Keyphrases
- pose variations
- face images
- low resolution
- face recognition
- active appearance models
- human faces
- high resolution
- keypoints
- facial images
- high resolution images
- illumination variations
- facial expressions
- super resolution
- feature vectors
- feature extraction
- image super resolution
- face databases
- principal component analysis
- facial features
- illumination conditions
- random forests
- feature points
- recognition rate
- lighting conditions
- data sets
- single image
- computational complexity
- image features
- viewpoint