改进的加权稀疏表示人脸识别算法
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陕西省科技计划重点项目(2017ZDCXL-GY-05-03)


Improved Weighted Sparse Representation Algorithm for Face Recognition
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    摘要:

    针对传统的加权稀疏表示分类方法在获取训练样本权重以及求解l1范数最小化问题中计算效率低的问题,提出了一种加权稀疏表示和对偶增广拉格朗日乘子法(DALM)相结合的人脸识别算法WSRC_DALM算法.该算法主要采用高斯核函数计算每个训练样本与测试样本之间的相关性,即获得训练样本相对于测试样本的权重;接着利用DALM算法求解l1范数最小化模型,实现测试样本的精准重构和分类,最后在ORL和FEI人脸数据集上进行算法验证.在ORL数据集中,WSRC_DALM算法的识别率高达99%,相比经典的SRC和WSRC算法,识别率分别提高了7%和4.8%,同时计算效率比WSRC算法提高了约20倍;在FEI数据集中,多姿态变化下的人脸识别率接近于92%.实验结果表明,WSRC_DALM算法在识别准确度和计算效率上具有明显的优势,并且对较大类内变化具有较好的鲁棒性.

    Abstract:

    Aiming at the problem of low efficiency in obtaining training sample weights and solving the l1 norm minimization, we proposed a face recognition algorithm WSRC_DALM algorithm, which was combined with Weighted Sparse Representation Classification (WSRC) and Dual Augmented Lagrangian Multiplier method (DALM). In the method, the Gaussian kernel function mainly was used to calculate the correlation between each training sample and the test sample, to obtain training samples with respect to the weight of the test sample. Then, the DALM algorithm was used to solve the l1 norm minimization model, to achieve the test sample accurate reconstruction and classification. Finally, the proposed algorithm was validated by ORL and FEI datasets. In the ORL dataset, the recognition rate of the algorithm is 99%, compared with the classical SRC and WSRC algorithms, the recognition rate is improved by 7% and 4.8% respectively, and the computational efficiency is 20 times higher than WSRC algorithm. And in the FEI dataset, pose-varied face recognition rate is close to 92%. WSRC_DALM algorithm has obvious advantages in recognition accuracy and computational efficiency, and it has good robustness to large intraclass changes.

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王林,邓芳娟.改进的加权稀疏表示人脸识别算法.计算机系统应用,2018,27(6):134-139

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  • 收稿日期:2017-10-02
  • 最后修改日期:2017-10-24
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  • 在线发布日期: 2018-05-29
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