Keyphrases
- low resolution
- face images
- pose variations
- face recognition
- keypoints
- cmu pie
- high resolution
- multi pie
- human faces
- illumination variations
- principal component analysis
- facial expressions
- face databases
- feature extraction
- recognition rate
- feature points
- illumination conditions
- face recognition algorithms
- face analysis
- object recognition
- local binary pattern
- image matching
- image features
- facial images
- sparse representation
- computer vision
- image retrieval
- wide range
- face detection
- multiscale
- viewpoint