Flexible geometrical calibration for fringe-reflection 3D measurement.

System geometrical calibration is a challenging task in fringe-reflection 3D measurement because the fringe displayed on the LCD screen does not lie within the camera's field of view. Commonly, a flat mirror with markers can accomplish system geometrical calibration. However, the position of the markers must be precisely located by photogrammetry in advance. In this Letter, we introduce a calibration method by use of a markerless flat mirror. Experiments in phase measuring deflectometry demonstrate that the proposed method is simple and flexible.

[1]  Xianyu Su,et al.  Fringe inverse videogrammetry based on global pose estimation. , 2011, Applied optics.

[2]  Manolis I. A. Lourakis,et al.  SBA: A software package for generic sparse bundle adjustment , 2009, TOMS.

[3]  V. Lepetit,et al.  EPnP: An Accurate O(n) Solution to the PnP Problem , 2009, International Journal of Computer Vision.

[4]  Lirong Wang,et al.  Software configurable optical test system: a computerized reverse Hartmann test. , 2010, Applied optics.

[5]  Qican Zhang,et al.  Testing an aspheric mirror based on phase measuring deflectometry , 2009 .

[6]  Qican Zhang,et al.  Dynamic 3-D shape measurement method: A review , 2010 .

[7]  Markus C. Knauer,et al.  Phase measuring deflectometry: a new approach to measure specular free-form surfaces , 2004, SPIE Photonics Europe.

[8]  A. Asundi,et al.  Dynamic three-dimensional sensing for specular surface with monoscopic fringe reflectometry. , 2011, Optics express.

[9]  X. Su,et al.  3D shape measurement of the aspheric mirror by advanced phase measuring deflectometry. , 2008, Optics express.

[10]  Rainer Tutsch,et al.  Optical three-dimensional metrology with structured illumination , 2011 .

[11]  Werner P. O. Juptner,et al.  Evaluation methods for gradient measurement techniques , 2004, SPIE Photonics Europe.

[12]  Manuel Campos-García,et al.  Improving fast aspheric convex surface tests with dynamic null screens using LCDs. , 2011, Applied optics.

[13]  Rainer Tutsch,et al.  Reflection grating photogrammetry: a technique for absolute shape measurement of specular free-form surfaces , 2005, SPIE Optics + Photonics.