Event Detection Based on Nonnegative Matrix Factorization: Ceasefire Violation, Environmental, and Malware Events.
Barry L. DrakeTiffany HuangAshley BeaversRundong DuHaesun ParkPublished in: AHFE (9) (2017)
Keyphrases
- event detection
- nonnegative matrix factorization
- negative matrix factorization
- event recognition
- matrix factorization
- data representation
- least squares
- composite events
- activity recognition
- video event detection
- video analysis
- spectral clustering
- principal component analysis
- complex events
- semantic event detection
- sports video
- objective function
- original data
- video event
- feature extraction
- text categorization
- dimensionality reduction
- training set
- soccer video
- reinforcement learning
- data sets