sliding window
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How to apply a 3x3 sliding window for an image while the pixel in the center of the window should have the mean value of the window.
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Ben Mitch
il 22 Mag 2011
I think you're after filter2(). Try
mn = filter2(ones(3), im);
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Image Analyst
il 12 Giu 2011
But that's exactly what Ben, Jan, and Sean de's code does! Did you look up the help for filter2()? It is basically conv2() (which is highly optimized) with the 'same' option. (I always use conv2 rather than filter2.) Write a test with a small image to convince yourself.
Jan
il 11 Giu 2011
What is "the next 3x3 position"? Will the resulting picture have a width and size reduced by 3? If so, this can achieve the calculation efficiently: FEX: BlockMean
2 Commenti
Image Analyst
il 12 Giu 2011
Patan, how many times do we have to say it. CONV2 AND IMFILTER WILL DO WHAT YOU'RE ASKING!!!!
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