Keyphrases
- face hallucination
- image super resolution
- principal component analysis
- face images
- low resolution
- sparse representation
- face recognition
- high resolution
- super resolution
- principal components analysis
- feature space
- principal components
- dimensionality reduction
- feature extraction
- low resolution face images
- linear discriminant analysis
- pairwise
- image restoration
- edge preserving
- random projections
- discriminant analysis
- dimension reduction
- image registration
- dictionary learning
- high quality
- test images
- facial expressions
- high dimensional
- kernel regression
- data sets