAE:0.2356079854110582, OBO:0.5592105263157895

Training

• Preprocessing before training. According to the pose-level annotation, the key frames of each video are determined, and we extract the poses of these frames and get their corresponding classes.

python pre_train.py --config ./RepCount_pose_config.yaml

• Train the model:

python train.py --config ./RepCount_pose_config.yaml

Inference and Visualization

python inference_and_visualization.py --config ./RepCount_pose_config.yaml --ckpt ./best_weights_PoseRAC.pth

You can also train from scratch to get a set of model weights for evaluation and inference.

Contact

Ziyu Yao (yaozy@stu.pku.edu.cn)

If you have any questions or suggestions, don't hesitate to contact us!

Citation

If you are using our code or new version dataset, please consider citing our paper.

@article{yao2023poserac,
  title={PoseRAC: Pose Saliency Transformer for Repetitive Action Counting},
  author={Yao, Ziyu and Cheng, Xuxin and Zou, Yuexian},
  journal={arXiv preprint arXiv:2303.08450},
  year={2023}
}