Paper title:

Extracting ridges of topographic surfaces using scanline algorithm

Published in: Issue 2, (Vol. 3) / 2009
Publishing date: 2009-10-20
Pages: 20-27
Author(s): Chang Sukmoon
Abstract. The ridge/valley-like structures of a topographic surface have been extensively studied in image processing to obtain useful skeleton-like shape descriptors. In this paper, we propose a novel method that rapidly constructs the graph representation of the skeletons of the curvilinear objects such as vascular networks and fingerprints. The method first constructs the topographic surface of a given image in such a way that the ridges of the surface reflect the medial axis of the objects in the image. The ridge points are then identified using two orthogonal scanlines and connected by tracing the maximum gradient paths on the surface. We present the very promising results of the method applied to various binary and grayscale images to demonstrate its correctness and robustness.
Keywords: Ridges, Skeletonization, Scanline Algorithm
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