Dictionary learning with ℓ1/2 regularizer for sparsity based on proximal operator.
Zhenni LiShuxue DingYujie LiWuhui ChenPublished in: iCAST (2015)
Keyphrases
- dictionary learning
- sparse representation
- sparsity constraints
- sparse coding
- face recognition
- group sparsity
- image super resolution
- image classification
- high dimensional
- object category recognition
- negative matrix factorization
- image patches
- image representation
- signal processing
- small number
- total variation
- sparse representation based classification
- sparse codes
- test images
- compressive sensing
- high dimensional data
- semi supervised
- natural images
- dimensionality reduction
- input image
- feature space