How to Return an IplImage Array in opencv

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I want to create an image array using IplImage.Here is my code for that.But it provides some memory leaks.Please help me with this to solve this problem.

C++

IplImage *result[200];  

for(int i=0;i<160;i++)
{
    result[i]=cvCreateImage(cvGetSize(Segimg), 8, 1);
}

*result=method();

cvNamedWindow("B:");
cvShowImage("B:", result[1]);
cvWaitKey(0);
cvDestroyWindow("B:");
cvReleaseImage(&result[1]);

Posted 25-May-13 4:06am

123ezone

Updated 25-May-13 5:26am

Volynsky Alex

v4

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Santhosh G_ 25-May-13 10:11am

Please provide code of method()

2 solutions

Solution 2

*result=method();

produces the same effect of

result[0]=method();

Hence you are basically overwriting result[0] pointer without releasing the pointed memory.

Posted 25-May-13 4:30am

CPallini

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123ezone 26-May-13 4:01am

I want to create an array of images using opencv(IplImage) and the size of the array depends on input image.So initially I don't know the size.Can I create that array like this.

IplImage *result[];

And if I want to initialize the image set, since I don't knw the size how can I do that.Can I do it like this?

for(int i=0;i<.....;i++){
result[i]=cvCreateImage(cvGetSize(img), 8, 1);
}

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Santhosh G_ · Accepted Answer · 2013-05-25T04:27:00

Solution 1

C#

for(int i=0;i<160;i++)
{
    result[i]=cvCreateImage(cvGetSize(Segimg), 8, 1);
}

Here 160 images are allocated and assigned to result[0] to result[159].

C++

*result=method();

Here result[0] is overwritten with address returned from method.
If result[0] is not properly deleted by calling cvReleaseImage, it will create memory leak.

And all allocated images should be deleted by calling cvReleaseImage like this.

C#

for(int i=0;i<160;i++)
{
    cvReleaseImage(&result[i]);
}

Posted 25-May-13 4:27am

Santhosh G_

Updated 25-May-13 4:34am

v2

Comments

123ezone 26-May-13 5:20am

I want to create an array of images using opencv(IplImage) and the size of the array depends on input image.So initially I don't know the size.Can I create that array like this.
IplImage *result[];
And if I want to initialize the image set, since I don't knw the size how can I do that.Can I do it like this?
for(int i=0;i<.....;i++)
{
result[i]=cvCreateImage(cvGetSize(img), 8, 1);
}

Santhosh G_ 26-May-13 5:34am

If size is unknown, Use dynamic data structures like list or vector, and add each items as you needed.

But here you can allocate the array before for loop. Isn't it ?