Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications 23rd Iberoamerican Congress, CIARP 2018, Madrid, Spain, November 19-22, 2018, Proceedings - Vera-Rodriguez, Ruben; Vera-Rodriguez, Ruben; Fierrez, Julian; Fierrez, Julian; Morales, Aythami; Morales, Aythami (Springer International Publishing : Imprint: Springer, 2019)