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Polygonal Data Comparative Method

IP.com Disclosure Number: IPCOM000014256D
Original Publication Date: 2000-May-01
Included in the Prior Art Database: 2003-Jun-19

Publishing Venue

IBM

Abstract

Disclosed is a system for comparing three-dimensional surface model data by polygonal representation, from the viewpoint of their similarity. The system allows rapid comparison with little calculation when the comparison targets are surface models of thin, plate-shaped objects such as slabs or molded parts of a machine. It also allows the detection of regions in which each of the compared surface models has a different shape. The system consists of three main procedures: 1. Calculate a parameter based on the distance between a reference plane and a sampling point on the surface of the model. 2. Calculate the parameter for each sampling point on each model iteratively, and calculate the sum of the differences between the parameters' values at each pair of sampling point. This summation shows the indifference shape between the compared surface models.