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Optical Engineering

Novel multiview connection method based on virtual cylinder for 3-D surface measurement
Author(s): Haitao He; Mingyi Chen; Hongwei Guo; Yingjie Yu
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Paper Abstract

In optical 3-D measurements, two steps are generally required to obtain the whole-body 3-D shapes of objects: measuring the 3-D shape from different views, and afterwards connecting them together. The multiview overlapping scanning connection technique in a cylindrical coordinate system is an effective method for measuring a surface with a rotation axis, e.g., a 360-deg shape. However, there are great difficulties in measuring a more complex surface, such as those with concavities or composed of several discontinuous patches, because a complex surface generally cannot be explicitly represented in cylindrical coordinates. To solve these problems, a novel multiview connection method based on virtual cylinders for measurement of 3-D surfaces is proposed. In a Cartesian coordinate system, the virtual cylinders are determined by least-squares fitting to the local overlapping surface patches. The error movements are obtained from a linear equation system based on the virtual cylinders. The connection of adjacent views is then performed by coordinate transformation in 3-D space. Both computer simulation and experimental results are presented to verify the effectiveness of the suggested method.

Paper Details

Date Published: 1 August 2005
PDF: 8 pages
Opt. Eng. 44(8) 083605 doi: 10.1117/1.2011067
Published in: Optical Engineering Volume 44, Issue 8
Show Author Affiliations
Haitao He, Shanghai Univ. (China)
Mingyi Chen, Shanghai Univ. (China)
Hongwei Guo, Shanghai Univ. (China)
Yingjie Yu, Shanghai Univ. (China)

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