Question

import numpy as np
import cv2
import thread, winsound

face_cascade = cv2.CascadeClassifier('C:\Users\Saddaqat\Desktop\Softwares\opencv\build\share\OpenCV\haarcascades\haarcascade_frontalface_default.xml')
eye_cascade = cv2.CascadeClassifier('C:\Users\Saddaqat\Desktop\Softwares\opencv\build\share\OpenCV\haarcascades\haarcascade_eye.xml')

def beep():
  for i in xrange(4):
    winsound.Beep(1500, 250)

cam = cv2.VideoCapture(0)
count = 0
iters = 0
while(True):
      ret, cur = cam.read()
      gray = cv2.cvtColor(cur, cv2.COLOR_BGR2GRAY)
      faces = face

    _cascade.detectMultiScale(gray,scaleFactor = 1.1, minNeighbors=1, minSize=(10,10))
          for (x,y,w,h) in faces:
            #cv2.rectangle(cur,(x,y),(x+w,y+h),(255,0,0),2)
            roi_gray = gray[y:y+h,x:x+w]
            roi_color = cur[y:y+h,x:x+w]
            eyes = eye_cascade.detectMultiScale(roi_gray)
        if len(eyes) == 0:
          print "Eyes closed"
        else:
          print "Eyes open"
        count += len(eyes)
        iters += 1
        if iters == 2:
          iters = 0
          if count == 0:
            print "Drowsiness Detected!!!"
            thread.start_new_thread(beep,())
          count = 0
        for (ex,ey,ew,eh) in eyes:
            cv2.rectangle(roi_color,(ex,ey),(ex+ew,ey+eh), (0,255,0),2)
      cv2.imshow('frame', cur)
      if cv2.waitKey(1) & 0xFF == ord('q'):
        cv2.destroyAllWindows()
        break
//

我正面临此错误请妥善解决此错误。提前感谢和爱;） Traceback（最近一次调用最后一次）：文件＆＃34; C：\ Users \ Saddaqat \ Desktop \疲劳检测代码＆＃34;，第17行，in gray = cv2.cvtColor（cur，cv2.COLOR_BGR2GRAY）错误：........ \ opencv \ modules \ imgproc \ src \ color.cpp：3739：错误：（-215）scn == 3 ||函数cv :: cvtColor中的scn == 4

Answer 1

好吧，对我来说，看起来VideoCapture无效。您应该在阅读图像后检查是否可以阅读：

ret, cur = cam.read()
if not ret:
    print "VideoCapture read no frame."
    break

如果是这种情况，那么SO中有一些可能对您有帮助的答案，例如：OpenCV 2.4 VideoCapture not working on Windows 基本上，他们说你可能有ffmpeg的问题。也许你必须将它添加到Windows路径，和/或重命名它以在其上安装OpenCV版本。

Python-Opencv错误：（-215）scn == 3 ||函数cv :: cvtColor中的scn == 4

1 个答案: