Keyphrases
- sparse representation
- image classification
- image representation
- test images
- reconstruction error
- piecewise smooth
- sparse coding
- dictionary learning
- multiscale
- image features
- face recognition
- single image
- image segmentation
- basis vectors
- input image
- image matching
- high dimensional data
- compressive sensing
- image data
- image retrieval
- sparse reconstruction
- sparse coefficients
- object tracking
- neural network
- image patches
- signal processing
- random projections
- image regions
- negative matrix factorization
- knn
- fourier domain
- image processing
- joint optimization
- feature selection
- data sets