Image super-resolution via sparse representation over multiple learned dictionaries based on edge sharpness and gradient phase angle.
Faezeh YeganliMahmoud NazzalHüseyin ÖzkaramanliPublished in: Signal Image Video Process. (2015)
Keyphrases
- sparse representation
- image super resolution
- dictionary learning
- sparse coding
- image patches
- image classification
- sparse approximations
- edge detection
- compressive sensing
- class specific
- face recognition
- signal processing
- sparse codes
- high dimensional data
- image representation
- unsupervised learning
- edge preserving
- dimensionality reduction
- low resolution
- test images
- noisy images
- higher order
- image registration
- high quality
- machine learning