基于结构光投影的三维指纹特征提取方法
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陕西科技大学电气与信息工程学院 陕西 西安 710021,陕西科技大学电气与信息工程学院 陕西 西安 710021

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TN911.73

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The feature extraction method of three-dimensional fingerprints based on Structured Light Projection
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    摘要:

    现有三维指纹特征提取均是将三维指纹转换为二维再提取指纹特征,一方面,造成的形变问题与现有的二维指纹数据库不可兼容;另一方面,三维重建和三维转换二维的过程计算量大且复杂。提出把三维指纹调制的二维变形条纹归一化基频模作为三维指纹特征的方法,该方法通过将正弦光栅条纹投射到三维指纹表面上得到被其调制的变形条纹,利用小波变换的时频特性滤波并提取该变形条纹的基频,最终将归一化基频模作为三维指纹的特征。实验仿真结果表明该特征具有较好的识别率,验证了该方法的有效性与可行性。

    Abstract:

    The existing method of three-dimensional(3d )fingerprint feature extraction is to convert 3d fingerprint to two-dimensional(2d) fingerprint which result in not mapping with the existing 2d fingerprint database for the deformation problem on the one hand, the processing is complex and large calculating during reconstruction and transition 3d fingerprint on the other hand. Proposing by using normalization fundamental frequency mode of 2d deformation stripes which is modulated by 3d fingerprint as the 3d fingerprint characteristic. Acquiring the deformation stripes which is modulated through sinusoidal grating stripes projecting to 3d fingerprint; Using the time-frequency characteristics of wavelet transform to filter and extract the fundamental frequency of the deformation stripes; Finally, regarding normalized fundamental frequency mode as the 3d fingerprint feature points. The simulation results of the experiment shows that the feature has a good recognition rate, verifying the effectiveness and feasibility of the method.

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吕岑,朱欢敏. 基于结构光投影的三维指纹特征提取方法[J]. 科学技术与工程, 2014, 14(27): .
Lv Cen,朱欢敏. The feature extraction method of three-dimensional fingerprints based on Structured Light Projection[J]. Science Technology and Engineering,2014,14(27).

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历史
  • 收稿日期:2014-04-04
  • 最后修改日期:2014-04-30
  • 录用日期:2014-05-15
  • 在线发布日期: 2014-09-24
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