[SciPy-User] Large Memory usage while doing median filter

[Joe P Ninan]

Hi,
I was trying median_filter in scipy.ndimage.filters
on a 1024x1024 array.

What I noticed is that the memory requirement grows really fast when we
increase the size of the median filter.
On a machine with 6gb RAM I could do only (150,150) size filter.
Anything above gives Memory Error.

On a bigger server I could see it takes about 16gb RAM while using a filter
size (200, 200)

I can understand, computation time increasing with size of filter, but why
is the memory size exploding with respect to size of the median filter?
Is this expected behaviour?

-cheers
joe
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Joe Philip Ninan
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DAA,  TIFR,
Mumbai, India.
Ph: +917738438212
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