Compressed dictionary learning for detecting activations in fMRI using double sparsity.
Shuangjiang LiHairong QiPublished in: GlobalSIP (2014)
Keyphrases
- dictionary learning
- sparse representation
- sparsity constraints
- functional magnetic resonance imaging
- sparse coding
- activation patterns
- group sparsity
- face recognition
- image classification
- data analysis
- human brain
- high dimensional
- image representation
- high dimensional data
- signal processing
- image patches
- object category recognition
- dimensionality reduction
- compressive sensing
- generative model
- small number
- negative matrix factorization
- similarity measure
- image processing