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Proceedings Paper

An Efficient Grid-Based Representation Of Arbitrary Object Boundaries
Author(s): Chang Y. Choo
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Paper Abstract

We present an efficient scheme for representing irregular object boundaries which belongs to the grid-based chain coding family. The scheme which is called polycurve codes extends the chain coding family, e.g., chain codes and generalized chain codes, by employing predefined circular-arc segments as boundary approximators in addition to straight-line segments. Each circular-arc segment in polycurve codes is predefined around the associated line segment and labeled as an integer. Polycurve codes enables direct extraction and labeling of high-level line and arc segments from arbitrary boundaries. Once the object boundaries are encoded by poly-curve codes, feature calculation and shape analysis may be done solely based on the look-up table indexed by the integer labels. Experimental results show that polycurve codes improve performance, such as compactness and encoding time, over the existing chain coding family.

Paper Details

Date Published: 27 March 1989
PDF: 11 pages
Proc. SPIE 1002, Intelligent Robots and Computer Vision VII, (27 March 1989); doi: 10.1117/12.960265
Show Author Affiliations
Chang Y. Choo, Worcester Polytechnic Institute (United States)


Published in SPIE Proceedings Vol. 1002:
Intelligent Robots and Computer Vision VII
David P. Casasent, Editor(s)

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