OpenCV 4 with Python Blueprints - Second Edition

Understanding the MultiObjectTracker class

The constructor of the tracker class is straightforward. All it does is set up the termination criteria for mean-shift tracking and store the conditions for the minimum contour area (min_area) and the minimum average speed normalized by object size (min_speed_per_pix) to be considered in the subsequent computation steps:

    def __init__(self, min_object_area: int = 400,                 min_speed_per_pix: float = 0.02):        self.object_boxes = []        self.min_object_area = min_object_area        self.min_speed_per_pix = min_speed_per_pix        self.num_frame_tracked = 0        # Setup the termination criteria, either 100 iteration or move by at        # least 1 pt        self.term_crit = (cv2.TERM_CRITERIA_EPS | cv2.TERM_CRITERIA_COUNT,                          5, 1)

From then on, ...