Téglalap rajzolás arc köré

        import cv2

        faceCascade = cv2.CascadeClassifier("Resources/haarcascade_frontalface_default.xml")
        img = cv2.imread("Resources/lena.png")
        imgGray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

        faces = faceCascade.detectMultiScale(imgGray, 1.1, 4)

        for (x,y,w,h) in faces:
            cv2.rectangle(img, (x,y), (x+w, y+h), (255,0,0), 2)

        cv2.imshow("Result", img)

        cv2.waitKey(0)