A No-Reference Blocking Artifacts Metric Using Selective Gradient and Plainness Measures - Jianhua Chen; Yongbing Zhang; Luhong Liang; Siwei Ma; Ronggang Wang; Wen Gao (Advances in Multimedia Information Processing - PCM 2008, 9th Pacific Rim Conference on Multimedia, Tainan, Taiwan, December 9-13, 2008. Proceedings, 2008)