Reference for ultralytics/models/yolo/pose/predict.py

class PosePredictor(DetectionPredictor):
    """A class extending the DetectionPredictor class for prediction based on a pose model.

    This class specializes in pose estimation, handling keypoints detection alongside standard object detection
    capabilities inherited from DetectionPredictor.

    Attributes:
        args (namespace): Configuration arguments for the predictor.
        model (torch.nn.Module): The loaded YOLO pose model with keypoint detection capabilities.

    Methods:
        construct_result: Construct the result object from the prediction, including keypoints.

    Examples:
        >>> from ultralytics.utils import ASSETS
        >>> from ultralytics.models.yolo.pose import PosePredictor
        >>> args = dict(model="yolo11n-pose.pt", source=ASSETS)
        >>> predictor = PosePredictor(overrides=args)
        >>> predictor.predict_cli()
    """

    def __init__(self, cfg=DEFAULT_CFG, overrides=None, _callbacks=None):
        """Initialize PosePredictor for pose estimation tasks.

        Sets up a PosePredictor instance, configuring it for pose detection tasks and handling device-specific warnings
        for Apple MPS.

        Args:
            cfg (Any): Configuration for the predictor.
            overrides (dict, optional): Configuration overrides that take precedence over cfg.
            _callbacks (list, optional): List of callback functions to be invoked during prediction.
        """
        super().__init__(cfg, overrides, _callbacks)
        self.args.task = "pose"

def construct_result(self, pred, img, orig_img, img_path):
    """Construct the result object from the prediction, including keypoints.

    Extends the parent class implementation by extracting keypoint data from predictions and adding them to the
    result object.

    Args:
        pred (torch.Tensor): The predicted bounding boxes, scores, and keypoints with shape (N, 6+K*D) where N is
            the number of detections, K is the number of keypoints, and D is the keypoint dimension.
        img (torch.Tensor): The processed input image tensor with shape (B, C, H, W).
        orig_img (np.ndarray): The original unprocessed image as a numpy array.
        img_path (str): The path to the original image file.

    Returns:
        (Results): The result object containing the original image, image path, class names, bounding boxes, and
            keypoints.
    """
    result = super().construct_result(pred, img, orig_img, img_path)
    # Extract keypoints from prediction and reshape according to model's keypoint shape
    pred_kpts = pred[:, 6:].view(pred.shape[0], *self.model.kpt_shape)
    # Scale keypoints coordinates to match the original image dimensions
    pred_kpts = ops.scale_coords(img.shape[2:], pred_kpts, orig_img.shape)
    result.update(keypoints=pred_kpts)
    return result