Title :
3D optical whole-field range sensor: development of procedures for the automatic set-up of the measurement and the calibration of the system
Author_Institution :
Dept. of Electron. for the Autom., Brescia Univ.
Abstract :
In this paper, the procedures developed to enhance the flexibility and the robustness of an optical whole-field profilometer are presented, as well as the procedure for calibrating it. The system is based on active triangulation. In order to comply with a sufficiently wide typology of targets, three different techniques to perform light coding have been integrated. In order to guarantee a sufficient robustness and simplicity of use, the system has been equipped with a procedure for the automatic determination of the measurement parameters, both geometrical and optical. Good linearity has been observed, and an overall mean value of the measurement error equal to 40 μm, with a variability of about ±15 μm, corresponding to 0.06% of full scale have been estimated
Keywords :
CCD image sensors; automatic optical inspection; calibration; computer vision; distance measurement; optical projectors; optical sensors; surface topography measurement; 3D imaging sensor; 3D optical whole-field range sensor; Gray code; active triangulation; automatic determination; automatic set-up; calibration; enhanced flexibility; integrated light coding techniques; iterative algorithm; linearity; liquid crystal projector; measurement parameters; optical whole-field profilometer; reverse engineering; robustness; structured light; video camera; Calibration; Cameras; Geometrical optics; Optical sensors; Optoelectronic and photonic sensors; Performance evaluation; Position measurement; Robustness; Sensor systems; Time measurement;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1999. IMTC/99. Proceedings of the 16th IEEE
Conference_Location :
Venice
Print_ISBN :
0-7803-5276-9
DOI :
10.1109/IMTC.1999.777038
