STEREO MOIRE TECHNIQUE: A NOVEL 3-D MEASUREMENT METHOD USING A STEREO CAMERA AND A DIGITAL PATTERN PROJECTOR

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This article deals with a novel 3-D sensor system that employs a measurement technique called the Stereo Moire technique. The general Moire method, which is well known for fast and accurate 3-D measurement, has suffered from an inherent limitation in that it cannot measure the absolute 3-D depth due to 2 pi ambiguity caused by regularity of fringe. In this article, to overcome this 2 pi ambiguity and obtain the exact depth value effectively, a novel method is proposed. The measurement system consists of a digital pattern projector and two cameras, which can indirectly detect two phase information on the fringe patterns projected onto an object's surface. These two phase values are different due to the difference in camera position. However, the depth values obtained at two different phase information must be identical because the two cameras look at the same point on the object being measured. To verify the efficiency and accuracy of the proposed method, a series of experimental tests was performed. Through the experiments, it is shown that the proposed method can effectively overcome the 2 pi ambiguity of the typical Moire technique, and obtain the absolute depth value of the 3-D scene geometric information with satisfactory accuracy.
Publisher
TAYLOR & FRANCIS INC
Issue Date
2007
Language
English
Article Type
Article
Citation

INTERNATIONAL JOURNAL OF OPTOMECHATRONICS, v.1, no.2, pp.209 - 230

ISSN
1559-9612
DOI
10.1080/15599610701397482
URI
http://hdl.handle.net/10203/88450
Appears in Collection
ME-Journal Papers(저널논문)
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