Keyphrases
- dictionary learning
- sparse representation
- norm minimization
- sparse coding
- face recognition
- image super resolution
- image classification
- group sparsity
- signal processing
- object category recognition
- sparse codes
- high dimensional data
- image representation
- objective function
- natural images
- test images
- regularization term
- dimensionality reduction
- unsupervised learning
- image patches
- denoising
- ground truth
- bayesian networks
- learning algorithm