Picamera 无法使用 Raspberry Pi 进行人脸识别

Question

我的 picamera 通常工作正常，但是当按照上面的帖子操作时，我的 picamera 无法工作。这是我的源代码：from imutils.video import VideoStreamimport argparseimport imutilsimport timeimport cv2import osap = argparse.ArgumentParser()ap.add_argument("-c", "--cascade", required=True,    help = "path to where the face cascade resides")ap.add_argument("-o", "--output", required=True,    help="path to output directory")args = vars(ap.parse_args())detector = cv2.CascadeClassifier(args["cascade"])print("[INFO] starting video stream...")#vs = VideoStream(src=0).start() vs = VideoStream(usePiCamera=True).start()time.sleep(2.0)total = 0while True:    frame = vs.read()    orig = frame.copy()    frame = imutils.resize(frame, width=400)    rects = detector.detectMultiScale(        cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY), scaleFactor=1.1,         minNeighbors=5, minSize=(30, 30))    for (x, y, w, h) in rects:        cv2.rectangle(frame, (x, y), (x + w, y + h), (0, 255, 0), 2)    cv2.imshow("Frame", frame)    key = cv2.waitKey(1) & 0xFF     if key == ord("k"):        p = os.path.sep.join([args["output"], "{}.png".format(            str(total).zfill(5))])        cv2.imwrite(p, orig)        total += 1    elif key == ord("q"):        breakprint("[INFO] {} face images stored".format(total))print("[INFO] cleaning up...")cv2.destroyAllWindows()vs.stop()当我运行这段代码时，[INFO] starting video stream...出现但摄像头未出现在 Raspberry Pi 上；而且，当我面对镜头时，[INFO] {} face images stored [INFO] cleaning up...出现。

Answer 1

你能试试这个吗？

import numpy as np

import cv2

cap = cv2.VideoCapture(0)

while(True):

    # Capture frame-by-frame

    ret, frame = cap.read()

    # Our operations on the frame come here

    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    # Display the resulting frame

    cv2.imshow('frame',gray)

    if cv2.waitKey(1) & 0xFF == ord('q'):

        break

# When everything done, release the capture

cap.release()

cv2.destroyAllWindows()