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A new safe-point thinning algorithm based on the mid-crack code tracing

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2 Author(s)
F. Y. Shih ; Dept. of Comput. & Inf. Sci., New Jersey Inst. of Technol., Newark, NJ, USA ; Wai-Tak Wong

A new thinning algorithm for binary images, based on the safe-point testing and mid-crack code tracing, is presented. Thinning is treated as the deletion of nonsafe border pixels from the contour to the center of the object layer-by-layer. The deletion is determined by masking a 3×3 weighted template and by the use of lookup tables. The resulting skeleton does not require cleaning or pruning. The obtained skeleton possesses single-pixel thickness and preserves the object's connectivity. The algorithm is very simple and efficient since only boundary pixels are processed at each iteration and lookup tables are used

Published in:

IEEE Transactions on Systems, Man, and Cybernetics  (Volume:25 ,  Issue: 2 )