Title :
A new method of estimating shape from shading by using a constraint at zero-crossings of image brightness
Author :
Atsuta, Kiyoaki ; Sangworasil, Manas ; Kondo, Shozo
Author_Institution :
Dept. of Commun. Eng., Tokai Univ., Hiratsuka, Japan
Abstract :
An iterative method is proposed for estimating shape from shading using a constraint of surface orientation at the zero-crossings of the image brightness. This method can be applied to objects with concave surfaces and one can obtain several different 3D shapes from the same shading information. The ∇2G filter (a Gaussian operator) is used to detect the zero-crossings of the image brightness, which given information about curvature change of the surface
Keywords :
filtering and prediction theory; iterative methods; pattern recognition; picture processing; ∇2G filter; 3D shapes; Gaussian operator; concave surfaces; image brightness; iterative method; pattern recognition; picture processing; shape estimation; shape-from-shading estimation; surface orientation; zero-crossings; Additive noise; Boundary conditions; Brightness; Constraint theory; Equations; Image reconstruction; Iterative methods; Reflectivity; Shape; Surface reconstruction;
Conference_Titel :
Pattern Recognition, 1988., 9th International Conference on
Conference_Location :
Rome
Print_ISBN :
0-8186-0878-1
DOI :
10.1109/ICPR.1988.28322
