ESTIMACIÓN DEL VOLUMEN DE OBJETOS POR MEDIO DE RECONSTRUCCIÓN 3-DIMENSIONAL

Abstract

This work presents the development of an innovative mechatronic prototype able to estimate the volume of irregular objects, which uses computer vision techniques. The prototype presents a computer vision system focused on the realization of high precision measurements. The prototype has advantages over conventional techniques for estimating the volume of objects (for slides, Archimedes' principle, by contact techniques, etc.), since the volume of the object is obtained from a nondestructive measurement technique without contact. Volume measurement of irregular objects is based on three-dimensional reconstruction by computer vision. The methodology used to developed this prototype is mainly composed of two parts. The first carries out the image processing, which is to determine the silhouettes of the object of their different views, this implies the calibration of the camera. The second part is to create the 3D model of the object from point cloud generated with the silhouettes obtained. Once obtained the total point cloud, it creates a 3D mesh using Delaunay triangulation. Given the camera calibration and the total number of points in the cloud, one can determine the volume of the object. Finally, to implement this methodology we built a mechanical device with three degrees of mobility, which allows the system installation image acquisition, and the rotation of the object around its axis. The algorithm for image processing and three-dimensional reconstruction was carried out using a high-level language. The results of the reconstruction process are displayed using a virtual environment GEOMAGIC to get a more realistic view of the object.