Keyphrases
- linear discriminant analysis
- latent dirichlet allocation
- face recognition
- topic models
- training data
- news articles
- discriminant analysis
- topic discovery
- topic modeling
- news stories
- dimensionality reduction
- generative model
- social media
- hot topics
- online news
- dimension reduction
- null space
- feature extraction
- news video
- manually labeled
- discriminating power
- support vector
- supervised learning
- computer vision
- co occurrence
- latent variable models
- topic detection
- training set
- news items
- principal component analysis
- semi supervised learning
- lda model
- social networks