利用face_recognition库裁取人脸

 from PIL import Image
 import face_recognition

 # Load the jpg file into a numpy array
 image = face_recognition.load_image_file(".jpg")

 # Find all the faces in the image
 face_locations = face_recognition.face_locations(image)

 print("I found {} face(s) in this photograph.".format(len(face_locations)))

 for face_location in face_locations:

     # Print the location of each face in this image
     top, right, bottom, left = face_location
     print("A face is located at pixel location Top: {}, Left: {}, Bottom: {}, Right: {}".format(top, left, bottom, right))

     # You can access the actual face itself like this:
     face_image = image[top:bottom, left:right]
     pil_image = Image.fromarray(face_image)
     pil_image.show()