必需的參數'rejectLevels'（pos 2）找不到OpenCV Raspberry Pi

Question

我有一個小腳本，我正在將來自Raspberry Pi上的picamera的圖像傳遞給OpenCV的流。一旦OpenCV有圖像，它應該使用哈爾級聯方法尋找人臉。如果我將臉部檢測分開，代碼將運行正常，讀取圖像並按照預期上傳到遠程服務器。當我把人臉檢測中，我得到了以下錯誤：

標誌= cv2.cv.CV_HAAR_SCALE_IMAGE

類型錯誤：必需的參數「rejectLevels」（位置2）未找到

這是代碼：

current_time = time.time() 
endtime = current_time + 30 

stream = io.BytesIO() 

CAMERA_WIDTH = 640 
CAMERA_HEIGHT = 480 

cascPath = sys.argv[1] 
faceCascade = cv2.CascadeClassifier(cascPath) 

while current_time <= endtime: 
    timeStamp = time.strftime('%d-%m-%Y-%H-%M-%S', time.localtime(current_time)) 

    with picamera.PiCamera() as cam: 
     cam.rotation = 270 
     cam.resolution = (CAMERA_WIDTH, CAMERA_HEIGHT) 
     cam.capture(stream, format='bmp') 

    data = np.fromstring(stream.getvalue(), dtype=np.uint8) 
    img = cv2.imdecode(data, 1) 
    stream.seek(0) 
    gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) 

    faces = faceCascade.detectMultiScale(
     gray, 
     scaleFactor=1.1, 
     minNeighbours=5, 
     minSize=(30,30), 
     flags = cv2.cv.CV_HAAR_SCALE_IMAGE 
    ) 

    print("Found {0} faces!".format(len(faces))) 

我不確定到底是什麼錯誤告訴我，有些建議會很棒！

Answer 1

您的參數中有錯別字，請將minNeighbours更改爲minNeighbors。