摘要
针对计算机辅助虹膜诊断中卷缩轮提取问题,提出基于最大能量和提取虹膜卷缩轮的方法。在规一化的虹膜图像中,定义整个灰度梯度为水平灰度梯度和垂直方向梯度之和,通过在整个规一化图像中搜索最大灰度梯度和曲线,卷缩轮的提取问题转变为求最大灰度梯度和问题,实验结果表明该方法的可行性与有效性。
To solve the problems ofcollarette extraction in the computer-aided iridology system, a method for collarette extraction based on the max sum of gray gradient is proposed. In the normalized iris image, the total gray gradient is defined as the sum of the horizontal direction gray gradient and vertical gray gradient. The collarette extraction problem is changed to maximum value of the total gray gradient in the normalized iris image. The experimental result shows the feasibility and validity using the maximum sum of total gray gradient for collarette extraction.
出处
《计算机工程与设计》
CSCD
北大核心
2008年第9期2290-2292,共3页
Computer Engineering and Design
基金
国家自然科学基金项目(90209020)
关键词
图像处理
虹膜诊断
特征提取
图像规一化
高斯滤波
image processing
iridology
feature extraction
image normalization
Gauss filter
