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How to find the neighbourhood of a pixel

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Sivakumaran Chandrasekaran
How to find a particular pixel and the neighbourhood of it?

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Andrei Bobrov
Andrei Bobrov 2012-9-4
编辑：Andrei Bobrov 2012-9-4
try this code (need have Image Processing Toolbox)
I = rand(10) > .9 % initial array
out = imdilate(I,ones(3)) - I;
OR
out = bwmorph(I,'dilate')-I
OR
out = bwdist(I,'chessboard') == 1;

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