Confronto tra diverse tecniche di digitalizzazione delle forme per il reverse engineering

Nowadays, shape acquisition systems have reached enough capabilities to reproduce geometric profiles of objects (even complex) with a high accuracy and repeatability. For this reason, their use is in continuous growth: from Reverse Engineering (RE) applications for the analysis of the competition, to the quality control of industrial products; from the creation of models for virtual reality environments to the reconstruction and restoration of objects that belong to cultural heritage. For all these kinds of application a large number of 2 systems, based on different approaches (mechanical, optic, laser based sensors), have been developed and used but a critical evaluation of their applicability fields has not yet been carried out in an univocal manner. The authors propose a comparison among different techniques applied to three components with the aim of evaluating their suitability to different kinds of problem (digitalisation of mechanical components, stamped panels or artistic objects). To assess the different acquisitions each other, an evaluation protocol based on several criteria (accuracy, resolution, speed, ease of use, cost, etc.) is proposed. The point clouds of the considered components have been then post-processed to analyse from both a quality and quantity point of view the different acquisitions.