[1] Li Y Q, Li Y J, Li H B et al. Fusion of global and local various feature for facial expression recognition[J]. Acta Optica Sinica, 34, 0515001(2014).
[4] Hu M, Jiang H, Wang X H et al. A hierarchical classification method of expressions based on geometric and texture features[J]. Acta Electronica Sinica, 45, 164-172(2017).
[5] Wang X H, Li R J, Hu M et al. Occluded facial expression recognition based on the fusion of local features[J]. Journal of Image and Graphics, 21, 1473-1482(2016).
[6] Saito Y, Kenmochi Y, Kotani K. Estimation of eyeglassless facial images using principal component analysis. [C]// Conference on Image Processing, 4, 197-201(1999).
[8] Chen Z, Hou Y Y, Xu J C. Sign determination and error analysis of phase extraction based on principle component analysis[J]. Chinese Journal of Lasers, 43, 0108002(2016).
[9] Ghiasi G, Fowlkes C C. Occlusion coherence: localizing occluded faces with a hierarchical deformable part model. [C]// Proceedings of IEEE Conference on Computer Vision and Pattern Recognition, 1899-1906(2014).
[13] Liu S S, Zhang Y, Liu K P. Facial expression recognition under partial occlusion based on Weber local descriptor histogram and decision fusion. [C]// Proceedings of the 33rd Chinese Control Conference, 4664-4668(2014).
[14] Zhao G P, Shen Y P, Wang J Y. Adaptive feature fusion object tracking based on circulant structure with Kernel[J]. Acta Optica Sinica, 54, 0815001(2017).
[17] Gong D, Li S, Xiang Y. Face recognition using the Weber local descriptor. [C]// Proceedings of the first Asian Conference on Pattern Recognition, 589-592(2011).
[18] Naika C L S, Das P K, Nair S B. Asymmetric region local binary pattern operator for person-dependent facial expression recognition. [C]// Proceedings of 2012 International Conference on Computing, Communication and Applications, 1-5(2012).
[19] Hu M, Cheng Y H, Wang X H et al. Facial expression recognition based on asymmetric region local gradient coding[J]. Journal of Image and Graphics, 20, 1313-1321(2015).
[20] Xia J, Pei D, Wang Q H et al. Face recognition based on local adaptive ternary derivative pattern coupled with Gabor feature[J]. Laser & Optoelectronics Progress, 53, 111004(2016).
[21] Tan X Y, Chen S C, Li J et al. Learning non-metric partial similarity based on maximal margin criterion. [C]// Proceedings of 2006 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 138-145(2006).
[22] Lv Y D, Feng Z Y, Xu C. Facial expression recognition via deep learning. [C]// Proceedings of International Conference on Smart Computing, 303-308(2014).