how to use function colfilt?

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satish thapaliya
satish thapaliya 2012-11-30
I want to filter an image by using non linear spatial filters. I used the command colfilt(I,[3 3],'sliding',fun 'parameter'); I am confused what does parameter mean here. i used w=fspecial('laplacian',0) to replace the parameter by w. but it still doesn't work. any help?

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Image Analyst
Image Analyst 2012-11-30
编辑：Image Analyst 2012-11-30
I don't know - it's just unnecessarily complicated so I never use it. I don't think it's needed. Whatever it does, it doesn't do anything that's not done easier with simple to understand functions like conv2, imfilter, nlfilter, or blockproc.

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