Augmented Reality, Virtual Reality, and Computer Graphics 6th International Conference, AVR 2019, Santa Maria al Bagno, Italy, June 24-27, 2019, Proceedings, Part I - De Paolis, Lucio Tommaso; De Paolis, Lucio Tommaso; Bourdot, Patrick; Bourdot, Patrick (Springer International Publishing : Imprint: Springer, 2019)