A stereovision system for dimensional measurements in industrial robotics applications

Abstract

The great variety of artificial vision applications, ranging from industrial automation and robotics to analysis and classification of documents, from bioinformatics and medicine to data mining, is due to the reinforcement of information sytems by the realization of algorithms that improved stability and efficiency of the results, also from the computational complexity point of view. The purpose of this work is to propose a stereoscopic vision system for dimensional measurements in an application of industrial robotics. The paper describes as a camera mounted on a six-axis robot manipulator cna calculate the real dimension of a target object. So, in the application the vision system is not composed by two physical cameras, bu tthe stero system is created by the mnovement of a single lcamera. The work provides a calibration procedure of the camera preliminary to the stage of actual measuremetn. Experimental results on a target with a simpole and well-defined shape have shown that the accuracy of the measurement is strongly influenced by a correct calibration.