Photogrammetric Techniques for Measurements in Woodworking Industry

Accurate measurement of wood volume is a very important task at each stage of woodworking process beginning with estimation of volume of cut trees and finishing with determining the volume of resulting product. In most cases, current technology of measurement is based on inexact manual procedures and gives rather rough data. To introduce a new measurement technology in woodworking industry 3D imaging techniques are developed for two general stages of woodworking: for volume estimation of tree packages coming to logging enterprise and for volume determination of a log moving on a conveyor belt. The system for cut tree packages estimation is based on stereo image acquisition of the front view of the tree package and calculation of the area of log cuts. The developed methods for cuts measurements are discussed. For log volume determination during conveyor wood processing a technique based on moving log image acquisition in stripe light is developed. It allows generating a 3D model of the log which is used for volume estimation. The paper describes the developed methods of 3D measurements, outlines of the hardware used for image acquisition and the software realized the developed algorithms, gives the productivity and precision characteristics of the system. * V. Knyaz. Tel. 7-095-1573127, Fax: 7-095-1573900, e-mail: [email protected]