OpenCV-面部和眼睛检测错误不断出现

Question

我是编程和机器学习的新手。当我遵循教程并尝试运行代码时。但是错误不断出现，我无法使其正常工作。

错误：（-215）scn == 3 || scn == 4在函数ipp_cvtColor中。

import cv2

# Loading the cascades
face_cascade = cv2.CascadeClassifier('D:\Cam\Summer/ research\Computer_Vision_A_Z/Module_1_Face_Recognition/haarcascade_frontalface_default.xml')
eye_cascade = cv2.CascadeClassifier('D:\Cam\Summer/ research\Computer_Vision_A_Z/Module_1_Face_Recognition/haarcascade_eye.xml')

# Defining a function that will do the detections
def detect(gray, frame): 
    faces = face_cascade.detectMultiScale(gray, 1.3, 5) 
    for (x, y, w, h) in faces:
        cv2.rectangle(frame, (x, y), (x+w, y+h), (255, 0, 0), 2)
        roi_gray = gray[y:y+h, x:x+w] # Zone of interest
        roi_color = frame[y:y+h, x:x+w]
        eyes = eye_cascade.detectMultiScale(roi_gray, 1.1, 3)
        for (ex, ey, ew, eh) in eyes: 
            cv2.rectangle(roi_color, (ex, ey), (ex+ew, ey+eh), (0, 255, 0), 2)

    return frame

# Doing some Face Recognition with the webcam
cap = cv2.VideoCapture(0)

while True:
    ret, frame = cap.read()
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    canvas = detect(gray, frame)
    cv2.imshow('Video', canvas)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
cap.release()
cv2.destroyAllWindows()

Answer 1

看起来，cv2.CascadeClassifier（）找不到。xml文件。您需要将haarcascade_frontalface_default.xml和haarcascade_eye.xml文件移动到当前工作目录中。然后如下更改xml文件的加载过程。

face_cascade = cv2.CascadeClassifier("haarcascade_frontalface_default.xml")
eye_cascade = cv2.CascadeClassifier("haarcascade_eye.xml")

另外，最好提供有关错误的更多信息（例如屏幕截图。）>