Unsupervised Discovery of Action Hierarchies in Large Collections of Activity Videos.
Parvez AhammadChuohao YeoKannan RamchandranShankar S. SastryPublished in: MMSP (2007)
Keyphrases
- human activities
- human actions
- action recognition
- action classification
- human activity recognition
- recognizing human actions
- motion history images
- activity recognition
- group activities
- recognition of human actions
- recognizing actions
- video segments
- document collections
- view invariant
- video sequences
- human motion
- video database
- video clips
- digital libraries
- video content
- space time
- atomic actions
- video frames
- digital photos
- human computer interaction
- space time interest points
- information retrieval
- action sequences
- data sets
- temporal structure
- video analysis
- video surveillance
- hierarchical structure
- information retrieval systems
- search engine