user_interaction.py 文件源码

def getPerpectiveCoordinates(frame, windowName, mouse):
    cv2.imshow(windowName, frame)   
    cv2.setMouseCallback(windowName, mouse.leftClick)

    i = 0
    coords = []

    while i < 4:
        i += 1
        mouse.x = 0
        mouse.y = 0
        mouse.leftClicked = False

        while mouse.leftClicked == False:
            # wait for key press
            key = cv2.waitKey(1) & 0xFF

        coords.append((mouse.x, mouse.y))

    return coords

# debug coordinates by moving the mouse