easy_ViTPose

easy_ViTPose

Accurate 2d human and animal pose estimation

Easy to use SOTA ViTPose [Y. Xu et al., 2022] models for fast inference.

We provide all the VitPose original models, converted for inference, with single dataset format output.

In addition to that we also provide a Coco-25 model, trained on the original coco dataset + feet https://cmu-perceptual-computing-lab.github.io/foot_keypoint_dataset/ Finetuning is not currently supported, you can check de43d54cad87404cf0ad4a7b5da6bacf4240248b and previous commits for a working state of train.py

Results

people_out.mp4

zebra_out.mp4

(Credits dance: https://www.youtube.com/watch?v=p-rSdt0aFuw )
(Credits zebras: https://www.youtube.com/watch?v=y-vELRYS8Yk )

Features

• Image / Video / Webcam support
• Video support using SORT algorithm to track bboxes between frames
• Torch / ONNX / Tensorrt inference
• Runs the original VitPose checkpoints from ViTAE-Transformer/ViTPose
• 4 ViTPose architectures with different sizes and performances (s: small, b: base, l: large, h: huge)
• Multi skeleton and dataset: (AIC / MPII / COCO / COCO + FEET / COCO WHOLEBODY / APT36k / AP10k)
• Human / Animal pose estimation
• cpu / gpu / metal support
• show and save images / videos and output to json

We run YOLOv8 for detection, it does not provide complete animal detection. You can finetune a custom yolo model to detect the animal you are interested in, if you do please open an issue, we might want to integrate other models for detection.

Benchmark:

You can expect realtime >30 fps with modern nvidia gpus and apple silicon (using metal!).

Skeleton reference

There are multiple skeletons for different dataset. Check the definition here visualization.py.

Installation and Usage

Important

Install torch>2.0 with cuda / mps support by yourself. also check requirements_gpu.txt.

git clone [email protected]:JunkyByte/easy_ViTPose.git
cd easy_ViTPose/
pip install -e .
pip install -r requirements.txt

Download models

• Download the models from Huggingface We provide torch models for every dataset and architecture.
  If you want to run onnx / tensorrt inference download the appropriate torch ckpt and use export.py to convert it.
  You can use ultralytics yolo export command to export yolo to onnx and tensorrt as well.

Export to onnx and tensorrt

$ python export.py --help
usage: export.py [-h] --model-ckpt MODEL_CKPT --model-name {s,b,l,h} [--output OUTPUT] [--dataset DATASET]

optional arguments:
  -h, --help            show this help message and exit
  --model-ckpt MODEL_CKPT
                        The torch model that shall be used for conversion
  --model-name {s,b,l,h}
                        [s: ViT-S, b: ViT-B, l: ViT-L, h: ViT-H]
  --output OUTPUT       File (without extension) or dir path for checkpoint output
  --dataset DATASET     Name of the dataset. If None it"s extracted from the file name. ["coco", "coco_25",
                        "wholebody", "mpii", "ap10k", "apt36k", "aic"]

Run inference

To run inference from command line you can use the inference.py script as follows:

$ python inference.py --help
usage: inference.py [-h] [--input INPUT] [--output-path OUTPUT_PATH] --model MODEL [--yolo YOLO] [--dataset DATASET]
                    [--det-class DET_CLASS] [--model-name {s,b,l,h}] [--yolo-size YOLO_SIZE]
                    [--conf-threshold CONF_THRESHOLD] [--rotate {0,90,180,270}] [--yolo-step YOLO_STEP]
                    [--single-pose] [--show] [--show-yolo] [--show-raw-yolo] [--save-img] [--save-json]

optional arguments:
  -h, --help            show this help message and exit
  --input INPUT         path to image / video or webcam ID (=cv2)
  --output-path OUTPUT_PATH
                        output path, if the path provided is a directory output files are "input_name
                        +_result{extension}".
  --model MODEL         checkpoint path of the model
  --yolo YOLO           checkpoint path of the yolo model
  --dataset DATASET     Name of the dataset. If None it"s extracted from the file name. ["coco", "coco_25",
                        "wholebody", "mpii", "ap10k", "apt36k", "aic"]
  --det-class DET_CLASS
                        ["human", "cat", "dog", "horse", "sheep", "cow", "elephant", "bear", "zebra", "giraffe",
                        "animals"]
  --model-name {s,b,l,h}
                        [s: ViT-S, b: ViT-B, l: ViT-L, h: ViT-H]
  --yolo-size YOLO_SIZE
                        YOLOv8 image size during inference
  --conf-threshold CONF_THRESHOLD
                        Minimum confidence for keypoints to be drawn. [0, 1] range
  --rotate {0,90,180,270}
                        Rotate the image of [90, 180, 270] degress counterclockwise
  --yolo-step YOLO_STEP
                        The tracker can be used to predict the bboxes instead of yolo for performance, this flag
                        specifies how often yolo is applied (e.g. 1 applies yolo every frame). This does not have any
                        effect when is_video is False
  --single-pose         Do not use SORT tracker because single pose is expected in the video
  --show                preview result during inference
  --show-yolo           draw yolo results
  --show-raw-yolo       draw yolo result before that SORT is applied for tracking (only valid during video inference)
  --save-img            save image results
  --save-json           save json results

You can run inference from code as follows:

import cv2
from easy_ViTPose import VitInference

# Image to run inference RGB format
img = cv2.imread('./examples/img1.jpg')
img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)

# set is_video=True to enable tracking in video inference
# be sure to use VitInference.reset() function to reset the tracker after each video
# There are a few flags that allows to customize VitInference, be sure to check the class definition
model_path = './ckpts/vitpose-s-coco_25.pth'
yolo_path = './yolov8s.pth'

# If you want to use MPS (on new macbooks) use the torch checkpoints for both ViTPose and Yolo
# If device is None will try to use cuda -> mps -> cpu (otherwise specify 'cpu', 'mps' or 'cuda')
# dataset and det_class parameters can be inferred from the ckpt name, but you can specify them.
model = VitInference(model_path, yolo_path, model_name='s', yolo_size=320, is_video=False, device=None)

# Infer keypoints, output is a dict where keys are person ids and values are keypoints (np.ndarray (25, 3): (y, x, score))
# If is_video=True the IDs will be consistent among the ordered video frames.
keypoints = model.inference(img)

# call model.reset() after each video

img = model.draw(show_yolo=True)  # Returns RGB image with drawings
cv2.imshow('image', cv2.cvtColor(img, cv2.COLOR_RGB2BGR)); cv2.waitKey(0)

Note

If the input file is a video SORT is used to track people IDs and output consistent identifications.

OUTPUT json format

The output format of the json files:

{
    "keypoints":
    [  # The list of frames, len(json['keypoints']) == len(video)
        {  # For each frame a dict
            "0": [  #  keys are id to track people and value the keypoints
                [121.19, 458.15, 0.99], # Each keypoint is (y, x, score)
                [110.02, 469.43, 0.98],
                [110.86, 445.04, 0.99],
            ],
            "1": [
                ...
            ],
        },
        {
            "0": [
                [122.19, 458.15, 0.91],
                [105.02, 469.43, 0.95],
                [122.86, 445.04, 0.99],
            ],
            "1": [
                ...
            ]
        }
    ],
    "skeleton":
    {  # Skeleton reference, key the idx, value the name
        "0": "nose",
        "1": "left_eye",
        "2": "right_eye",
        "3": "left_ear",
        "4": "right_ear",
        "5": "neck",
        ...
    }
}

Finetuning

Finetuning is possible but not officially supported right now. If you would like to finetune and need help open an issue.
You can check train.py, datasets/COCO.py and config.yaml for details.

---

TODO:

• refactor finetuning
• benchmark and check bottlenecks of inference pipeline
• parallel batched inference
• other minor fixes
• yolo version for animal pose, check #18
• solve cuda exceptions on script exit when using tensorrt (no idea how)
• add infos about inferred informations during inference, better output of inference status (device etc)
• check if is possible to make colab work without runtime restart

Feel free to open issues, pull requests and contribute on these TODOs.

Reference

Thanks to the VitPose authors and their official implementation ViTAE-Transformer/ViTPose.
The SORT code is taken from abewley/sort