Group Direction Difference Chain Codes For The Representation Of The Border

Xiaorong Li; Zhiying Zhu

doi:10.1117/12.976614

22 August 1988 Group Direction Difference Chain Codes For The Representation Of The Border

Xiaorong Li, Zhiying Zhu

Proceedings Volume 0938, Digital and Optical Shape Representation and Pattern Recognition; (1988) https://doi.org/10.1117/12.976614
Event: 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, 1988, Orlando, FL, United States

Abstract

In this paper, a new method of the group direction difference chain code representation is presented which can be used to represent the curves or shape borders, and also can be used for the features extraction of shape borders. The idea of this method is to construct a chain codes based on the Freeman chain codes whose values represent the average changes in direction along the boundary of an any shape. For the sake of overcoming the noise in Freeman chain codes, in this paper the concept of direction smoothing is proposed, and a transform from Freeman chain codes to the direction smoothing chain codes is developed. Finally, the method and algorithm for obtaining the group direction difference chain codes are presented.

Citation Download Citation

Xiaorong Li and Zhiying Zhu "Group Direction Difference Chain Codes For The Representation Of The Border", Proc. SPIE 0938, Digital and Optical Shape Representation and Pattern Recognition, (22 August 1988); https://doi.org/10.1117/12.976614

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