Harr Cascade CV2错误:(-215)scn == 3 || scn == 4 in function cv :: ipp_cvtColor

时间:2017-01-04 18:40:49

标签: python opencv vision cv2

进入视觉编程并遇到问题。这是我的代码:

import numpy as np
import cv2

# multiple cascades: https://github.com/Itseez/opencv/tree/master/data/haarcascades

#https://github.com/Itseez/opencv/blob/master/data/haarcascades/haarcascade_frontalface_default.xml
face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml')
#https://github.com/Itseez/opencv/blob/master/data/haarcascades/haarcascade_eye.xml
eye_cascade = cv2.CascadeClassifier('haarcascade_eye.xml')

cap = cv2.VideoCapture(0)

while 1:
    ret, img = cap.read()
    gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
    faces = face_cascade.detectMultiScale(gray, 1.3, 5)
    for (x, y, w, h) in faces:
        cv2.rectangle(img, (x, y), (x + w, y + h), (255, 0, 0), 2)
        roi_gray = gray[y:y + h, x:x + w]
        roi_color = img[y:y + h, x:x + w]
        eyes = eye_cascade.detectMultiScale(roi_gray)
        for (ex, ey, ew, eh) in eyes:
            cv2.rectangle(roi_color, (ex, ey), (ex + ew, ey + eh), (0, 255, 0), 2)
        cv2.imshow('img', img)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()

我在cv :: ipp_cvtColor中遇到错误" OpenCV错误:断言失败(scn == 3 || scn == 4),文件C:\ projects \ opencv-python \ opencv \ modules \ imgproc \ src \ color.cpp,第7456行 Traceback(最近一次调用最后一次):   File" C:/Users/Peter/PycharmProjects/untitled/FaceDetection.py" ;,第15行,在     gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY) cv2.error:C:\ projects \ opencv-python \ opencv \ modules \ imgproc \ src \ color.cpp:7456:错误:(-215)scn == 3 || scn == 4 in function cv :: ipp_cvtColor"

我可以在使用静止图像而非视频输入时找到解决此问题的示例。我检查了img.shape,它是3维,所以这不是我的问题。有什么想法吗?

由于

2 个答案:

答案 0 :(得分:0)

更改:

while 1:

为:

while ret == True:

希望这有帮助!

答案 1 :(得分:0)

可能'haarcascade_frontalface_default.xml'不在我们脚本的文件夹中。