[ITK-users] Memory leak in Python wrapped Image GetPixel method?

[Matt McCormick]

Hi Lassi,

Thanks for investigating and reporting the issue!

I have created an issue in the Issue Tracker to keep track of it:

  https://issues.itk.org/jira/browse/ITK-3352

Matt

On Mon, Mar 9, 2015 at 6:11 AM, Paavolainen, Lassi
<lassi.paavolainen at jyu.fi> wrote:
> Hi,
>
> I noticed that GetPixel method in itk.Image object eats memory in Python wrapped code. I think I've seen some Python wrapping memory issues years ago but nothing as simple as this. Here is a simple test script:
> import sys
> import itk
> reader = itk.ImageFileReader.IUC2.New()
> reader.SetFileName(sys.argv[1])
> reader.Update()
> img = reader.GetOutput()
> size = img.GetLargestPossibleRegion().GetSize()
> for i in range(100):
>         for x in range(size[0]):
>                 for y in range(size[1]):
>                         value = img.GetPixel((x,y))
>         print "Done with iteration %d"%(i+1)
>
> When I run it with 1 MB image, it end up taking 1.5 GB of memory. After spending lots of time on debugging a bigger bunch of code I realized that the GetPixel method was to blame. Can anyone reproduce it? I'm using ITK 4.6.1
>
> Cheers,
> Lassi
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