Advances in multimedia information processing – PCM 2018 19th Pacific-Rim Conference on Multimedia, Hefei, China, September 21-22, 2018 : proceedings : part II - Hong, Richang; Cheng, Wen-Huang; Yamasaki, Toshihiko; Wang, Meng; Ngo, Chong-Wah (Lecture notes in computer science, 2018)