A Dictionary Learning Method for Sparse Representation Using a Homotopy Approach.
Milad NiknejadMostafa SadeghiMassoud Babaie-ZadehHossein RabbaniChristian JuttenPublished in: LVA/ICA (2015)
Keyphrases
- sparse representation
- dictionary learning
- sparse coding
- group sparsity
- image super resolution
- reconstruction error
- test images
- similarity measure
- negative matrix factorization
- image patches
- face recognition
- single image super resolution
- signal processing
- missing data
- probabilistic model
- active learning
- image representation
- feature space
- unsupervised learning
- compressed sensing
- natural images
- input data
- image classification