Keyphrases
- illumination conditions
- partial occlusion
- lighting conditions
- imaging conditions
- viewpoint
- illumination variations
- light source
- face recognition
- varying illumination
- single image
- input image
- changing illumination
- image representation
- computer vision
- image classification
- image features
- illumination change
- reflectance properties
- template matching
- image processing
- viewing geometry
- specular reflection
- wide range
- feature extraction
- feature space
- image retrieval
- feature selection
- support vector machine
- human faces
- machine learning
- feature points