Keyphrases
- sparse representation
- negative matrix factorization
- dictionary learning
- sparse coding
- face recognition
- nonnegative matrix factorization
- regularized least squares
- reconstruction error
- image patches
- signal processing
- image classification
- high dimensional data
- image representation
- compressive sensing
- probabilistic latent semantic analysis
- computer vision
- subspace learning
- sparsity constraints
- dimensionality reduction
- knn
- multiscale
- similarity measure
- image segmentation
- basis vectors
- machine learning
- neural network