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Title:
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Surface contouring by optical edge projection based on a continuous wavelet transform.
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Author:
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Quan, Chenggen.; Miao, Hong.; Fu, Yu.
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Copyright year:
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2006 |
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Abstract:
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A novel optical edge projection method for surface contouring of an object with low reflectivity is
presented. A structured light edge is projected onto a dark surface, and the image is captured by a CCD
camera. The surface profile of the object is then evaluated by an active triangular projection technique,
and a whole-field three-dimensional contour of the object is obtained by scanning the optical edge over the
entire object surface. An edge detection method based on a continuous wavelet transform (CWT) is
employed to determine the location of the optical edge. The method of optical edge detection is described,
and characteristic details of gray-level distribution along the edge are analyzed. It is shown that the
proposed wavelet edge detection method is not dependent on any threshold values; hence the true edge
position can be determined without subjective selection. A black low-reflectivity object surface made from
woven carbon fiber is measured, and the experimental results show that the profile of a woven carbon
fiber can be obtained by the proposed method. |
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Subject:
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DRNTU::Science::Physics::Optics and light. |
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Type:
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Journal Article |
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Series/ Journal Title:
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Applied Optics |
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Research Centre:
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Temasek Laboratories |
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Rights:
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This paper was published in [Applied Optics] and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [http://www.opticsinfobase.org/abstract.cfm?URI=ao-45-20-4815]. Systematic or multiple reproduction or distribution to multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. |
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Version:
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Published version |
