三维重建指纹特征提取分析的刑事案件数字化侦破

本文在二维指纹识别技术的基础上,结合多目摄像头数据模型进行指纹采集的三维重建。采用指纹特征点坐标场和方向场进行表征,利用二维指纹特征点的空间映射来获得三维指纹特征点空间特征坐标,由局部四邻域法计算坐标方向场,在指纹匹配中,基于双参考点法进行指纹的空间特征点对齐,由欧氏距离和方向夹角进行特征点配对。实验结果表明,本文提出的指纹三维重建技术以及指纹特征点的提取和匹配,能够最大限度获取三维指纹特征信息,保证指纹特征识别精度,为刑事案件侦破提供有力的技术支持。

Analysis of Fingerprint Feature Extraction Based on 3D Reconstruction Technique

Based on the two-dimensional fingerprint identification technology,the three-dimensional reconstruction of fingerprint acquisition is carried out by combining the multi-eye camera data model.The coordinate field and direction field of fingerprint feature point are characterized by using the spatial mapping of two-dimensional fingerprint feature points to obtain the spatial feature coordinates of three-dimensional fingerprint feature points.In fingerprint matching,the spatial feature points of fingerprint are aligned based on double reference point method,and the feature points are matched by Euclidean distance and direction angle.The experiment results show that the 3D fingerprint reconstruction technology and the extraction and matching of fingerprint feature points can obtain the 3D fingerprint feature information to the maximum extent and ensure the accuracy of fingerprint feature recognition.