balloonSnake(matlab).rar BoundMirrorShrink.m

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function B = BoundMirrorShrink(A)
> Shrink the matrix to remove the padded mirror boundaries
>
> for example
>
> A = [
> 5 4 5 6 12 6
> 2 1 2 3 11 3
> 5 4 5 6 12 6
> 8 7 8 9 13 9
> 5 4 5 6 12 6
> ]
>
> B = BoundMirrorShrink(A) will yield
>
> 1 2 3 11
> 4 5 6 12
> 7 8 9 13

> Chenyang Xu and Jerry L. Prince, 9/9/1999
> http://iacl.ece.jhu.edu/projects/gvf

[m,n] = size(A);
yi = 2:m-1;
xi = 2:n-1;
B = A(yi,xi);