毕业设计（论文）-指纹图像预处理.doc

目录
摘要 II
Abstract III
第一章概述 1
指纹及其识别 1
指纹识别算法概述 1
2
指纹预处理 3
指纹图像预处理过程及一般算法 4
、验证和辨识 5
指纹识别的主要应用 5
7
第二章设计方案 8
平滑处理 8
2, 增强对比度 8
指纹图像规格化和滤波 8
锐化处理 9
二值化 10
细化 11
特征值的提取 12
伪特征点的去除 13
14
第三章 MATLAB软件设计 15
15
程序调试 17
17
18
27
结束语 28
致谢 29
参考文献 30


摘要
指纹图像预处理是指纹识别的前提,它的好坏直接影响到指纹识别的成败,但由于指纹图像降质带来的困难,并根据指纹图像的特征提出了合理的假设,再根据假设提出了增强指纹图像对比度的算法、提取指纹有效区域的算法、根据方向信息分割图像的算法以及去除图像中气泡噪声的算法,这些算法处理效果好,能有效地解决指纹图像的预处理问题。
用Matlab实现这种方法,既能分步对指纹图像预处理算法进行仿真测试,又可以很直观地看到图像预处理算法的效果。实验证明,用Matlab实现的处理结果比较理想,满足识别的应用性。本文介绍用matlab实现了指纹图像的对比度增强、有效区域的选取、指纹图像的二值化、指纹的特征值提取等。并选取较好的处理步骤和算法参数解决指纹图像预处理的问题。


关键字指纹图像预处理,二值化,对比度,特征点提取


Abstract
Fingerprint image pre-processing is a prerequisite of fingerprint recognition, it will have a direct impact on the ess of fingerprint recognition, fingerprint image degradation because of the difficulties caused by the characteristics of fingerprint images based on reasonable assumptions made, and made under the assumption that contrast enhancement algorithm for fingerprint images, fingerprint extraction algorithm effective area, according to the direction of the image segmentation algorithm and the information to remove noise in the image bubble algorithms deal with the effect, It can effectively solve the problem of fingerprint image preprocessing.
Every part of fingerprint images preprocessing algorithms can be simulated and testd by matlab,and the effect of images processing algorithms can be observed experimental results show that Matlab can get ideal processing result,and can meet the requirement of introduce the use of matlab to achieve a fingerprint image contrast enhancement, the effective selection of the region, the fingerprint image binarization in this text. And to select the best of processing steps and algorithm parameters to solve t