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A Hough transform based approach to polyline approximation of object boundaries

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3 Author(s)
A. K. Gupta ; Dept. of Electron. & Electr. Commun. Eng., Indian Inst. of Technol., Kharagpur, India ; S. Chaudhury ; G. Parthasarathy

A technique is presented for obtaining a polygonal approximation of object contours directly from the edge images. The technique is based on a new formulation of the Hough transform (HT) for aggregation of edge points into line segments. The space requirement of the HT is brought down by considering a different parameterization of straight lines. In this method, the process of edge linking and boundary approximation are combined into a single algorithm. Consequently, the scheme is computationally more efficient than the classical boundary approximation techniques which require use of a separate edge linking algorithm. Experimental results highlight the effectiveness of this method for approximating object boundaries of polygonal as well as curved shapes present in the images of complex multi-object scenes

Published in:

Proceedings., 11th IAPR International Conference on Pattern Recognition. Vol. III. Conference C: Image, Speech and Signal Analysis,

Date of Conference:

30 Aug-3 Sep 1992