PoseTrackerNode¶

class mmpose.apis.webcam.nodes.PoseTrackerNode(name: str, det_model_config: str, det_model_checkpoint: str, pose_model_config: str, pose_model_checkpoint: str, input_buffer: str, output_buffer: Union[str, List[str]], enable_key: Optional[Union[str, int]] = None, enable: bool = True, device: str = 'cuda:0', det_interval: int = 1, class_ids: Optional[List] = None, labels: Optional[List] = None, bbox_thr: float = 0.5, kpt2bbox_cfg: Optional[dict] = None, smooth: bool = False, smooth_filter_cfg: str = 'configs/_base_/filters/one_euro.py')[source]¶

Perform object detection and top-down pose estimation. Only detect objects every few frames, and use the pose estimation results to track the object at interval.

Note that MMDetection is required for this node. Please refer to MMDetection documentation for the installation guide.

Parameters

name (str) – The node name (also thread name)
det_model_cfg (str) – The config file of the detection model
det_model_checkpoint (str) – The checkpoint file of the detection model
pose_model_cfg (str) – The config file of the pose estimation model
pose_model_checkpoint (str) – The checkpoint file of the pose estimation model
input_buffer (str) – The name of the input buffer
output_buffer (str|list) – The name(s) of the output buffer(s)
enable_key (str|int, optional) – Set a hot-key to toggle enable/disable of the node. If an int value is given, it will be treated as an ascii code of a key. Please note: (1) If enable_key is set, the bypass() method need to be overridden to define the node behavior when disabled; (2) Some hot-keys are reserved for particular use. For example: ‘q’, ‘Q’ and 27 are used for exiting. Default: None
enable (bool) – Default enable/disable status. Default: True
device (str) – Specify the device to hold model weights and inference the model. Default: 'cuda:0'
det_interval (int) – Set the detection interval in frames. For example, det_interval==10 means inference the detection model every 10 frames. Default: 1
class_ids (list[int], optional) – Specify the object category indices to apply pose estimation. If both class_ids and labels are given, labels will be ignored. If neither is given, pose estimation will be applied for all objects. Default: None
labels (list[str], optional) – Specify the object category names to apply pose estimation. See also class_ids. Default: None
bbox_thr (float) – Set a threshold to filter out objects with low bbox scores. Default: 0.5
kpt2bbox_cfg (dict, optional) – Configure the process to get object bbox from its keypoints during tracking. Specifically, the bbox is obtained from the minimal outer rectangle of the keyponits with following configurable arguments: 'scale', the coefficient to expand the keypoint outer rectangle, defaults to 1.5; 'kpt_thr': a threshold to filter out low-scored keypoint, defaults to 0.3. See self.default_kpt2bbox_cfg for details
smooth (bool) – If set to True, a Smoother will be used to refine the pose estimation result. Default: True
smooth_filter_cfg (str) – The filter config path to build the smoother. Only valid when smooth==True. Default to use an OneEuro filter

Example::

>>> cfg = dict(
...    type='PoseTrackerNode',
...    name='pose tracker',
...    det_model_config='demo/mmdetection_cfg/'
...    'ssdlite_mobilenetv2_scratch_600e_coco.py',
...    det_model_checkpoint='https://download.openmmlab.com'
...    '/mmdetection/v2.0/ssd/'
...    'ssdlite_mobilenetv2_scratch_600e_coco/ssdlite_mobilenetv2_'
...    'scratch_600e_coco_20210629_110627-974d9307.pth',
...    pose_model_config='configs/wholebody/2d_kpt_sview_rgb_img/'
...    'topdown_heatmap/coco-wholebody/'
...    'vipnas_mbv3_coco_wholebody_256x192_dark.py',
...    pose_model_checkpoint='https://download.openmmlab.com/mmpose/'
...    'top_down/vipnas/vipnas_mbv3_coco_wholebody_256x192_dark'
...    '-e2158108_20211205.pth',
...    det_interval=10,
...    labels=['person'],
...    smooth=True,
...    device='cuda:0',
...    # `_input_` is an executor-reserved buffer
...    input_buffer='_input_',
...    output_buffer='human_pose')

>>> from mmpose.apis.webcam.nodes import NODES
>>> node = NODES.build(cfg)

bypass(input_msgs)[source]¶

The method that defines the node behavior when disabled.

Note that a node must override this method if it has enable_key. This method has the same signature as process().

Parameters: input_msgs (dict[str, Message]) – The input data collected from the buffers. For each item, the key is the input_name of the registered input buffer, and the value is a Message instance fetched from the buffer (or None if the buffer is non-trigger and not ready).
Returns: The output message of the node which will be send to all registered output buffers.
Return type: Message

process(input_msgs)[source]¶

The method that implements the function of the node.

This method will be invoked when the node is enabled and the input data is ready. All subclasses of Node should override this method.

Parameters: input_msgs (dict[str, Message]) – The input data collected from the buffers. For each item, the key is the input_name of the registered input buffer, and the value is a Message instance fetched from the buffer (or None if the buffer is non-trigger and not ready).
Returns: The output message of the node which will be send to all registered output buffers.
Return type: Message