一种基于灰度级相位的指纹图像增强方法  

Fingerprint Image Enhancement Approach Based on Gray-level Phase

作　　者：佟喜峰[1] 刘雪梅[2] 李盼池[1] 韩玉祥[1] 尹晓喆[1] 肖红[1] 李鹏飞[1] 

机构地区：[1]东北石油大学,大庆163318 [2]北京城市学院,北京100083

出　　处：《计算机系统应用》2012年第6期205-207,共3页Computer Systems & Applications

基　　金：黑龙江省教育厅科学技术研究项目(11551017)

摘　　要：图像增强是指纹识别系统中非常重要的一个步骤。本文提出了灰度级相位的概念,并实现了一个根据灰度级相位增强指纹图像的方法。该方法首先计算指纹区域内每个像素点的灰度级相位,然后对灰度级相位进行滤波,最后根据滤波后的灰度级相位构建指纹图像。测试结果表明该方法对低质量的指纹图像增强效果好。Image enhancement is an important procedure in an automatic fingerprint recognition system. An item called gray-level phase is defined, and a gray-level phase based image enhancement approach is proposed. In this approach, gray-level phase of each pixel is obtained firstly; then a filter is designed for gray-level phase; finally, the enhanced image is obtained according to the filtered gray-level phase. The experimental results show that the proposed approach is promising for low quality fingerprint image.

关 键 词：指纹识别 图像增强 灰度级相位 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]