Mixed Gaussian-impulse video noise removal via temporal-spatial decomposition

This paper presents a novel denoising scheme for video sequences corrupted by mixed Gaussian-impulse noise. From a global viewpoint, such a video sequence contains three parts: temporal-spatially correlated video content, uncorrelated dense Gaussian noise, and uncorrelated sparse impulse noise. This fact motivates us to formulate the mixed Gaussian-impulse noise removal task as a temporal-spatial decomposition problem, which amounts to a convex program. A two-stage algorithm is developed to solve this problem efficiently. Effectiveness of the proposed algorithm on mixed Gaussian-impulse noise removal is validated through experiments. The results are satisfactory in both visual quality and PSNR values, while very few prior knowledge of noise statistic is required compared to most state-of-the-art methods.