Second-Order Difference
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How can I find the Second-Order Difference signals in diagonal and minor diagonal of a matrix? The matrix is an image. For the horizontal and vertical I suppose this:
Dh = diff(image, 2);
Dv = diff(Image, 2 ,2);
Thanks!
回答（1 个）
bym
2011-9-24
m = magic(4)
Dd = diff(diag(m),2) %diagonal
Dm = diff(diag(rot90(m)),2) %minor diagonal
2 个评论
Bruno Bertini
2011-9-24
bym
2011-9-24
Dh and Dv look correct. I have edited Dm to add the 2 ;)
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2011-9-23
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