1. Eigenfaces for recognition;Turk,1991
2. Fisherfaces: recognition using class specific linear projection;Belhumeur,1997
3. Face description with local binary patterns: application to face recognition;Ahonen,2006
4. Distinctive image features from scale-invariant keypoints;Lowe,2004
5. Histograms of oriented gradients for human detection;Dalal,2005