Improved geometrical model of fringe projection profilometry.

The accuracy performance of fringe projection profilometry (FPP) depends on accurate phase-to-height (PTH) mapping and system calibration. The existing PTH mapping is derived based on the condition that the plane formed by axes of camera and projector is perpendicular to the reference plane, and measurement error occurs when the condition is not met. In this paper, a new geometric model for FPP is presented to lift the condition, resulting in a new PTH mapping relationship. The new model involves seven parameters, and a new system calibration method is proposed to determine their values. Experiments are conducted to verify the performance of the proposed technique, showing a noticeable improvement in the accuracy of 3D shape measurement.

[1]  M. Takeda,et al.  Fourier transform profilometry for the automatic measurement of 3-D object shapes. , 1983, Applied optics.

[2]  A Asundi,et al.  Unified calibration technique and its applications in optical triangular profilometry. , 1999, Applied optics.

[3]  Zhengyou Zhang,et al.  A Flexible New Technique for Camera Calibration , 2000, IEEE Trans. Pattern Anal. Mach. Intell..

[4]  Qingying Hu,et al.  Calibration of a three-dimensional shape measurement system , 2003 .

[5]  Peisen S. Huang,et al.  Error compensation for a three-dimensional shape measurement system , 2003 .

[6]  Peisen S. Huang,et al.  Novel method for structured light system calibration , 2006 .

[7]  Wenjing Chen,et al.  Improved Fourier-transform profilometry. , 2007, Applied optics.

[8]  Zhaoyang Wang,et al.  Three-dimensional shape measurement with an arbitrarily arranged fringe projection profilometry system. , 2007, Optics letters.

[9]  Jiangtao Xi,et al.  Neural network digital fringe calibration technique for structured light profilometers. , 2007, Applied optics.

[10]  Emanuele Zappa,et al.  Fourier-transform profilometry calibration based on an exhaustive geometric model of the system , 2009 .

[11]  Emanuele Zappa,et al.  Innovative calibration technique for fringe projection based 3D scanner , 2011 .

[12]  Yingchun Wu,et al.  Improved algorithm for phase-to-height mapping in phase measuring profilometry. , 2012, Applied optics.

[13]  J. Xi,et al.  Essential parameter calibration for the 3D scanner with only single camera and projector , 2013 .

[14]  Byeong-Mook Chung,et al.  Hybrid method for phase-height relationship in 3D shape measurement using fringe pattern projection , 2014 .

[15]  Beiwen Li,et al.  Novel calibration method for structured-light system with an out-of-focus projector. , 2014, Applied optics.