Please use this identifier to cite or link to this item:
|Title:||Surface contouring by optical edge projection based on a continuous wavelet transform||Authors:||Quan, Chenggen
|Keywords:||DRNTU::Science::Physics::Optics and light||Issue Date:||2006||Source:||Quan, C., Miao, H., & Fu, Y. (2006). Surface contouring by optical edge projection based on a continuous wavelet transform. Applied Optics, 45(20), 4815-4820.||Series/Report no.:||Applied Optics||Abstract:||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.||URI:||https://hdl.handle.net/10356/91919
|ISSN:||0003-6935||DOI:||http://dx.doi.org/10.1364/AO.45.004815||Rights:||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.||metadata.item.grantfulltext:||open||metadata.item.fulltext:||With Fulltext|
|Appears in Collections:||TL Journal Articles|
Files in This Item:
|Surface contouring by optical edge projection based on a continuous wavelet transform.pdf||884.12 kB||Adobe PDF|
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.