Low-rank quaternion tensor completion for recovering color videos and images

PATTERN RECOGNITION

卷:107

Article

Miao, Jifei¹  Kou, Kit Ian¹  Liu, Wankai² 

[1] Univ Macau, Fac Sci & Technol, Dept Math, Macau 999078, Peoples R China

[2] Shandong Univ Finance & Econ, Sch Math & Quantitat Econ, Jinan, Shandong, Peoples R China

关键词: Quaternion;    Color videos;    Color images;    Tensor completion;    Low-rank;   

DOI  :  10.1016/j.patcog.2020.107505

来源: Elsevier

【 摘 要 】

Low-rank quaternion tensor completion method, a novel approach to recovery color videos and images, is proposed in this paper. We respectively reconstruct a color image and a color video as a quaternion matrix (second-order tensor) and a third-order quaternion tensor by encoding the red, green, and blue channel pixel values on the three imaginary parts of a quaternion. Different from some traditional models which treat color pixel as a scalar and represent color channels separately, whereas, during the quaternion-based reconstruction, it is significant that the inherent color structures of color images and color videos can be completely preserved. Under the definition of Tucker rank, the global low-rank prior to quaternion tensor is encoded as the nuclear norm of unfolding quaternion matrices. Then, by applying the ADMM framework, we provide the tensor completion algorithm for any order ( >= 2) quaternion tensors, which theoretically can be well used to recover missing entries of any multidimensional data with color structures. Simulation results for color videos and color images recovery show the superior performance and efficiency of the proposed method over some state-of-the-art existing ones. (C) 2020 Elsevier Ltd. All rights reserved.

【 授权许可】

Free