Alan Wee-Chung Liew Hong Yan Ngai-Fong Law POCS-based blocking artifacts suppression using a smoothness constraint set with explicit region modeling. 795-800 2005 15 IEEE Trans. Circuits Syst. Video Techn. 6 http://doi.ieeecomputersociety.org/10.1109/TCSVT.2005.848303 db/journals/tcsv/tcsv15.html#LiewYL05