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Camera orientation and 3D-deformation measurement by use of cross gratings

The orientation of stereo cameras in a close range environment is derived by a modified bundle block adjustment, using the cross coordinates of a shifted high quality grating. By means of the HOUGH-transform, approximate grating coordinates are determined, which are used to calculate the final coord...

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Bibliographic Details
Published in:Optics and lasers in engineering 1995, Vol.22 (3), p.215-226
Main Authors: Andresen, K., Hentrich, K., Huebner, B.
Format: Article
Language:English
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Summary:The orientation of stereo cameras in a close range environment is derived by a modified bundle block adjustment, using the cross coordinates of a shifted high quality grating. By means of the HOUGH-transform, approximate grating coordinates are determined, which are used to calculate the final coordinates fully automatically with a correlation filter technique. The stereo setup is applied to measure the 3D-deformation on the surface of a cold welded CuAl tension specimen supplied with a titanium dioxide cross grating.
ISSN:0143-8166
1873-0302
DOI:10.1016/0143-8166(94)00047-E