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Proceedings Paper

Determination of the curvature of surfaces and surface profiles
Author(s): D. J. Amalraj; Kumar Eswaran; N. Sundararajan
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Paper Abstract

A specification of the curvatures at all points determines the surface of an object uniquely except for a translation and a rotation. The aim of this study is to determine the curvatures at different points on various objects in the scene. This is done by a lighting arrangement, wherein the surface of objects are illuminated by a source of light beams which pass through a reference grid structure. The distance information is obtained by finding the intersection points between the lines backprojected from the image to the object and lines projected from the reference grid. The curvature of the surface at a point is calculated by using the information regarding the relative distances of the grid lines as seen on the object around the point. The surface is now uniquely determined as both distance information and curvature is known for different points on the surface. The method presented can be used to obtain the 'curvature image' for machine vision and object recognition applications.

Paper Details

Date Published: 1 August 1990
PDF: 11 pages
Proc. SPIE 1251, Curves and Surfaces in Computer Vision and Graphics, (1 August 1990); doi: 10.1117/12.19764
Show Author Affiliations
D. J. Amalraj, Bharat Heavy Electricals Ltd. (India)
Kumar Eswaran, Bharat Heavy Electricals Ltd. (India)
N. Sundararajan, Bharat Heavy Electricals Ltd. (India)

Published in SPIE Proceedings Vol. 1251:
Curves and Surfaces in Computer Vision and Graphics
Leonard A. Ferrari; Rui J. P. de Figueiredo, Editor(s)

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