25 November 2009 Zooming effect of three-dimensional shape measurement system using projection method
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Abstract
An automatic three-dimensional shape measurement system using an optical spatial modulator and robot arm has been proposed. The system is composed of an optical spatial modulator from which grating patterns are projected on the surface of the object, a digital camera controlled by a robot arm, and a computer. The patterns on the surface of the object were taken into the computer by the digital camera, and the 3D coordinate of the surface of the object was calculated by modified 3D coordinate conversion equations. The three dimensional shape was measured without any contact in short time in the system. The system was improved using mechanical and optical method and data analysis by modified program. Using zoom lens in the camera, the measurement accuracy and range were improved by using correct proofreading factor per camera pixel and reasonable threshold setting. In this modified system, proofreading factor per camera pixel are measured as a zooming factor, therefore this system don't need to use camera factor and is convenient system.
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Saburo Uchida, Hao Zhu, An Kang Yang, Jing-Nan Liu, Yoshihisa Uchida, "Zooming effect of three-dimensional shape measurement system using projection method", Proc. SPIE 7506, 2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 750606 (25 November 2009); doi: 10.1117/12.840317; https://doi.org/10.1117/12.840317
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