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cvReleaseImage throws exception

asked 2013-05-31 09:29:28 -0500

Marian gravatar image

I created an image by capturing camera simple:

IplImage *img;
CvCapture *capture = cvCreateCameraCapture(0);
CvSize size = cvSize(1920, 1080);
cvSetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH , size.width);
cvSetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT , size.height);
img = cvQueryFrame(capture);
cvNamedWindow("VideoTest", CV_WINDOW_AUTOSIZE);
cvShowImage("VideoTest", img);
cvReleaseImage(&img);

The problem is cvReleaseImage throws a memory exception. It cannot deallocate memory for image. How can I fix it?

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answered 2013-05-31 10:03:56 -0500

berak gravatar image

updated 2013-05-31 10:08:33 -0500

yes, you should cvReleaseImage() all images you create,

but the image you get from the videocapture is the one exception to that rule. ( it hasn't got own memory, but uses mem inside the driver ) so don't release that!

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Or just switch to the C++ openCV2.0 API and stop worrying about allocating and releasing memory yourself :)

StevenPuttemans gravatar imageStevenPuttemans ( 2013-05-31 12:50:52 -0500 )edit
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answered 2013-05-31 10:10:33 -0500

Prasanna gravatar image

Hey there Marian,

I am not able to reproduce your error on my computer. Can you please post your error details? It would be helpful to debug.

Regards, Prasanna S

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Asked: 2013-05-31 09:29:28 -0500

Seen: 1,177 times

Last updated: May 31 '13