Keyphrases
- sparse representation
- face recognition
- sparse representation based classification
- image representation
- dictionary learning
- illumination variations
- sparse coding
- face images
- feature extraction
- gabor features
- fisher classifier
- learned dictionary
- local binary pattern
- human faces
- object tracking
- compressive sensing
- sparse approximations
- joint optimization
- facial expressions
- random projections
- compressed sensing
- linear discriminant analysis
- multiscale
- regularized least squares
- computer vision
- image classification
- sparse reconstruction
- face databases
- subspace learning
- feature analysis
- face recognition algorithms
- robust face recognition
- principal component analysis
- signal processing
- face verification
- image features
- image retrieval
- data sets
- fisher linear discriminant
- image patches
- feature selection
- bag of words