Vector minimax concave penalty for sparse representation.
Shibin WangXuefeng ChenWeiwei DaiIvan W. SelesnickGaigai CaiBenjamin CowenPublished in: Digit. Signal Process. (2018)
Keyphrases
- sparse representation
- objective function
- dictionary learning
- sparse coding
- image classification
- reconstruction error
- joint optimization
- object tracking
- compressive sensing
- random projections
- face recognition
- high dimensional data
- signal processing
- image patches
- image representation
- compressed sensing
- negative matrix factorization
- test images
- dimensionality reduction
- regularized least squares
- norm minimization
- piecewise smooth
- machine learning
- sparsity constraints
- small number
- sparse matrix