Gee-Sern Hsu Kai-Hsiang Chang Shih-Chieh Huang Regressive Tree Structured Model for Facial Landmark Localization. 3855-3861 2015 ICCV https://doi.org/10.1109/ICCV.2015.439 https://doi.ieeecomputersociety.org/10.1109/ICCV.2015.439 conf/iccv/2015 db/conf/iccv/iccv2015.html#HsuCH15