Least-squares phase-height mapping for fringe projection profilometry considering camera lens distortion

Lei Huang; Patrick S. K. Chua; A. Asundi

doi:10.1117/12.851431

14 April 2010 Least-squares phase-height mapping for fringe projection profilometry considering camera lens distortion

Lei Huang, Patrick S. K. Chua, A. Asundi

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 75220I (2010) https://doi.org/10.1117/12.851431
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

Abstract

The least-squares method can be utilized in the calibration procedure for fringe projection profilometry to make it easier and more flexible, since the geometric parameters of the system are not to be measured and the precise control of plane moving is not required as well. Furthermore, the system components can be arbitrarily arranged which brings much convenience to practical measurement. With a consideration of camera lens distortion, a modified least-squares phaseheight mapping description is proposed. In this method, camera lens distortion effect is involved into the mathematical description of the system for least-squares estimation to reduce the influence of lens distortion. Both simulation and experiment are demonstrated to show the feasibility and convenience of this modified least-squares phase-height mapping method.

Citation Download Citation

Lei Huang, Patrick S. K. Chua, and A. Asundi "Least-squares phase-height mapping for fringe projection profilometry considering camera lens distortion", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75220I (14 April 2010); https://doi.org/10.1117/12.851431

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KEYWORDS

Calibration

Distortion

Cameras

Fringe analysis

Projection systems

3D metrology

Imaging systems

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