基于MATLAB的指纹识别系统设计

基于MATLAB的指纹识别系统设计

摘要

生物识别技术已经成为身份识别和网络安全的发展技术之一，其中指纹识别技术是目前公认的安全，准确，方便的身份认证技术之一，使之成为人们研究的热点。

本文主要设计一个基于matlab 的指纹识别系统。首先主要介绍了指纹识别技术研究的背景，意义，及现状。其次，实现了指纹识别系统，描述了指纹识别系统的基本结构，并且对指纹图像的预处理、特征提取、特征匹配这三个必要的环节的算法进行了详细地研究，在指纹图像预处理阶段，本文使用基于灰度的算法对图像进行了分割，同时，针对二值化后图像中仍存在的噪声，也进行了相应的修整处理，尽可能的为以后指纹特征的提取打好基础，从而成功地实现了对指纹数字图像的处理、特征提取、保存和匹配等功能。最后，对指纹识别系统进行了仿真，仿真结果表明该系统可以较好的进行识别，准确率达到了95.1%。

关键词：指纹识别；预处理；二值化；特征提取；特征匹配

Abstract

Biometric technology has become one of the developing technologies for identity recognition and network security. And fingerprint identification technology is now recognized as one of the most safe, accurate and convenient authentication technologies, and it is a focus for researchers.

This paper designs a matlab-based fingerprint recognition system. The first introduces the fingerprint recognition technology research background, significance, and the status quo. Secondly, to achieve fingerprint identification system, describes the basic structure of the fingerprint identification system, and the fingerprint image preprocessing, feature extraction, feature matching these three essential aspects of the algorithm is studied in detail in the fingerprint image pre-processing stage this article uses an algorithm based on gray image segmentation carried out at the same time, for the image after binarization noise still exists, but also for the corresponding trimming process, as much as possible for the future lay the foundation for fingerprint feature extraction and thus successfully achieved fingerprint digital image processing, feature extraction, storage and matching functions. Finally, the fingerprint identification system for simulation, simulation results show that the system can identify a better accuracy rate reached 95.1%.

Key Words：Fingerprint Recognition；Processing；Binarization；Feature Extraction；Feature Matching

目录

摘要..................................................................................................................................... I Abstract ...................................................................................................................................... I I 1 绪论. (1)

1.1本课题背景和意义 (1)

1.2指纹识别技术研究现状 (1)

1.3本文的章节安排 (2)

2指纹识系统设计 (4)

2.1指纹识别系统设计基本结构 (4)

2.2指纹图像分割 (4)

2.2.1指纹图像分割介绍 (4)

2.2.2 均值方差法 (5)

2.3指纹图像的细化 (6)

2.3.1指纹图像细化的预处理 (6)

2.3.2 指纹图像细化方法计算 (7)

2.4指纹图像的特征提取 (8)

2.4.1 指纹特征提取概述 (8)

2.4.2指纹特征提取和去伪特征 (9)

2.5 指纹图像匹配方法 (10)

2.5.1指纹图像匹配介绍 (10)

2.6本章小结 (11)

3仿真结果及其分析 (12)

3.1仿真结果及分析 (12)

3.2本章小结 (14)

结论 (16)

参考文献 (17)

附录MATLAB程序 (18)

致谢..................................................................................................... 错误!未定义书签。