我在做人脸识别的程序中遇到这样的问题,如下:
def openCamera(self):
cap = cv2.VideoCapture(0, cv2.CAP_DSHOW)
if cap.isOpened():
engine = pyttsx3.init()
engine.say('开始识别')
engine.runAndWait()
self.rightLabel.show()
cont = 0
while cap.isOpened():
retval, frame = cap.read()
if not retval:
print('can not read frame')
break
self.blinked_detect.detect(frame, name='Null', operation=2)
frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
qimg = QImage(frame.data, frame.shape[1], frame.shape[0], QImage.Format_RGB888)
# 图片显示到label
self.rightLabel.setPixmap(QPixmap.fromImage(qimg))
key = cv2.waitKey(7)
print(key,"---------------")
if key == 27:
break
else:
不知道如何用ey = cv2.waitKey(7)退出