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facelocker.py
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facelocker.py
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import cv2
import time
import argparse
import ctypes
import platform
def lock_screen(platform_name):
if platform_name == 'Darwin':
login = ctypes.CDLL('/System/Library/PrivateFrameworks/login.framework/Versions/Current/login')
login.SACLockScreenImmediate()
elif platform_name == 'Windows':
ctypes.windll.user32.LockWorkStation()
def face_recognized(cap, face_cascade, demo_mode) -> bool:
ret, frame = cap.read()
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
faces = face_cascade.detectMultiScale(gray, scaleFactor=1.1, minNeighbors=5)
if demo_mode:
for (x, y, w, h) in faces:
cv2.rectangle(frame, (x, y), (x + w, y + h), (0, 255, 0), 2)
cv2.imshow('Facelocker', frame)
cv2.waitKey(1)
return len(faces) > 0
def main(time_interval=10, refresh_rate=1, demo_mode=False):
print('Starting Facelocker with interval of {} seconds...'.format(time_interval))
cap = cv2.VideoCapture(0)
face_cascade = cv2.CascadeClassifier(cv2.data.haarcascades + 'haarcascade_frontalface_default.xml')
face_detected_time = time.time()
platform_name = platform.system()
print('Looking for faces...'.format(time_interval))
while True:
try:
if face_recognized(cap, face_cascade, demo_mode):
face_detected_time = time.time()
except cv2.error:
print('Failed to access camera. Did you grant permissions?')
break
if time.time() - face_detected_time > time_interval:
lock_screen(platform_name)
time.sleep(refresh_rate)
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('interval', nargs='?', default=10, type=int, help='Time interval to lock after (Default: 10s)')
parser.add_argument('-r', '--refresh', dest='rate', default=1, type=float, help='Camera refresh rate in seconds (Default: 1s)')
parser.add_argument('-d', '--demo', action='store_true', default=False,
help='Run in demo mode (show camera frames)')
args = parser.parse_args()
main(time_interval=args.interval, refresh_rate=args.rate, demo_mode=args.demo)