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A Method for Projecting Multiple Stripe Patterns for High Precision 3D Measurement  

Chang, Min-Ho ((주)솔루션닉스 기술연구소)
Publication Information
Journal of the Korean Society for Precision Engineering / v.24, no.2, 2007 , pp. 58-63 More about this Journal
Abstract
This paper proposes a novel method of projecting a multiple stripe pattern whose intensity profile is sinusoidal. The sinusoidal stripe patterns are plated with chromium on a piece of glass, and the glass is placed within an optical projection system. By linearly moving the glass along the direction of the stripe pattern, the projection system generates the motion blurring effect, and as a result, produces a blurred stripe pattern whose intensity profile is sinusoidal along the perpendicular direction of the stripe pattern. The sinusoidal pattern improves the measurement accuracy of phase-shifting method. Experimental results are provided for three different types of stripe patterns: rectangle, diamond, and sinusoid.
Keywords
3D measurement; optical triangulation; phase shifting; motion blurring; Graycode; stereo vision;
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