人脸识别还能这么玩

with self.mp_face_detection.FaceDetection(
model_selection=0, min_detection_confidence=0.9) as face_detection:
while cap.isOpened():
success, image = cap.read()
image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
results = face_detection.process(image)
image = cv2.cvtColor(image, cv2.COLOR_RGB2BGR)
if results.detections:
for detection in results.detections:
# 获取人脸框坐标
face_box = detection.location_data.relative_bounding_box
face_w, face_h = int(face_box.width * frame_w), int(face_box.height * frame_h)
face_l = int(face_box.xmin * frame_w) + face_w
face_t = int(face_box.ymin * frame_h)
face_r, face_b = face_l - face_w, face_t + face_h
# 显示人脸框
cv2.rectangle(image, (face_l, face_t), (face_r, face_b), (0, 255, 255), 2)
self.draw_zh_img(image, self.face_box_name_img, (face_r + face_l) // 2, face_t - 5)

pose_direct, pose_key_points = self.pose_estimate(detection)
# 显示人脸 6 个关键点
for point_name in FaceKeyPoint:
mp_point = self.mp_face_detection.get_key_point(detection, point_name)

point_x = int(mp_point.x * frame_w)
point_y = int(mp_point.y * frame_h)

point_color = (0, 255, 0) if point_name in pose_key_points else (255, 0, 255)
cv2.circle(image, (point_x, point_y), 4, point_color, -1)
# 显示关键点中文名称
point_name_img = self.face_key_point_name_img[point_name]
self.draw_zh_img(image, point_name_img, point_x, point_y-5)

# 左耳与鼻子水平距离，判断面部左转
left_ear_to_nose_dist = left_ear.x - nose_pos.x 
# 右耳与鼻子水平距离，判断面部右转
nose_to_right_ear_dist = nose_pos.x - right_ear.x

# 鼻子与左眼垂直距离，判断面部向上
nose_to_left_eye_dist = nose_pos.y - left_eye.y
# 左耳与左眼垂直距离，判断面部向下
left_ear_to_left_eye_dist = left_ear.y - left_eye.y

if left_ear_to_nose_dist < 0.07:
# print('左转')
self.key_board.press_key('A')
time.sleep(0.07)
self.key_board.release_key('A')

return 'A', [FaceKeyPoint.NOSE_TIP, FaceKeyPoint.LEFT_EAR_TRAGION]
if nose_to_right_ear_dist < 0.07:
# print('右转')
self.key_board.press_key('D')
time.sleep(0.07)
self.key_board.release_key('D')
return 'D', [FaceKeyPoint.NOSE_TIP, FaceKeyPoint.RIGHT_EAR_TRAGION]

self.key_board = PyKeyboard()
# print('左转')
self.key_board.press_key('A')
time.sleep(0.07)
self.key_board.release_key('A')