b49a9302-14af-4017-a65d-0142640dbd8c 382 4 5 false false false 0 0 decimal

Freeman Chain Code of Eight Directions

Reference:

https://www.sci.utah.edu/~gerig/CS7960-S2010/handouts/Kuhl-Giardina-CGIP1982.pdf

C# pChainCode x 0 : y 0 : p 0012 mat : C 01 matrix : lbl 01234567 : 15 mat C# IsString k 1 C# strlen range lbl C# k 1 substr findstr 1 - ≠ C C C# k 1 substr str2num stack eval : if for C C# : if k 1 C length range x x 6 C k el - sign 2 C k el - sign * + eval : y y 4 C k el - sign C k el sign * + eval : p p x y 12 mat stack eval : 31 line for p 41 line :

Chain3 5412343001010007711075454506541344446 stack :

Chain5 003107045476445715345041331420600 stack :

23334467665444332677000122325454332215667701014443221104556670003211077334556710007762334445007776 Chain6 Chain6 :

Chain3 pChainCode Chain5 pChainCode Chain6 description pChainCode

Alvaro

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