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memory leak in loop

asked 2012-11-17 08:18:05 -0500

KFP gravatar image

updated 2012-11-17 10:28:43 -0500

sammy gravatar image

I'm using a simple for loop to do X itterations of the same filter:

void filterwrapper(IplImage *src, IplImage **dst, int filter_sel,
      int param1, int param2, int iterations) 
{
    int i;
    *dst = cvCloneImage(src);
    .
    .
    .
    for (i = 0; i < iterations; i++)
    {
        cvSmooth( *dst, *dst, CV_MEDIAN, param1, 0);
    }
}

I'm aware i somehow have to release the memory using cvReleasimg(), but doing so inside the loop causes my program to crash. I've tried using a temporary image (IplImage *tmp) as a placeholder and releasing this each loop, but i still get an memory allocation error when running the program.

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Your code is correct elsewhere there is an error.

Mostafa Sataki gravatar imageMostafa Sataki ( 2012-11-17 11:24:23 -0500 )edit

thx for your repply. switcing from cvCloneImage to cvCopy cleared the issue

KFP gravatar imageKFP ( 2012-11-18 11:51:05 -0500 )edit

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answered 2012-11-19 01:56:58 -0500

SR gravatar image

From the doc:

Median and bilateral filters work with 1- or 3-channel 8-bit images and can not process images in-place.

You must use different matrices for input and output, e.g. cvSmooth(*src, *dst, CV_MEDIAN, param1, 0);

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In OpenCV 2.4 In-place operation is supported for both

Mostafa Sataki gravatar imageMostafa Sataki ( 2012-11-19 02:04:25 -0500 )edit
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Asked: 2012-11-17 08:18:05 -0500

Seen: 760 times

Last updated: Nov 19 '12