Sub-pixel measurement of 3D surfaces by laser scanning

A method for sub-pixel measurement of 3D surfaces based on vision cameras and structured light is presented. The method includes algorithms for sub-pixel calibration, laser stripe detection and 3D reconstruction. In this work, different strategies for sub-pixel calibration and control point extracti...

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Bibliographic Details
Published in:Sensors and actuators. A, Physical Physical, 1999-08, Vol.76 (1), p.1-8
Main Authors: Izquierdo, M.A.G., Sanchez, M.T., Ibañez, A., Ullate, L.G.
Format: Article
Language:English
Subjects:
Calibration
Dimensional measurement
Exact sciences and technology
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Laser
Measurements common to several branches of physics and astronomy
Metrology
Metrology, measurements and laboratory procedures
Optical instruments, equipment and techniques
Physics
Spatial dimensions (e.g.: position, lengths, volume, angles, displacements, including nanometer-scale displacements)
Spatial dimensions (eg, position, lengths, volume, angles, displacements, including nanometer-scale displacements)
Units and standards
Vision
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Summary:A method for sub-pixel measurement of 3D surfaces based on vision cameras and structured light is presented. The method includes algorithms for sub-pixel calibration, laser stripe detection and 3D reconstruction. In this work, different strategies for sub-pixel calibration and control point extraction are implemented and compared obtaining accuracy around 0.2 pixels for the 3D coordinates. Reconstruction algorithms have been selected to fulfil the accuracy and processing speed demanded in industrial applications.
ISSN:0924-4247
1873-3069
DOI:10.1016/S0924-4247(98)00283-0