import cv2

face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml')

img = cv2.imread('lena.jpg')
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

faces = face_cascade.detectMultiScale(gray,1.1,4)

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

cv2.imshow('Face Recognition', img)

k = cv2.waitKey()
