Boundary detection of optic disk by a modified ASM method

被引：83

作者：

Li, HQ

Chutatape, O

机构：

[1] Natl Univ Singapore, Sch Comp, Dept Comp Sci, Singapore 117543, Singapore

[2] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

来源：

PATTERN RECOGNITION | 2003年 / 36卷 / 09期

关键词：

optic disk; ASM; PCA; boundary detection; fundus image;

D O I：

10.1016/S0031-3203(03)00052-9

中图分类号：

TP18 [人工智能理论];

学科分类号：

081104 ; 0812 ; 0835 ; 1405 ;

摘要：

A new algorithm to automatically detect the boundary of optic disk in color fundus images is proposed. The optic disk is located by principal component analysis (PCA) based model, which is employed to initialize active shape model (ASM) to detect the disk boundary. ASM is modified with two aspects: one is the self-adjusting weight in the transformation from shape space to image space; the other is exclusion of outlying points in obtaining shape parameters. The modifications make the proposed algorithm more robust and converge faster than the original ASM method, especially in the case where the edge of optic disk is weak or occluded by blood vessels. (C) 2003 Pattern Recognition Society. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：2093 / 2104

页数：12

共 14 条

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