Total variation regularized iterative back-projection method for single frame image super resolution

Iterative back-projection (IBP) technique is commonly used to minimize the super resolution (SR) reconstruction error and acquire a high spatial resolution image with appealing visual effect. However, the IBP based SR method suffers from the chessboard and ringing effect around edges. In this paper, we employ total variation (TV) as a part of penalty function to minimize the reconstruction error, which helps to avoid across-edge smoothing and suppress the above-mentioned artifacts simultaneously. The experimental results validate that the proposed algorithm can promote the SR reconstruction precision considerably.