Capture and save faces from a webcam

face_saver.py

import cv2, time

cap = cv2.VideoCapture(0)
cap.set(3, 640) #WIDTH
cap.set(4, 480) #HEIGHT

face_cascade = cv2.CascadeClassifier('/home/okeefd3/.local/lib/python3.6/site-packages/cv2/data/haarcascade_frontalface_default.xml')
face_counter = 0

while(True):
    ret, frame = cap.read()
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    faces = face_cascade.detectMultiScale(gray, 1.3, 5)
    for (x,y,w,h) in faces:
        print(len(faces))
        crop_img = frame[y:y+h, x:x+w]
        cv2.imwrite('/home/okeefd3/Desktop/faces/face{}.jpeg'.format(face_counter),crop_img)
        cv2.rectangle(frame,(x,y),(x+w,y+h),(255,0,0),2)
        roi_gray = gray[y:y+h, x:x+w]
        roi_color = frame[y:y+h, x:x+w]
        face_counter+=1
    cv2.imshow('frame',frame)
    time.sleep(0.1)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
cap.release()
cv2.destroyAllWindows()