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An improved rotation-invariant thinning algorithm

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1 Author(s)
Rockettt, P.I. ; Dept. of Electron. & Electr. Eng., Univ. of Sheffield, UK

Ahmed and Ward [Sept. 1995] have recently presented an elegant, rule-based rotation-invariant thinning algorithm to produce a single-pixel wide skeleton from a binary image. We show examples where this algorithm fails on two-pixel wide lines and propose a modified method which corrects this shortcoming based on graph connectivity.

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Pattern Analysis and Machine Intelligence, IEEE Transactions on  (Volume:27 ,  Issue: 10 )