I made face recognition app using face_recognition and OpenCV libraries but i want to break the while loop 10 seconds after executed the script. I can't use OpenCV's waitKey(10000) because of the low fps. How can i achieve this? Thank you.
While loop is;
flag = True
while flag:
# ********** FACE RECOGNITION PART START **********
ret, frame = video_capture.read()
small_frame = cv2.resize(frame, (0, 0), fx=0.25, fy=0.25)
rgb_small_frame = small_frame[:, :, ::-1]
if process_this_frame:
face_locations = face_recognition.face_locations(rgb_small_frame)
face_encodings = face_recognition.face_encodings(rgb_small_frame, face_locations)
face_names = []
for face_encoding in face_encodings:
matches = face_recognition.compare_faces(known_face_encodings, face_encoding)
name = "Unknown"
face_distances = face_recognition.face_distance(known_face_encodings, face_encoding)
best_match_index = np.argmin(face_distances)
if matches[best_match_index]:
name = known_face_names[best_match_index]
empID = employeeID[best_match_index]
empFNAME = employeeFirstName[best_match_index]
empLNAME = employeeLastName[best_match_index]
face_names.append(name)
process_this_frame = not process_this_frame
# ********** FACE RECOGNITION PART END **********
# ********** FACE VISUALIZATION PART START **********
for (top, right, bottom, left), name in zip(face_locations, face_names):
top *= 4
right *= 4
bottom *= 4
left *= 4
cv2.rectangle(frame, (left, top), (right, bottom), (0, 0, 255), 2)
cv2.rectangle(frame, (left, bottom - 35), (right, bottom), (0, 0, 255), cv2.FILLED)
font = cv2.FONT_HERSHEY_SIMPLEX
cv2.putText(frame, name, (left 6, bottom - 6), font, 1.0, (255, 255, 255), 1)
# ********** FACE VISUALIZATION PART END **********
cv2.imshow('Video', frame)
# ********** QR CODE PART START **********
_, img = video_capture.read()
data, bbox, _ = qrDetector.detectAndDecode(img)
if data:
a=data
print(str(a))
if cv2.waitKey(1) & 0xFF == ord('q'):
break
# ********** QR CODE PART END **********
video_capture.release()
cv2.destroyAllWindows()
I tried these for break the loop;
Time module
starting_time = time.time()
while flag:
///
///
ending_time = time.time()
if ending_time - starting_time == 10:
break
Keypressing
from pynput.keyboard import Key, Controller
keyboard = Controller()
while flag:
///
///
keyboard.press('q')
if cv2.waitKey(1) & 0xFF == ord('q'):
break
keyboard.release('q')
When i tried Time module, OpenCV screen is frozen and stopped working, key pressing just doesn't work at all.
CodePudding user response:
Just in a few words, sorry: use datetime and timedelta
from datetime import datetime, timedelta
...
loop_start_moment = datetime.now()
while ...:
# loop body
if datetime.now() - loop_start_moment > timedelta(seconds=10):
break