期刊
IMAGE AND VISION COMPUTING
卷 27, 期 7, 页码 864-875出版社
ELSEVIER
DOI: 10.1016/j.imavis.2008.02.013
关键词
Retinal vascular graph; Artery; Vein; Constraint satisfaction problem; Constraint propagation
The vascular structure of the retina consists of two kinds of vessels: arteries and veins. Together these vessels form the vascular graph. In this paper, we present an approach to separate arteries and veins based on a pre-segmentation and a few hand-labelled vessel segments. We use a rule-based method to propagate the vessel labels through the vascular graph. The anatomical characteristics of the vessels on the retina are modelled as a dual constraint graph. We embed this task as double-layered constrained search problem steered by a heuristical AC-3 algorithm to overcome the NP-hard computational complexity. Results are presented on vascular graphs generated from manual as well as on automatical segmentation. (C) 2008 Elsevier B.V. All rights reserved.
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