Tensor Completion via Convolutional Sparse Coding Regularization
This work provides an incremental improvement for researchers and practitioners dealing with incomplete tensor data, particularly in scenarios where detailed information recovery is crucial.
This paper addresses the problem of missing values in tensor data by proposing two novel methods, LRTC-CSC-I and LRTC-CSC-II, which combine Low-Rank Tensor Completion (LRTC) with Convolutional Sparse Coding (CSC) regularization. The proposed methods aim to recover both low-rank and high-frequency detailed information, outperforming state-of-the-art methods in quantitative evaluations.
Tensor data often suffer from missing value problem due to the complex high-dimensional structure while acquiring them. To complete the missing information, lots of Low-Rank Tensor Completion (LRTC) methods have been proposed, most of which depend on the low-rank property of tensor data. In this way, the low-rank component of the original data could be recovered roughly. However, the shortcoming is that the detail information can not be fully restored, no matter the Sum of the Nuclear Norm (SNN) nor the Tensor Nuclear Norm (TNN) based methods. On the contrary, in the field of signal processing, Convolutional Sparse Coding (CSC) can provide a good representation of the high-frequency component of the image, which is generally associated with the detail component of the data. Nevertheless, CSC can not handle the low-frequency component well. To this end, we propose two novel methods, LRTC-CSC-I and LRTC-CSC-II, which adopt CSC as a supplementary regularization for LRTC to capture the high-frequency components. Therefore, the LRTC-CSC methods can not only solve the missing value problem but also recover the details. Moreover, the regularizer CSC can be trained with small samples due to the sparsity characteristic. Extensive experiments show the effectiveness of LRTC-CSC methods, and quantitative evaluation indicates that the performance of our models are superior to state-of-the-art methods.