1. On space–time interest points;Laptev;Int. J. Comput. Vision,2005
2. Behavior recognition via sparse spatio-temporal features;Dollar,2005
3. Evaluation of local spatio-temporal features for action recognition;Wang,2009
4. Learning realistic human actions from movies;Laptev,2008
5. A spatio-temporal descriptor based on 3D-gradients;Klaser,2008