Spontaneous versus posed smile recognition using discriminative local spatial-temporal descriptors. - Pingping Wu; Hong Liu 008; Xuewu Zhang 003 (ICASSP, 2014)

Regression based landmark estimation and multi-feature fusion for visual speech recognition. - Hong Liu 008; Xuewu Zhang 003; Pingping Wu (ICIP, 2015)

Two-level multi-task metric learning with application to multi-classification. - Hong Liu 008; Xuewu Zhang 003; Pingping Wu (ICIP, 2015)

A Novel Lip Descriptor for Audio-Visual Keyword Spotting Based on Adaptive Decision Fusion. - Pingping Wu; Hong Liu 008; Xiaofei Li 001; Ting Fan; Xuewu Zhang 003 (IEEE Trans. Multim., 2016)

How do you smile? Towards a comprehensive smile analysis system. - Pingping Wu; Hong Liu 008; Chao Xu 006; Yuan Gao 008; Zheyuan Li; Xuewu Zhang 003 (Neurocomputing, 2017)

Spontaneous versus posed smile recognition via region-specific texture descriptor and geometric facial dynamics. - Pingping Wu; Hong Liu 008; Xuewu Zhang 003; Yuan Gao 008 (Frontiers Inf. Technol. Electron. Eng., 2017)