#coding:utf-8'''脸部检测'''import sysimport dlibfrom skimage import ioimport cv2# 加载并初始化检测器# 模型下载地址http://dlib.net/files/mmod_human_face_detector.dat.bz2cnn_face_detector = dlib.cnn_face_detection_model_v1('temp/dlib/mmod_human_face_detector.dat')camera = cv2.VideoCapture(0)if not camera.isOpened():    print("cannot open camear")    exit(0)while True:    ret,frame = camera.read()        if not ret:        continue    frame_new = cv2.cvtColor(frame,cv2.COLOR_BGR2RGB)    # 检测脸部    dets = cnn_face_detector(frame_new, 1)    print("Number of faces detected: {}".format(len(dets)))    # 查找脸部位置    for i, face in enumerate(dets):        print("Detection {}: Left: {} Top: {} Right: {} Bottom: {} Confidence: {}".format(            i, face.rect.left(), face.rect.top(), face.rect.right(), face.rect.bottom(), face.confidence))        # 标注脸部位置        cv2.rectangle(frame, (face.rect.left(), face.rect.top()), (face.rect.right(), face.rect.bottom()), (0, 255, 0), 3)    cv2.imshow("Camera",frame)    key = cv2.waitKey(1)    if key == 27:        breakcv2.destroyAllWindows()