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error python

import numpy as np

import cv2 from matplotlib import pyplot as plt

face_cascade = cv2.CascadeClassifier(r'D:\OpenCV\opencv\sources\data\haarcascades\haarcascade_frontalface_default.xml') eye_cascade = cv2.CascadeClassifier(r'D:\OpenCV\opencv\sources\data\haarcascades\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:
    img = 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)
k=cv2.waitKey(30)  & 0xff
if k==27:
    break
cap.release()
cv2.destroyAllWindows()

I'm trying to use facedectecting.but I don't know why i cant open my camera. other code can open my camera. this is error information File "face.py", line 12, in <module> gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) cv2.error: C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:7456: error: (-215) scn == 3 || scn == 4 in function cv::ipp_cvtColor

error python

import numpy as np

import cv2 from matplotlib import pyplot as ~~plt~~

plt face_cascade = cv2.CascadeClassifier(r'D:\OpenCV\opencv\sources\data\haarcascades\haarcascade_frontalface_default.xml') eye_cascade = ~~cv2.CascadeClassifier(r'D:\OpenCV\opencv\sources\data\haarcascades\haarcascade_eye.xml')~~

cap=cv2.VideoCapture(0)

cv2.CascadeClassifier(r'D:\OpenCV\opencv\sources\data\haarcascades\haarcascade_eye.xml') cap=cv2.VideoCapture(0) while 1: ret, img=cap.read() gray = cv2.cvtColor(img, ~~cv2.COLOR_BGR2GRAY)~~

cv2.COLOR_BGR2GRAY)

    faces=face_cascade.detectMultiScale(gray,1.3,5)
 for(x,y,w,h) in faces:
     img = 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)
 k=cv2.waitKey(30)  & 0xff
 if k==27:
     break
 cap.release()
 cv2.destroyAllWindows()

I'm trying to use facedectecting.but I don't know why i cant open my camera. other code can open my camera. this is error information

 File "face.py", line 12, in <module>
    gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
cv2.error: C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:7456: error: (-215) scn == 3 || scn == 4 in function cv::ipp_cvtColor
 
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cv::ipp_cvtColor

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