Channel refined directional color filter array interpolation.

In this paper, our proposed method has two contributions to demosaicking: first, different from conventional interpolation methods based on two directions or four directions, the proposed method exploits to a greater degree correlations among neighboring pixels along eight directions to improve the interpolation performance. Second, we propose an efficient post-processing method to reduce interpolation artifacts based on the color difference planes. As compared with the latest demosaicking algorithms, experiments show that the proposed algorithm provides superior performance in terms of both objective and subjective image qualities.