| Dual-frequency pattern scheme for high-speed 3-D shape measurement. | |
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MedLine Citation:
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PMID: 20389536 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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A novel dual-frequency pattern is developed which combines a high-frequency sinusoid component with a unit-frequency sinusoid component, where the high-frequency component is used to generate robust phase information, and the unit-frequency component is used to reduce phase unwrapping ambiguities. With our proposed pattern scheme, phase unwrapping can overcome the major shortcomings of conventional spatial phase unwrapping: phase jumping and discontinuities. Compared with conventional temporal phase unwrapped approaches, the proposed pattern scheme can achieve higher quality phase data using a less number of patterns. To process data in real time, we also propose and develop look-up table based fast and accurate algorithms for phase generation and 3-D reconstruction. Those fast algorithms can be applied to our pattern scheme as well as traditional phase measuring profilometry. For a 640 x 480 video stream, we can generate phase data at 1063.8 frames per second and full 3-D coordinate point clouds at 8.3 frames per second. These achievements are 25 and 10 times faster than previously reported studies. |
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Authors:
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Kai Liu; Yongchang Wang; Daniel L Lau; Qi Hao; Laurence G Hassebrook |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Optics express Volume: 18 ISSN: 1094-4087 ISO Abbreviation: Opt Express Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-04-14 Completed Date: 2010-07-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101137103 Medline TA: Opt Express Country: United States |
Other Details:
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Languages: eng Pagination: 5229-44 Citation Subset: - |
Affiliation:
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Department of Electrical Engineering, University of Kentucky, Lexington, KY 40507, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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