Journal of Shanghai Jiao Tong University (Science) ›› 2018, Vol. 23 ›› Issue (5): 657-665.doi: 10.1007/s12204-018-1960-7

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GNN-CRC: Discriminative Collaborative Representation-Based Classification via Gabor Wavelet Transformation and Nearest Neighbor

ZHANG Yanghao (张洋豪), ZENG Shaoning (曾少宁), ZENG Wei (曾威), GOU Jianping (苟建平)   

  1. (1. School of Information Science and Technology, Huizhou University, Huizhou 516007, Guangdong, China; 2. College of Computer Science and Communication Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China)
  • 出版日期:2018-10-01 发布日期:2018-10-07
  • 通讯作者: ZENG Shaoning (曾少宁) E-mail:zsn@hzu.edu.cn

GNN-CRC: Discriminative Collaborative Representation-Based Classification via Gabor Wavelet Transformation and Nearest Neighbor

ZHANG Yanghao (张洋豪), ZENG Shaoning (曾少宁), ZENG Wei (曾威), GOU Jianping (苟建平)   

  1. (1. School of Information Science and Technology, Huizhou University, Huizhou 516007, Guangdong, China; 2. College of Computer Science and Communication Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China)
  • Online:2018-10-01 Published:2018-10-07
  • Contact: ZENG Shaoning (曾少宁) E-mail:zsn@hzu.edu.cn

摘要: Collaborative representation-based classification (CRC) is a distance based method, and it obtains the original contributions from all samples to solve the sparse representation coefficient. We find out that it helps to enhance the discrimination in classification by integrating other distance based features and/or adding signal preprocessing to the original samples. In this paper, we propose an improved version of the CRC method which uses the Gabor wavelet transformation to preprocess the samples and also adapts the nearest neighbor (NN) features, and hence we call it GNN-CRC. Firstly, Gabor wavelet transformation is applied to minimize the effects from the background in face images and build Gabor features into the input data. Secondly, the distances solved by NN and CRC are fused together to obtain a more discriminative classification. Extensive experiments are conducted to evaluate the proposed method for face recognition with different instantiations. The experimental results illustrate that our method outperforms the naive CRC as well as some other state-of-the-art algorithms.

关键词: face recognition, collaborative representation, Gabor wavelet transformation, nearest neighbor (NN), image classification

Abstract: Collaborative representation-based classification (CRC) is a distance based method, and it obtains the original contributions from all samples to solve the sparse representation coefficient. We find out that it helps to enhance the discrimination in classification by integrating other distance based features and/or adding signal preprocessing to the original samples. In this paper, we propose an improved version of the CRC method which uses the Gabor wavelet transformation to preprocess the samples and also adapts the nearest neighbor (NN) features, and hence we call it GNN-CRC. Firstly, Gabor wavelet transformation is applied to minimize the effects from the background in face images and build Gabor features into the input data. Secondly, the distances solved by NN and CRC are fused together to obtain a more discriminative classification. Extensive experiments are conducted to evaluate the proposed method for face recognition with different instantiations. The experimental results illustrate that our method outperforms the naive CRC as well as some other state-of-the-art algorithms.

Key words: face recognition, collaborative representation, Gabor wavelet transformation, nearest neighbor (NN), image classification

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