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Faster image median filtering [message #76662]

Fri, 24 June 2011 06:48

Deckard++;
Messages: 11
Registered: March 2010

Junior Member

Hi,

I am confronted with a performance issue related to median filtering
of images using the median() function of IDL. I have rather extended
sets (several thousands) of 1500x1500 images, and I need to median
filter each of them. So far I have been using this to filter them

img_filtered = median(img, boxsize)

The problem is that it take ~5 seconds per image for boxsize=15, which
is ok for a few images but really time consuming when considering
thousands of images. I have a few questions:

1- is there a way to speed-up median filtering that I am not aware of?
2- do you know if IDL implementation of 2D median() is the most
efficient?
3- if not, are you aware of a DLM that would implement a faster median
filtering of images?

Thank a lot in advance.

Best regards,

-- Arthur;

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[Message index]

		Faster image median filtering By: Deckard++; on Fri, 24 June 2011 06:48
		Re: Faster image median filtering By: Juggernaut on Tue, 28 June 2011 10:33
		Re: Faster image median filtering By: Deckard++; on Sun, 03 July 2011 06:53
		Re: Faster image median filtering By: wlandsman on Fri, 24 June 2011 15:33
		Re: Faster image median filtering By: Deckard++; on Sun, 03 July 2011 06:54

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