Table VIII.

The classification of the 8 types of features (SDE, LGI, SDS, convexity, sharpness, thickness, area and volume) based on relative performance and relative irreplaceable contribution.

Class	Description	Feature types
Class I	Relative performance>0, Relative irreplaceable contribution<0	SDE, SDS, Thickness, Area
Class II	Relative performance>0, Relative irreplaceable contribution>0	Convexity, Volume
Class III	Relative performance<0, Relative irreplaceable contribution<0
Class IV	Relative performance<0, Relative irreplaceable contribution>0	LGI, Sharpness