camshift.py 文件源码

def __init__(self, scaling_factor=0.5):
        # Initialize the video capture object
        self.cap = cv2.VideoCapture(0)

        # Capture the frame from the webcam
        _, self.frame = self.cap.read()

        # Scaling factor for the captured frame
        self.scaling_factor = scaling_factor

        # Resize the frame
        self.frame = cv2.resize(self.frame, None, 
                fx=self.scaling_factor, fy=self.scaling_factor, 
                interpolation=cv2.INTER_AREA)

        # Create a window to display the frame
        cv2.namedWindow('Object Tracker')

        # Set the mouse callback function to track the mouse
        cv2.setMouseCallback('Object Tracker', self.mouse_event)

        # Initialize variable related to rectangular region selection
        self.selection = None

        # Initialize variable related to starting position 
        self.drag_start = None

        # Initialize variable related to the state of tracking 
        self.tracking_state = 0

    # Define a method to track the mouse events