suc, frame = cam.read()
    # 讀取不到退出
    if not suc:
        break

    # ---------FPS------------#
    ctime = time.time()
    fps = int(1 / (ctime - ptime))
    ptime = ctime
    cv2.putText(frame, f'FPS:{fps}', (frame.shape[1] - 120, frame.shape[0] - 20), cv2.FONT_HERSHEY_PLAIN, 2,
                (0, 200, 0), 3)

    # ------檢測人臉------#
    # 轉(zhuǎn)為灰度
    img_gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    faces = face_model(img_gray)
    for face in faces:
        # 檢測人臉，框起來-#
        x1 = face.left()
        y1 = face.top()
        x2 = face.right()
        y2 = face.bottom()
        # print(face.top())
        cv2.rectangle(frame, (x1, y1), (x2, y2), (200, 0, 00), 2)

        # ----------檢測人臉標注-----------#
        shapes = landmark_model(img_gray, face)
        shape = face_utils.shape_to_np(shapes)

        # -------檢測上下唇--------#
        lip = shape[48:60]
        cv2.drawContours(frame, [lip], -1, (0, 165, 255), thickness=3)

        # -------計算上下唇距離-----#
        lip_dist = cal_yawn(shape)
        # 打印距離
        # print(lip_dist)
        # 大于設(shè)定值，則認定是打哈欠
        if lip_dist > yawn_thresh:
            cv2.putText(frame, f'User Yawning!', (frame.shape[1] // 2 - 170, frame.shape[0] // 2),
                        cv2.FONT_HERSHEY_SIMPLEX, 2, (0, 0, 200), 2)

    # 按字母q退出
    cv2.imshow('Webcam', frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break