Nonconvex Sparse Representation With Slowly Vanishing Gradient Regularizers.
Eunwoo KimMinsik LeeSonghwai OhPublished in: IEEE Access (2020)
Keyphrases
- sparse representation
- dictionary learning
- sparse coding
- face recognition
- image classification
- compressive sensing
- reconstruction error
- joint optimization
- image patches
- compressed sensing
- negative matrix factorization
- linear combination
- high dimensional data
- low rank matrix recovery
- piecewise smooth
- signal processing
- convex optimization
- dimensionality reduction
- objective function
- random projections
- fidelity term
- test images
- sparse approximations
- sparse reconstruction
- data sets
- sparsity constraints
- machine learning
- total variation
- decision trees
- feature extraction
- higher order