Keyphrases
- sparse representation
- image segmentation and object recognition
- dictionary learning
- sparse coding
- image classification
- face recognition
- image segmentation
- orthogonal matching pursuit
- signal processing
- compressive sensing
- compressed sensing
- preprocessing step
- computer vision
- object tracking
- random projections
- joint optimization
- image patches
- negative matrix factorization
- dimensionality reduction
- image representation
- regularized least squares
- sparse reconstruction
- high dimensional data
- piecewise smooth
- test images
- sparsity constraints
- bag of words
- norm minimization
- single image
- data sets
- sparse coefficients
- multiscale