模板投票和多方向融合的近红外指静脉识别

Template voting and multi-directional fusion for near-infrared finger vein recognition

  • 摘要: 针对近红外光下采集的指静脉图像存在局部像素相似性强、单一方向识别效果差的问题,提出模板投票和多方向融合的指静脉识别方法。首先,提出基于模板投票的局部三值模式(template voting local three pattern, TVTP),充分利用局部多邻域点的信息,减少局部像素相似性;其次,指静脉图像中含有丰富的方向特征信息,提出多方向编码(multi-directional coding, MDC),获取图像中具有辨别力的方向特征,加强不同方向特征之间的鲁棒性,解决单一方向识别率差的问题;最后,利用分块直方图统计特征,并使用协同表示(collaborative representation, CR)进行分类,提高识别效率。实验结果证明,所提方法在SDUMLA数据集、USM数据集和THU-FVFDT2数据集上的识别率分别达到99.32%、99.73%和99.75%,与其他经典和新颖算法相比,不仅取得了更好的识别效果,还能同时满足实时性要求,具有应用价值。

     

    Abstract: Aiming at the problems of strong local pixel similarity and poor recognition effect in a single direction of finger vein images collected under near-infrared light, a finger vein recognition method based on template voting and multi-directional fusion was proposed. Firstly, the template voting local three pattern (TVTP) was proposed to fully use the information of local multi-neighborhood points and reduce local pixel similarity. Secondly, based on the rich directional feature information contained in finger vein images, the multi-directional coding (MDC) was proposed to acquire directional features with image discernment, strengthen the robustness between different directional features, and solve the problem of poor recognition rate of a single direction. Finally, the block histogram was used for statistical features and collaborative representation (CR) was used to improve the recognition efficiency. The experimental results show that the recognition rate of the proposed method on the SDUMLA dataset, USM dataset, and THU-FVFDT2 dataset reaches 99.32%, 99.73%, and 99.75%, respectively. Compared with other classical and novel algorithms, the proposed method achieves better recognition effects, meets real-time requirements, and has application values.

     

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