Orientation and anisotropy of multi-component shapes from boundary information

PATTERN RECOGNITION

卷:44

Article

Rosin, Paul L.¹  Zunic, Jovisa^2,3 

[1] Cardiff Univ, Sch Comp Sci, Cardiff CF24 3AA, S Glam, Wales

[2] Univ Exeter, Dept Comp Sci, Exeter EX4 4QF, Devon, England

[3] Serbian Acad Arts & Sci, Math Inst, Belgrade, Serbia

关键词: Shape;    Compound shape;    Orientation;    Anisotropy;    Image processing;    Early vision;   

DOI  :  10.1016/j.patcog.2011.02.018

来源: Elsevier

【 摘 要 】

We define a method for computing the orientation of compound shapes based on boundary information. The orientation of a given compound shape S is taken as the direction a that maximises the integral of the squared length of projections, of all the straight line segments whose end points belong to particular boundaries of components of S to a line that has the slope a. Just as the concept of orientation can be extended from single component shapes to multiple components, elongation can also be applied to multiple components, and we will see that it effectively produces a measure of anisotropy since it is maximised when all components are aligned in the same direction. The presented method enables a closed formula for an easy computation of both orientation and anisotropy. (C) 2011 Elsevier Ltd. All rights reserved.

【 授权许可】

Free