Categorize shape indices into a nine point scale.
0 = Spherical Cup
1 = Trough
2 = Rut
3 = Saddle Rut
4 = Saddle
5 = Saddle Ridge
6 = Ridge
7 = Dome
8 = Spherical Cap
From Koenderink, J.J. and Van Doorn, A.J., 1992.
[KvD92]
- Parameters:
shapeindex (list) – List of shape indices.
- Returns:
shape – List of shape categories.
- Return type:
list
