Zhang-Suen thinning algorithm: Difference between revisions
→{{header|J}}: use semi tacit adverb
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frameImg=: 0 ,. 0 , >:@$ {. ] NB. adds border of 0's to image
neighbrs=:
Bdry=: 1 2 5 8 7 6 3 0 1 NB. map pixel index to neighbour order
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