Digital multiple wavelength phase shifting algorithm

dc.contributor.author Zhang, Song
dc.contributor.department Mechanical Engineering
dc.date 2019-07-18T06:23:50.000
dc.date.accessioned 2020-06-30T06:02:48Z
dc.date.available 2020-06-30T06:02:48Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 2009
dc.date.embargo 2014-11-07
dc.date.issued 2009-08-01
dc.description.abstract <p>This paper presents a digital multiple-wavelength phase-shifting technique for three-dimensional shape measurement. The projected phase-shifted fringe images have wavelengths of λ<sub>κ</sub> = W/2<sup>κ-1</sup> (k = 1,2,3...). The phase unwrapping is not needed for the longest wavelength because a single fringe covers the whole area. The shorter wavelength phase, φκ(x,y), is unwrapped by referring to the previously unwrapped longer wavelength phase, Φ<sub>k-1</sub>(x,y), pixel by pixel without accessing its neighborhood pixels. Experiments demonstrate that this technique has low noise and less sensitivity to motion. It can be used to measure arbitrary step height and multiple objects simultaneously.</p>
dc.description.comments <p>This is a conference proceeding from <em>Optical Inspection and Metrology for Non-Optics Industries</em> 7432 (2009): 1, <a href="http://dx.doi.org/10.1117/12.823903" target="_blank">doi:10.1117/12.823903</a>. Posted with permission.</p> <p>Copyright 2009 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.</p>
dc.identifier archive/lib.dr.iastate.edu/me_conf/75/
dc.identifier.articleid 1078
dc.identifier.contextkey 6337726
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath me_conf/75
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/54917
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/me_conf/75/2009_Zhang_DigitalMultiple.pdf|||Sat Jan 15 01:49:00 UTC 2022
dc.source.uri 10.1117/12.823903
dc.subject.disciplines Computer-Aided Engineering and Design
dc.subject.disciplines Graphics and Human Computer Interfaces
dc.subject.keywords 3D shape measurement
dc.subject.keywords phase shifting
dc.subject.keywords step height
dc.subject.keywords multiple wavelength
dc.title Digital multiple wavelength phase shifting algorithm
dc.type article
dc.type.genre conference
dspace.entity.type Publication
relation.isOrgUnitOfPublication 6d38ab0f-8cc2-4ad3-90b1-67a60c5a6f59
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