Tensor GMRES and Golub-Kahan Bidiagonalization methods via the Einstein product with applications to image and video processing

05/15/2020

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by   M. El Guide, et al.

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In the present paper, we are interested in developing iterative Krylov subspace methods in tensor structure to solve a class of multilinear systems via Einstein product. In particular, we develop global variants of the GMRES and Gloub–Kahan bidiagonalization processes in tensor framework. We further consider the case that mentioned equation may be possibly corresponds to a discrete ill-posed problem. Applications arising from color image and video restoration are included.