problem of applying block processing function

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mahesh chathuranga
mahesh chathuranga 2013-9-20
my image is gray scale image of 100*120. my programme is
*fun=@(x) x.*2;
B = blkproc(I,[4 4],[1 1],fun);*
when i'm looking for 1st sub block it gives only a single number, it equals to the twice of (1,1) pixel value of original image. can't i get the twice of 1st 4*4 block.is it possible or not.

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Image Analyst
Image Analyst 2013-9-20
It gives a single number but you can multiply by ones(blockSize) to expand it. See the attached demos scripts.
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Image Analyst
Image Analyst 2013-9-25
You must have a really, really old version of MATLAB. It had a different name back then, something like blkproc, blkprc, or something like that. You need to find out what it's called in your ancient version of MATLAB. Or just upgrade.
mahesh chathuranga
mahesh chathuranga 2013-9-25
I,m working with R2009a,it uses blkproc. but is there any method in matlab to find the old codes.

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