Facial expression recognition using clustering discriminant Non-negative Matrix Factorization.
Symeon NikitidisAnastasios TefasNikos NikolaidisIoannis PitasPublished in: ICIP (2011)
Keyphrases
- negative matrix factorization
- document clustering
- nonnegative matrix factorization
- spectral clustering
- principal component analysis
- clustering algorithm
- probabilistic latent semantic analysis
- clustering method
- unsupervised feature selection
- sparse representation
- matrix factorization
- k means
- constrained least squares
- text mining
- tensor factorization
- feature extraction
- vector space model
- image segmentation
- machine learning
- unsupervised learning
- cluster analysis
- text documents
- data sets