“…On the other hand, the tensor T-product introduced by Kilmer [21] has been proved to be of great use in many areas, such as image processing [21,29,35,37], computer vision [12], signal processing [7,24,25], low rank tensor recovery and robust tensor PCA [23,24], data completion and denoising [16,25,38]. An approach of linearization is provided by the T-product to transfer tensor multiplication to matrix multiplication by the discrete Fourier transformation and the theories of block circulant matrices [6,19].…”