Disconnected skeletons for shape recognition

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Date

2005

Author

Aslan, Çağrı

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This study presents a new shape representation scheme based on disconnected symmetry axes along with a matching framework to address the problem of generic shape recognition. The main idea is to define the relative spatial arrangement of local symmetry axes in a shape centered coordinate frame. The resulting descriptions are invariant to scale, rotation, small changes in viewpoint and articulations. Symmetry points are extracted from a surface whose level curves roughly mimic the motion by curvature. By increasing the amount of smoothing on the evolving curve, only those symmetry axes that correspond to the most prominent parts of a shape are extracted. The representation does not suffer from the common instability problems of the traditional connected skeletons. It captures the perceptual properties of shapes well. Therefore, finding the similarities and the differences among shapes becomes easier. The matching process is able to find the correct correspondence of parts under various visual transformations. Highly successful classification results are obtained on a moderate sized 2D shape database.

Subject Keywords

General.

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http://etd.lib.metu.edu.tr/upload/12606071/index.pdf
https://hdl.handle.net/11511/15091

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

Ç. Aslan, “Disconnected skeletons for shape recognition,” M.S. - Master of Science, Middle East Technical University, 2005.