Understanding Human Activities Through 3D Sensors Second International Workshop, UHA3DS 2016, Held in Conjunction with the 23rd International Conference on Pattern Recognition, ICPR 2016, Cancun, Mexico, December 4, 2016, Revised Selected Papers - Wannous, Hazem; Wannous, Hazem; Pala, Pietro; Pala, Pietro; Daoudi, Mohamed; Daoudi, Mohamed; Flórez-Revuelta, Francisco; Flórez-Revuelta, Francisco (Springer International Publishing : Imprint: Springer, 2018)