Towards an Autonomous Vision-Based Unmanned Aerial System against Wildlife Poachers. - Miguel A. Olivares-Méndez; Changhong Fu 001; Philippe Ludivig; Tegawendé F. Bissyandé; Kannan Somasundar; Maciej Zurad; Arun Annaiyan; Holger Voos; Pascual Campoy Cervera (Sensors, 2015)