08.2021.359.370

A Study to Evaluate the Calibration of Optical Three-Dimensional Scanner

Author(s):

Ahmed Z. M. Shammari*, Maher Yahya Salloom, Riydh Makki Hashim, Sadoon R. Daham

Affiliation(s):

University of Baghdad, AL-Khwarizmi College of Engineering, Baghdad, Iraq

Corresponding Author Email: drahmed@kecbu.uobaghdad.edu.iq

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

In recent times, it has become popular to use the 3D scanner for the purpose of measurement remotely due to its accuracy and efficiency in scientific research. However, there is no clear approach for calibration of the scanner accuracy. Consequently, the use of gauge block in calibration process is one of the robust methods of high-precision calibrations. This work proposes a new procedure to evaluate the calibration of the 3D scanner, specifically adjusting the dimensions of the measured objects based on the high precision of standard gauge blocks. The proposed procedure focuses on scanning a set of standard gauge block samples of known lengths, after which the digital models of these samples are analyzed to obtain the accuracy of the 3D scanner. In addition, a linear fitting relationship was obtained to predict the original length of the object measured by the 3D scanner. Consequently, the results of current study show that the fitting equations give us the true length of the product after substituting the length values determined by the 3D scanner into these equations. Therefore, the proposed procedure offer significantly higher accuracy of length measurements compared with 3D scanner measurements.