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Proceedings of 2009 International Workshop on Information Security and Application (IWISA 2009)

Qingdao, China, November 21-22, 2009

Editors: Feng Gao and Xijun Zhu

AP Catalog Number: AP-PROC-CS-09CN004

ISBN: 978-952-5726-06-0

Page(s): 66-69

Normal Vector of Scanned Surfacer’s Influence on the Laser Scanning Error

        Yong-an Xu, Jie Wu, Xiabing He, and Ling Cheng

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In the 3D laser line scanning system, the CCD camera is used to collected the reflection image of laser scan line on the object surface. Due to the effects of normal vector of object surface, there has deviation between energy center of light stripe and geometric center of light plane, and this deviation result in a max num error value of about 0.1mm In this paper, We use the standard high-precision sphere as a sampling, use left and right CCD camera to scan spherical surface, then the deviation of scanning data of left and right CCD camera can be calculated. The orthogonal test method was used to analyze the relationship between the deviation of true measurement and the normal vector of object surface, and give a reasonable error compensation on the actual measurement data, This makes the value of measurement accuracy ± 0.02mm.

Index Terms

Laser scanning; Error analysis; Orthogonal test method; Light reflex

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