An explicitly-sparse representation for oscillatory kernels with wave atom-like functions.
Yanchuang CaoJun LiuDawei ChenPublished in: J. Comput. Phys. (2024)
Keyphrases
- sparse representation
- dictionary learning
- sparse coding
- image classification
- compressive sensing
- face recognition
- reconstruction error
- regularized least squares
- negative matrix factorization
- joint optimization
- compressed sensing
- image patches
- image representation
- high dimensional data
- kernel function
- piecewise smooth
- signal processing
- sparsity constraints
- random projections
- sparse learning
- sparse reconstruction
- sparse coefficients
- sparse approximations
- reproducing kernel hilbert space
- kernel methods
- test images
- unsupervised learning
- norm minimization
- dimensionality reduction
- probabilistic model
- pattern recognition
- multiscale
- feature extraction