摘要
利用已获得的血管网络分割结果,提出了一种基于先验知识的视网膜血管宽度测量方法。该方法结合血管骨架的空间位置信息和方向信息,采用改进的定向局部对比度方法检测出骨架线两侧的血管边界像素,从而计算出骨架线上各像素点的血管直径宽度,实验对不同形态结构的血管段进行了仿真,结果证明了该方法的有效性。
A new method for measurement retinal vessel widths based on prior knowledge is proposed. First, the location information and the direction information of retinal vessel skeleton are extracted from the segmented results. Then the modified directional local contrast method is applied to detect the vessel boundary, and last the width of retinal vessel diameter is obtained by computed. The simulation has been implemented in different morphological structure vascular segments, and the experiment results demonstrate the validity of the method.
基金
高等学校博士学科点专项科研基金项目(WC105002)
国家自然科学基金项目(60872081)
关键词
视网膜血管
血管宽度测量
血管分割
定向局部对比度
retinal blood vessel
vessel width measurement
vessel segmentation
directional local contrast
