HMM-based visual speech recognition using intensity and location normalization. - Oscar Vanegas; Akiji Tanaka; Keiichi Tokuda; Tadashi Kitamura (ICSLP, 1998)

Location Normalization of HMM-Based Lip Reading: Experiments for the M2VTS Database. - Oscar Vanegas; Keiichi Tokuda; Tadashi Kitamura (ICIP (2), 1999)