Joint and Direct Optimization for Dictionary Learning in Convolutional Sparse Representation.
Guan-Ju PengPublished in: IEEE Trans. Neural Networks Learn. Syst. (2020)
Keyphrases
- dictionary learning
- sparse representation
- sparse coding
- image classification
- face recognition
- compressive sensing
- group sparsity
- sparse codes
- image patches
- image representation
- signal processing
- natural images
- linear combination
- random projections
- negative matrix factorization
- dimensionality reduction
- information retrieval
- test images
- high dimensional data
- object recognition
- objective function
- feature space
- similarity measure
- unsupervised learning
- facial expressions