Detection and measurement of retinal vessels, in fundus images using amplitude modified second-order Gaussian filter
Detection and measurement of retinal vessels, in fundus images using amplitude modified second-order Gaussian filter
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DOI：
10.1109/10.979356
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发表时间：
2002-02-01
影响因子：
4.6
通讯作者：
Krishnan, SM
中科院分区：
文献类型：
--
作者：
Gang, L;Chutatape, O;Krishnan, SM
本文评估了用高斯函数估计血管轮廓的适应度，并提出了一种修正幅度的二阶高斯滤波器用于血管的检测和测量。仿真和实验表明，当滤波器的幅值系数适当分配时，可以测量出与匹配滤波器的“扩展因子”成线性关系的容器宽度。由于图像总是与系统相关，因此通常需要使用预校准线来确定容器直径的绝对值。实验表明，在检测过程中包含宽度测量可以改善匹配滤波器的性能，并显着提高检测成功率。
In this paper, the fitness of estimating vessel profiles with Gaussian function is evaluated and an amplitude-modified second-order Gaussian filter is proposed for the detection and measurement of vessels. Mathematical analysis is given and supported by a simulation and experiments to demonstrate that the vessel width can be measured in linear relationship with the "spreading factor" of, the matched filter when the magnitude coefficient of the filter is suitably assigned. The absolute value of vessel diameter can be determined simply by using a precalibrated line, which is typically required since images are always system dependent The experiment shows that the inclusion of the width measurement in the detection process can improve the performance of matched filter and result in a significant increase in success rate of detection.