title: Local Solid Shape.
abstract: Local solid shape applies to the surface curvature of small surface patches-essentially regions of approximately constant curvatures-of volumetric objects that are smooth volumetric regions in Euclidean 3-space. This should be distinguished from local shape in pictorial space. The difference is categorical. Although local solid shape has naturally been explored in haptics, results in vision are not forthcoming. We describe a simple experiment in which observers judge shape quality and magnitude of cinematographic presentations. Without prior training, observers readily use continuous shape index and Casorati curvature scales with reasonable resolution.
authors.affiliation: University of Leuven (KU Leuven), Belgium; Faculteit Sociale Wetenschappen, Universiteit Utrecht, The Netherlands.
authors.forename: Jan
authors.initials: J
authors.lastname: Koenderink
authors.affiliation: Faculteit Sociale Wetenschappen, Universiteit Utrecht, The Netherlands.
authors.forename: Andrea
authors.initials: A
authors.lastname: van Doorn
authors.affiliation: University of Leuven (KU Leuven), Belgium.
authors.forename: Johan
authors.initials: J
authors.lastname: Wagemans
keywords: Casorati curvature; shape index; solid shape; surface curvature