Keyphrases
- deep structure
- facial expression recognition
- partial occlusion
- recognizing facial expressions
- facial expressions
- multiscale
- scale spaces
- human computer interaction
- visual tracking
- scale space
- local binary pattern
- expression recognition
- mean shift
- object tracking
- phase transition
- human faces
- facial features
- lighting conditions
- critical points
- robust recognition
- face recognition
- feature extraction
- facial images
- illumination variations
- complex background
- pairwise
- video sequences
- viewpoint