Sparse dictionary learning by block proximal gradient with global convergence.
Tao ZhuPublished in: Neurocomputing (2019)
Keyphrases
- dictionary learning
- global convergence
- sparse representation
- sparse coding
- convergence rate
- global optimum
- optimization methods
- convergence speed
- group sparsity
- sparse codes
- sparsity constraints
- natural images
- compressive sensing
- dictionary learning for sparse
- image patches
- step size
- generative model
- search space
- negative matrix factorization
- primal dual
- particle swarm
- particle swarm optimization algorithm
- feature space
- low resolution
- image classification