CODEWITHSUNDEEP
pythonopencvimage-processingbackground-subtraction
Kartik Madhira
Kartik Madhira

Reputation: 23

cv2.createBackgroundSubtractorMOG2() error

Could anyone help me on this one? I'm trying for a background Subtracting method and used to perfectly run fine while using the cv2.BackgroundSubtractorMOG() method in previous opencv versions.

import cv2
backsub = cv2.createBackgroundSubtractorMOG2()
capture = cv2.VideoCapture("headcount.avi")
i = 0
if capture:
  while True:

    ret, frame = capture.read()
    if ret:
        fgmask = backsub.apply(frame, None, 0.01)
        erode=cv2.erode(fgmask,Nonei,terations=3)
        moments=cv2.moments(erode,True)

But using opencv 3.1.0 i'm facing problems while using the cv2.createBackgroundSubtractorMOG2() function and this is the error i'm getting,while applying mask operation

Error: fgmask = backsub.apply(frame, 1, 0.01) error: C:\builds\master_PackSlaveAddon-win32-vc12-static\opencv\modules\python\src2\cv2.cpp:163: error: (-215) The data should normally be NULL! in function NumpyAllocator::allocate

Upvotes: 0

Views: 3093

Answers (2)

Ilya Libin
Ilya Libin

Reputation: 1627

Simply add this to your code.

cv2.ocl.setUseOpenCL(False)

More information here: https://github.com/opencv/opencv/issues/6055

Upvotes: 0

Anatoliy Orlov
Anatoliy Orlov

Reputation: 469

This is OpenCV 3.1 bug. You could disable OpenCL support as workaround. Details is here https://github.com/Itseez/opencv/issues/6055

Upvotes: 1

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