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Zhiqiang FU, Yao ZHAO, Dongxia CHANG, et al., “Subspace Clustering via Block-diagonal Decomposition,” Chinese Journal of Electronics, vol. x, no. x, pp. 1–11, xxxx doi: 10.23919/cje.2022.00.385
Citation: Zhiqiang FU, Yao ZHAO, Dongxia CHANG, et al., “Subspace Clustering via Block-diagonal Decomposition,” Chinese Journal of Electronics, vol. x, no. x, pp. 1–11, xxxx doi: 10.23919/cje.2022.00.385

Subspace Clustering via Block-diagonal Decomposition

doi: 10.23919/cje.2022.00.385
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  • Author Bio:

    Zhiqiang FU received the B.S. degree in Beijing Jiaotong University in 2017. He is currently pursuing the Ph.D. degree in Institute of Information Science, Beijing Jiaotong University. His current research interests include pattern recognition and clustering. (Email: fuzhiqiang1230@163.com)

    Yao ZHAO received the Ph.D. degree from Beijing Jiaotong University (BJTU), China, in 1996. He is currently the Director of the Institute of Information Science, BJTU. His current research interests include image/video coding, digital watermarking and forensics, video analysis and understanding, and artificial intelligence. He serves or served on the Editorial Boards of several international journals, including as an Associate Editor of the IEEE TRANSACTIONS ON CYBERNETICS and IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, a Senior Associate Editor of the IEEE SIGNAL PROCESSING LETTERS, and an Area Editor of Signal Processing: Image Communication. He was named as a Distinguished Young Scholar by the National Science Foundation of China in 2010. He was also elected as a Chang Jiang Scholar of the Ministry of Education of China in 2013. (Email: yzhao@bjtu.edu.cn)

    Dongxia CHANG received the M.S. degree in mathematics from Xidian University and the Ph.D. degree in control science and engineering from Tsinghua University in 2003 and 2009, respectively. She is currently a professor of the Institute of Information Science of Beijing Jiaotong University. Her research interests include clustering, pattern recognition, and image segmentation. (Email: dxchang@bjtu.edu.cn)

    Yiming WANG received the B.Eng degree in computer science and technology from the Shandong Normal University, Jinan, China, in 2017, and the MA.Eng degree in electronics and communications engineering from Beijing Jiaotong University, Beijing, China, in 2019. He is currently working toward the PH.D. degree in the school of computer and information technology at Beijing Jiaotong University. His current research interests include clustering analysis and deep learning. (Email: wangym@bjtu.edu.cn)

  • Corresponding author: E-mail: yzhao@bjtu.edu.cn
  • Available Online: 2024-03-13
  • The subspace clustering has been addressed by learning the block-diagonal self-expressive matrix. This block-diagonal structure heavily affects the accuracy of clustering but is rather challenging to obtain. In this paper, a novel and effective subspace clustering model, i.e., Subspace Clustering via Block-diagonal Decomposition (SCBD), that can simultaneously capture the block-diagonal structure and gain the clustering result is proposed. In our model, a strict block-diagonal decomposition is introduced to directly pursue the k block-diagonal structure corresponding to k clusters. In this novel decomposition, the self-expressive matrix is decomposed into the block indicator matrix to demonstrate the cluster each sample belongs to. Based on the strict block-diagonal decomposition, the block-diagonal shift is proposed to capture the local intra-cluster structure, which shifts the samples in the same cluster to get smaller distances and results in more discriminative features for clustering. Extensive experimental results on synthetic and real databases demonstrate the superiority of SCBD over other state-of-the-art methods.
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