1 August 2005 Novel multiview connection method based on virtual cylinder for 3-D surface measurement
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Optical Engineering, 44(8), 083605 (2005). doi:10.1117/1.2011067
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.
Haitao He, Mingyi Chen, Hongwei Guo, Yingjie Yu, "Novel multiview connection method based on virtual cylinder for 3-D surface measurement," Optical Engineering 44(8), 083605 (1 August 2005). https://doi.org/10.1117/1.2011067

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