Evaluation of the uncertainty of an optical machine with a vision system for contact-less three-dimensional measurement

Optical measuring equipments. Part I: Calibration model and uncertainty estimation

“…The use of digital optical measuring systems has been widely distributed in the industrial area, due to its advantages such as: the speed of data acquisition, measuring function automation, precision, and, above all, the absence of contact [1]. In parallel to the use and development of such equipment in industry [2] there has been a growing interest in the field of scientific research.…”

“…These optical instruments can be divided into two subsystems, a 'machine subsystem' and a "vision subsystem". The first contains the measuring table and the second contains the camera and optics associated with it [1]. At present there is no general procedure for calibrating this equipment established by national metrology institutes, although work has been carried out in this field [1,3].…”

“…The first contains the measuring table and the second contains the camera and optics associated with it [1]. At present there is no general procedure for calibrating this equipment established by national metrology institutes, although work has been carried out in this field [1,3]. In particular, there is abundant scientific literature where you can find different proposals for calibration procedures or verification of the vision system (camera) as well as for the machine system based on verification procedures commonly used in the CMMs [4][5][6].…”

“…In 2004 Lazzari and Iuculano [1] developed a mathematical model to evaluate measurement uncertainties obtained by an optical machine equipped with a CCD (charge coupled device) camera.…”

A Fast Evaluation Approach of Geometrical Correspondence Uncertainty for 3-D Vision Measurement System

“…The mean and variance of these errors are computed for a given set of sensor parameters to obtain a desired accuracy. Lazzari and Iuculano (12) proposed a mathematical model that permits the evaluation of the measurement uncertainty to identify the principle metrological characteristics of 3-D vision measurement system. They qualified each part of the optical device as well as on the whole measurement system.…”