Pattern Recognition and Image Analysis 9th Iberian Conference, IbPRIA 2019, Madrid, Spain, July 1-4, 2019, Proceedings, Part II - Morales, Aythami; Morales, Aythami; Fierrez, Julian; Fierrez, Julian; Sánchez, José Salvador; Sánchez, José Salvador; Ribeiro, Bernardete; Ribeiro, Bernardete (Springer International Publishing : Imprint: Springer, 2019)