人脸识别带四个角标的矩形

1.一直想让识别人脸的框好看一点，矩形圆形都太low,这几天在楼下看到机器识别人脸都是带四个角标的，没有说用整个矩形标注脸，在网上没找到，自己写了一个，效果没问题。

import cv2
cam = cv2.VideoCapture("1.mp4")
cam.set(3, 640)
cam.set(4, 480)
count = 0
a = 0
faceCascade = cv2.CascadeClassifier("haarcascade_frontalface_default.xml")
while (cam.isOpened()):
    ret, frame = cam.read()
    if ret == True:
        gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
        faces = faceCascade.detectMultiScale(
            gray,
            scaleFactor=1.1,
            minNeighbors=5,
            minSize=(30, 30),
            flags=cv2.CASCADE_SCALE_IMAGE
        )
        for (x, y, w, h) in faces:
            cv2.line(frame, (x, y+int((h)/4)), (x, y), (0, 0, 255), 2)
            cv2.line(frame, (x, y), (int(x+(w)/4), y), (0, 0, 255), 2)
            cv2.line(frame, (x+int(3*(w)/4), y), (w+x, y), (0, 0, 255), 2)
            cv2.line(frame, (w+x, y), (w+x, y+int((h)/4)), (0, 0, 255), 2)
            cv2.line(frame, (w+x,int(y+3*(h)/4)), (w+x, h+y), (0, 0, 255), 2)
            cv2.line(frame, (w+x, h+y), (x+int(3*(w)/4), h+y), (0, 0, 255), 2)
            cv2.line(frame, (int(x+(w)/4), h+y), (x, h+y), (0, 0, 255), 2)
            cv2.line(frame, (x, h+y), (x,int(y+3*(h)/4)), (0, 0, 255), 2)
        cv2.imshow('facesFound', frame)
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
    else:
        break
cam.release()
cv2.destroyAllWindows()

贴上图片