design my own 2d filter

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zhang
zhang 2014-4-10
编辑： zhang 2014-4-10
I'm wondering is there a way to define my own 2d filter. Assuming there is a matrix A, I'd like to assign every element of A to the maximum value of its 8 neighbors. For example:
A = [1 2 3 4 5
6 7 8 9 10
-1 3 4 8 13
4 2 0 9 1]
After filtering:
A = [1 2 3 4 5
6 8 9 10 10
-1 8 9 13 13
4 2 0 9 1]
Thanks

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