Shape Measurement and Sketching Systems for Porcelain Using Image Technology

Abstract

This paper describes a system for automatically sketching patterns on the surface of porcelain. For the implementation of sketching on porcelain, we propose a sketching method which uses the numerical control data output from the CAD system. This system comprises two parts. One is a measurement system for the three-dimensional shape of the porcelain piece using the Slit-Light Method, and the other is an automatic pattern sketching system. Since porcelain pieces are classified into two types according to their shape, two three-dimensional measurement systems are developed. For these measurement systems, we propose a method for calculating the values of three-dimensional coordinates in a simple and fast manner. In the sketching system, the sketching is performed with numerical control. The data for the numerical control used for sketching patterns onto the porcelain are generated using the results measured by the measurement system and CAD system.Experimental results of sketching on porcelain using the numerical control data show that the system is effective.