[Insight-users] Memory usage in WrapITK

[Gaëtan Lehmann]

Le 31 janv. 09 à 06:16, Борис Казаков a écrit :

> Hi,
> I have tested the following example, written in python using wrapitk:
>
> import numpy as np
> import itk
> itk.auto_progress(2)
>
> image_type = itk.Image.F3
> duplicator = itk.ImageDuplicator[image_type].New()
> filter_type = itk.RecursiveGaussianImageFilter[image_type, image_type]
> reader = itk.ImageFileReader[image_type].New()
> reader.SetFileName('/home/borsh/test/im1.jpg')
> for i in range(400):
>     print i
>     ga = filter_type.New()
>     gb = filter_type.New()
>     ga.SetDirection(0)
>     gb.SetDirection(1)
>     ga.SetZeroOrder()
>     gb.SetZeroOrder()
>
>     ga.SetInput(reader.GetOutput())
>     gb.SetInput(ga.GetOutput())
>     duplicator.SetInputImage(gb.GetOutput())
>     gb.Update()
>
> With each iteration of outer loop the memory usage of the python  
> process increases. Am I doing something wrong or is there a memory  
> leak in wrapitk?


Hi,

I think itk.auto_progress() can cause memory leaks - it's in my TODO  
list.
Also, garbage collection can cause a memory increase in python,  
because the filters are not immediately destroyed. A good practice is  
to avoid instantiating a filter in a loop, but rather reusing an  
existing filter in that loop.

Regards,

Gaëtan

-- 
Gaëtan Lehmann
Biologie du Développement et de la Reproduction
INRA de Jouy-en-Josas (France)
tel: +33 1 34 65 29 66    fax: 01 34 65 29 09
http://voxel.jouy.inra.fr  http://www.mandriva.org
http://www.itk.org  http://www.clavier-dvorak.org

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