CONF Heusch_BTAS_2018/IDIAP Pulse-based Features for Face Presentation Attack Detection Heusch, Guillaume Marcel, Sébastien EXTERNAL https://publications.idiap.ch/attachments/papers/2018/Heusch_BTAS_2018.pdf PUBLIC Proceedings of BTAS 2018, special session on Image and Video Forensics in Biometrics 2018