Multi-Dictionary Based Collaborative Representation: With Applications to 3D Ear and 3D Palmprint Identification

Table 1

Various surface types determined by signs of curvatures.

	Peak	Ridge	Saddle Ridge
	(ST = 1)	(ST = 2)	(ST = 3)
	None	Flat	Minimal Surface
	(ST = 4)	(ST = 5)	(ST = 6)
	Pit	Valley	Saddle Valley
	(ST = 7)	(ST = 8)	(ST = 9)