arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1502.00478cs.CV
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用于鲁棒人脸识别的结构遮挡编码

Structured Occlusion Coding for Robust Face Recognition

South China University of Technology(华南理工大学);Peking University(北京大学);Shenzhen University(深圳大学)

Yandong Wen, Weiyang Liu, Meng Yang, Yuli Fu, Youjun Xiang, Rui Hu

摘要:

人脸识别中的遮挡问题是一个常见而又具有挑战性的问题。虽然基于稀疏表示的分类(SRC)已被证明在实验室条件下(即无噪声或随机像素损坏)有前途的性能,但它在实际情况下表现得更差。在本文中,我们考虑实际的人脸识别问题,其中的遮挡是可预测的,可用于采样。我们提出了结构化遮挡编码(SOC)来解决遮挡问题。这里的结构化编码有两个方面。一方面,我们采用结构化的字典进行识别。另一方面,我们建议在这个公式中使用结构稀疏性。具体而言,SOC同时分离遮挡和分类的图像。通过这种方法,将遮挡图像的识别问题转化为在附加遮挡的字典上寻找结构化稀疏解的问题。为了构造一个性能良好的遮挡字典,我们提出了一个遮挡掩模估计技术通过局部约束字典(LCD),显示在遮挡样本的显着改善。在一个特定类别的遮挡字典,我们取代规范稀疏与结构稀疏,这是更强大的,进一步提高我们的方法的鲁棒性。此外,SOC在处理现实世界中的大遮挡方面取得了显着改善。在公开数据集上进行了大量的实验,验证了该算法的优越性。

英文摘要:

Occlusion in face recognition is a common yet challenging problem. While sparse representation based classification (SRC) has been shown promising performance in laboratory conditions (i.e. noiseless or random pixel corrupted), it performs much worse in practical scenarios. In this paper, we consider the practical face recognition problem, where the occlusions are predictable and available for sampling. We propose the structured occlusion coding (SOC) to address occlusion problems. The structured coding here lies in two folds. On one hand, we employ a structured dictionary for recognition. On the other hand, we propose to use the structured sparsity in this formulation. Specifically, SOC simultaneously separates the occlusion and classifies the image. In this way, the problem of recognizing an occluded image is turned into seeking a structured sparse solution on occlusion-appended dictionary. In order to construct a well-performing occlusion dictionary, we propose an occlusion mask estimating technique via locality constrained dictionary (LCD), showing striking improvement in occlusion sample. On a category-specific occlusion dictionary, we replace norm sparsity with the structured sparsity which is shown more robust, further enhancing the robustness of our approach. Moreover, SOC achieves significant improvement in handling large occlusion in real world. Extensive experiments are conducted on public data sets to validate the superiority of the proposed algorithm.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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