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7.1 Morfologi untuk Pengolahan Citra : Thickening, Skeleton

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Presentation on theme: "7.1 Morfologi untuk Pengolahan Citra : Thickening, Skeleton"— Presentation transcript:

1 7.1 Morfologi untuk Pengolahan Citra : Thickening, Skeleton

2 Thickening Thickening -the morphological dual of thinning -Denote by
The structuring element with the same form as those shown in thinning, but with all 1’s and 0’s interchanged.

3 Thickening However a separate algorithm for thickening is seldom used in practices, instead, the usual procedure is to thin the background, and then complement the result. Give A, get C=Ac, thin C, and then get Cc. This procedure may result in some disconnected points, usually it follows by a simple postprocessing step to them.

4 Skeletons

5 Skeletons Skeletons -Define in terms of erosions and openings
-Denote by: Sk(A)=(AkB)- (AkB) ◦B (A kB)=(…(A B) B) …) B) K=max{k|(A B) } K is the last iterative step before A erodes to an empty set. Also, A can be reconstructed from these subsets:

6 Skeletons Error in the book: Chinese edition page 442
or English edition page 545

7 Skeletons MATLAB code: y=bwmorph(x,’skel’,inf); Skeletons.m
Binary fingerprint image Skeleton image MATLAB code: y=bwmorph(x,’skel’,inf); Skeletons.m

8 Summary Dilation, Erosion, Opening, Closing, Skeletons, Boundary extraction Region filling Thinning, Thickening Convex hull Pruning

9 Summary

10 Summary

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12 Summary

13 Daftar Pustaka Kadir, Abdul, Susanto,A., “Pengolahan Citra, Teori Dan Aplikasi”, Andi, Yogyakarta, 2013.


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