CFA-demosaicking has been explored for years and the existing approaches can be divided into heuristic or reconstruction ones. Here two methods (POCS and MRF) in the reconstruction category are presented
main reference: [1] Gunturk, B. K., Glotzbach, J., Altunbasak, Y., Schafer, R. W., & Mersereau, R. M. (2005). Demosaicking: color filter array interpolation. IEEE Signal processing magazine, 22(1), 44-54. [2] Gunturk, B. K., Altunbasak, Y., & Mersereau, R. M. (2002). Color plane interpolation using alternating projections. IEEE transactions on image processing, 11(9), 997-1013. [3] Mukherjee, Jayanta, R. Parthasarathi, and S. Goyal. "Markov random field processing for color demosaicing." Pattern Recognition Letters 22.3-4 (2001): 339-351.