Efficient salt-and-pepper noise removal

A more efficient two-phase salt-and-pepper noise removal method is proposed. In the first phase, adaptive median filter is used to detect noisy pixels. In the second phase, a minimization problem is solved by global Barzilai and Borwein (GBB) method. Through the improvement on edge-preserving regularization in the second phase, no regularization coefficient need to be chosen, and the parameter a of the edge-preserving potential function, (p(t) = |t|??, can create adaptively. Comparing the results of removing noise, our method is better with much less running time, especially when the noise ratio is high.EI05604-6124