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. Author manuscript; available in PMC: 2013 Jul 5.
Published in final edited form as: Int J Multimed Inf Retr. 2012 Jul 8;2(2):103–115. doi: 10.1007/s13735-012-0015-3

Table 1.

Besl–Jain surface characterization

Label Category H K
1 Peak surface H < 0 K > 0
2 Ridge surface H < 0 K = 0
3 Saddle ridge surface H < 0 K < 0
4 Plane surface H = 0 K = 0
5 Minimal surface H = 0 K < 0
6 Saddle valley H > 0 K < 0
7 Valley surface H > 0 K = 0
8 Cupped surface H > 0 K > 0