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Re: Filter image with moving window and averaging pixels [message #52439 is a reply to message #52344]

Wed, 31 January 2007 12:23

Jean H.
Messages: 472
Registered: July 2006

Senior Member

David Fanning wrote:
> rpertaub@gmail.com writes:
>
>
>> I need to filter some noise out of an image and was pointed towards
>> making a moving/sliding window (size, say 7x7) and compare the center
>> pixel with surrounding pixels right next to border (ignoring middle
>> pixels). And compare the value of center pixel with the border average
>> pixels and thus filter out noise. However, I am not sure how to do
>> this.
>> Anyone has any idea?
>> Did I say I was new to IDL...?
>> Thanks for all your help,
>> my last query was met by very helpful replies, and I am grateful!
>
>
> I think I would start with SMOOTH, or perhaps MEDIAN,
> and then let us know how you are getting on. :-)
>
> Cheers,
>
> David

... these 2 functions seems to be considering the pixels adjacent to the
center one... 'rp' wants to leave a gap of one pixel between the center
one and the ones used for the computation...

Jean

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[Message index]

		Re: Filter image with moving window and averaging pixels By: Jean H. on Wed, 31 January 2007 11:52
		Re: Filter image with moving window and averaging pixels By: Jean H. on Wed, 31 January 2007 11:48
		Re: Filter image with moving window and averaging pixels By: David Fanning on Wed, 31 January 2007 11:55
		Re: Filter image with moving window and averaging pixels By: Jean H. on Wed, 31 January 2007 12:23

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