Action detection 2 Action recognition 2 Class-distance 2 Classification (of information) 2 Classification performance 2 Complex scenes 2 Data sets 2 Decision trees 2 Detection methods 2 Generalization capability 2 Instance-to-Class distance 2 Interest points 2 Intra-class variation 2 Linear programming 2 Multi-class 2 Mutual informations 2 Nearest neighbor 2 Nearest neighbors 2 Non-parametric classifiers 2 Orders of magnitude 2 Pattern recognition 2 Random forests 2 Search Algorithms 2 Software engineering 2 Spatio-temporal 2 State of the art 2 Subvolumes 2 Training database 2 branch and bound 2 random forest 2