Shape descriptors based on intersection consistency and global binary patterns

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2012

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Sivri, Erdal

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Shape description is an important problem in computer vision because most vision tasks that require comparing or matching visual entities rely on shape descriptors. In this thesis, two novel shape descriptors are proposed, namely Intersection Consistency Histogram (ICH) and Global Binary Patterns (GBP). The former is based on a local regularity measure called Intersection Consistency (IC), which determines whether edge pixels in an image patch point towards the center or not. The second method, called Global Binary Patterns, represents the shape in binary along horizontal, vertical, diagonal or principal directions. These two methods are extensively analyzed on several databases, and retrieval and running time performances are presented. Moreover, these methods are compared with methods such as Shape Context, Histograms of Oriented Gradients, Local Binary Patterns and Fourier Descriptors. We report that our descriptors perform comparable to these methods.

Subject Keywords

Form perception., Pattern perception., Pattern recognition systems., Computer vision.

URI

http://etd.lib.metu.edu.tr/upload/12614780/index.pdf
https://hdl.handle.net/11511/21978

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

E. Sivri, “Shape descriptors based on intersection consistency and global binary patterns,” M.S. - Master of Science, Middle East Technical University, 2012.