基于MATLAB实现的指纹图像预处理

Fingerprint proprocessing algorithm based on Matlab

指纹图像的质量相对于指纹识别而言非常关键,但实际操作中获取到的图像往往包含各种噪声,比如伤疤、汗渍、污迹以及与指纹采集设备的不均匀接触.在前人的基础上提出了一套基于Matlab实现的指纹识别预处理算法.本文给出了用Matlab对每个指纹图像处理功能模块的算法实现、改进方法及处理结果,主要包括分割、归一化、增强和细化等.用Matlab实现的这种方法,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处理算法的效果,有效配合了算法的研究.实验证明,用Matlab实现的算法处理结果比较理想,满足识别的应用性.

The quality of fingerprint image is essential to fingerprint recognition, but in practice the images obtained are always corrupted by various noises, such as scars, humidity, dirt, and non-uniform contact with the fingerprint capture device. Based on the fomer researches, this paper gives a fingerprint preprocessing algorithm by means of Matlab. It provides the relative algorithms, improvement and experiment results of every module, mainly including segmentation, normalisation, enhancement and thinning. The tool Matlab can effectively test these algorithms and display direct results of processing steps cooperating algorithm research well. It proves that the algorithm results realized by Matlab are ideal, and can meet the requirements of fingerprint recognition.