采用局部搜索的快速视盘检测方法  

Fast Optic Disc Detection by Local Searching

作　　者：赵圆圆[1] 张东波[1,2] 刘茂[1] 

机构地区：[1]湘潭大学信息工程学院,湖南湘潭411105 [2]智能计算与信息处理教育部重点实验室(湘潭大学),湖南湘潭411105

出　　处：《光电工程》2014年第3期28-34,共7页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(60835004);湖南省教育厅资助科研项目(10B109);湖南省科技厅资助项目(2012FJ3113);湖南省重点学科建设项目

摘　　要：可靠、有效的视盘定位对自动眼底病变分析具有重要意义。本文提出一种快速自动定位视盘方法,首先基于梯度和亮度信息提取视盘的候选区域点;然后利用血管在视盘区域分布非常集中并且沿垂直方向延伸,对候选点进行匹配滤波最终定位视盘点。本文方法在五个公开的眼底图像数据库1 540幅图像上进行了测试,其中1 514幅眼底图像定位成功,准确率达到了98.3%,STARE图像平均处理时间为6.3 s,在所有正常和病变眼底图像测试中表现出良好的鲁棒性。Reliable and efficient Optic Disc （OD） localization is significant to automatic retinal image diagnosis. A fast automatic OD localization algorithm is presented. First, candidate OD locations are identified by gradient and intensity information. Then, by observation, the main vasculature are converged in OD region and spread along vertical direction. A template is used to locate the true OD center. The algorithm was tested on five publicly-available databases. The OD was successfully located in 1 514 images out of 1 540 images （98.3%）. The averaged time for one STARE image is only 6.3 second. And the proposed method shows good robustness in both normal and diseased images.

关 键 词：眼底图像 视盘检测 滤波 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]