Can anyone help me with this problem?
I need to create a convolution mask that will emboss a rectangular button. I am having real trouble figuring out how to do this. The following masks have not worked for me:
-1 -2 -1
0 0 0
1 2 1
-1 0 0
0 0 0
0 0 -1
-1 -1 0
-1 0 1
0...
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