雨后冲刷后罪犯残缺指纹痕迹检验及细节增强方法研究

发布时间：2018-05-24 23:06

本文选题：指纹识别 + 身份认证　；参考：《科技通报》2017年09期

【摘要】：指纹识别是生物特征识别方式中的一类,它已经成为验证身份最为有效的方法之一。因此文中利用该技术对雨后冲刷后罪犯的残缺指纹进行检测,提出基于残缺区域方向的指纹重建方法。首先,针对指纹残缺区域范围中存在脊线中断和细节特征点缺失的情况,先利用融合邻域中的细节特征点和指纹方向信息对指纹残缺部分进行预估,通过先知经验结合预估方向对指纹预估部分进行脊线修补,同时引进信息熵确定指纹重建修复最佳方案;然后,对于指纹残缺的奇异部分,根据指纹纹线存在固定方向和频率的特性,对其局部指纹图像进行时频分析,采用概率统计方式对纹线频率值范围进行判定,构造频域滤波器实现带通滤波从而达到对指纹细节增强的目的。实验证明,运用文中指纹重建法对残缺指纹进行了有效检验及细节增强。
[Abstract]:Fingerprint recognition is one of the biometric identification methods, and it has become one of the most effective methods to verify identity. Therefore, the technique is used to detect the incomplete fingerprints of criminals after rain scouring, and a fingerprint reconstruction method based on the direction of incomplete regions is proposed. First of all, aiming at the problem of ridge interruption and detail feature point missing in the region of fingerprint incomplete, the detail feature points and fingerprint direction information in the fused neighborhood are used to predict the missing part of fingerprint. The ridge of the fingerprint prediction is repaired by the experience of the prophet combined with the direction of prediction, and the best scheme of fingerprint reconstruction is determined by introducing information entropy. Then, for the singular part of the fingerprint incomplete, According to the characteristic of fixed direction and frequency of fingerprint line, the local fingerprint image is analyzed by time-frequency analysis, and the range of frequency value of fingerprint line is determined by probability and statistics. The frequency domain filter is constructed to realize the bandpass filter to enhance the fingerprint details. Experimental results show that the method of fingerprint reconstruction in this paper is used to verify and enhance the detail of incomplete fingerprint effectively.
【作者单位】：河南警察学院;
【分类号】：D918.91;TP391.41

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