Buffer around a value in a matrix.
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Hi I am struggling with building a buffer of values around a specific value in a matrix. For example I have a matrix
A=[ 0 0 0 0 1 0 0 1
1 0 0 0 0 1 1 1
0 0 0 0 1 1 1 1
0 0 0 0 1 1 1 0
1 0 0 0 1 1 0 0]
The intended matrix with a square buffer filled by 2 around all cells which are 1 (cells which are adjascent and diagonal). Thanks
B=[ 2 2 0 2 1 2 2 1
1 2 0 2 2 1 1 1
2 2 0 2 1 1 1 1
2 2 0 2 1 1 1 2
1 2 0 2 1 1 2 2]
2 个评论
Jonas
2022-12-8
i guess it should be
B=[ 2 2 0 2 1 2 2 1
1 2 0 2 2 1 1 1
2 2 0 2 1 1 1 1
2 2 0 2 1 1 1 2
1 2 0 2 1 1 2 2]
?
采纳的回答
A=[ 0 0 0 0 1 0 0 1
1 0 0 0 0 1 1 1
0 0 0 0 1 1 1 1
0 0 0 0 1 1 1 0
1 0 0 0 1 1 0 0];
B=imfilter(A,ones(3))
B(B>0)=2
B(A==1)=1
isequal(B,[ 2 2 0 2 1 2 2 1
1 2 0 2 2 1 1 1
2 2 0 2 1 1 1 1
2 2 0 2 1 1 1 2
1 2 0 2 1 1 2 2])
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