Dynamic sparse coding with smoothing proximal gradient method.
Rakesh ChalasaniJosé C. PríncipePublished in: ICASSP (2014)
Keyphrases
- sparse coding
- gradient method
- dictionary learning
- sparse representation
- natural images
- image classification
- image representation
- unsupervised learning
- negative matrix factorization
- generative model
- signal processing
- linear combination
- image patches
- convergence rate
- image processing
- step size
- denoising
- visual words
- supervised learning
- data points
- multiscale