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A new discriminative sparse parameter classifier with iterative removal for face recognition

基于迭代剔除稀疏表示的人脸识别方法

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Abstract

Face recognition has been widely used and developed rapidly in recent years. The methods based on sparse representation have made great breakthroughs, and collaborative representation-based classification (CRC) is the typical representative. However, CRC cannot distinguish similar samples well, leading to a wrong classification easily. As an improved method based on CRC, the two-phase test sample sparse representation (TPTSSR) removes the samples that make little contribution to the representation of the testing sample. Nevertheless, only one removal is not sufficient, since some useless samples may still be retained, along with some useful samples maybe being removed randomly. In this work, a novel classifier, called discriminative sparse parameter (DSP) classifier with iterative removal, is proposed for face recognition. The proposed DSP classifier utilizes sparse parameter to measure the representation ability of training samples straight-forward. Moreover, to avoid some useful samples being removed randomly with only one removal, DSP classifier removes most uncorrelated samples gradually with iterations. Extensive experiments on different typical poses, expressions and noisy face datasets are conducted to assess the performance of the proposed DSP classifier. The experimental results demonstrate that DSP classifier achieves a better recognition rate than the well-known SRC, CRC, RRC, RCR, SRMVS, RFSR and TPTSSR classifiers for face recognition in various situations.

摘要

近年来, 人脸识别得到了广泛应用和快速发展. 以协作表示分类(CRC)算法为代表的基于稀疏 表示的分类方法取得了重大突破. 然而, CRC因不能有效区分相似样本, 从而非常容易分类错误. 作 为CRC的改进方法, 两阶段测试样本稀疏表示方法(TPTSSR)剔除了那些对描述测试样本贡献不大的 训练样本. 但在TPTSSR中, 仅进行一次剔除操作是远远不够的, 因为某些无用样本仍可能被保留下 来, 同时那些有用样本可能会被随机删除. 本文提出一种新的基于迭代剔除判别稀疏表示(DSP)方法, DSP 利用稀疏参数直接度量训练样本的表示能力, 同时通过多次迭代把大部分不相关的样本逐步剔 除, 从而避免误删有效样本. 再通过在不同姿态、表情和噪声下的代表性人脸数据集进行实验, 以评 估DSP 的性能. 大量实验结果表明, 在大部分情况下DSP 比典型的SRC、CRC、RRC、RCR、 SRMVS、RFSR和TPTSSR等算法具有更好的人脸识别效果.

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Correspondence to Meng-ru Luo  (罗孟儒).

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Foundation item

Project(2019JJ40047) supported by the Hunan Provincial Natural Science Foundation of China; Project(kq2014057) supported by the Changsha Municipal Natural Science Foundation, China

Contributors

The overarching research goals were developed by all the authors. TANG De-yan and ZHOU Si-wang provided the concept. TANG De-yan and LUO Meng-ru conducted the literature review and wrote the first draft of the manuscript. LUO Meng-ru analyzed the measured data. CHEN Hao-wen and TANG Hui edited the draft of manuscript. All authors replied to reviewers’ comments and revised the final version.

Conflict of interest

TANG De-yan, ZHOU Si-wang, LUO Meng-ru, CHEN Hao-wen, and TANG Hui declare that they have no conflict of interest.

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Tang, Dy., Zhou, Sw., Luo, Mr. et al. A new discriminative sparse parameter classifier with iterative removal for face recognition. J. Cent. South Univ. 29, 1226–1238 (2022). https://doi.org/10.1007/s11771-022-4995-8

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  • DOI: https://doi.org/10.1007/s11771-022-4995-8

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