An Auto-Focusing Method in a Microscopic Testbed for Optical Discs

An auto-focusing method in a digital image system is demonstrated that uses a standard deviation of pixel gray levels as a feedback signal. In this system, an optical microscope and a charge coupled device (CCD) camera are used to create clear pit images of optical discs. A dynamic focusing scheme i...

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Detalles Bibliográficos
Autores principales: Tang, Xiao, L’Hostis, Pierre, Xiao, Yu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology 2000
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4877162/
https://www.ncbi.nlm.nih.gov/pubmed/27551624
http://dx.doi.org/10.6028/jres.105.046
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author Tang, Xiao
L’Hostis, Pierre
Xiao, Yu
author_facet Tang, Xiao
L’Hostis, Pierre
Xiao, Yu
author_sort Tang, Xiao
collection PubMed
description An auto-focusing method in a digital image system is demonstrated that uses a standard deviation of pixel gray levels as a feedback signal. In this system, an optical microscope and a charge coupled device (CCD) camera are used to create clear pit images of optical discs. A dynamic focusing scheme is designed in the system-control software, which is able to eliminate environmental disturbances and other noises so that a fast and stable focus can be achieved. The method shows an excellent focusing accuracy. The performance and possible applications of this method are discussed. The test results for optical discs are given in this paper.
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spelling pubmed-48771622016-08-22 An Auto-Focusing Method in a Microscopic Testbed for Optical Discs Tang, Xiao L’Hostis, Pierre Xiao, Yu J Res Natl Inst Stand Technol Article An auto-focusing method in a digital image system is demonstrated that uses a standard deviation of pixel gray levels as a feedback signal. In this system, an optical microscope and a charge coupled device (CCD) camera are used to create clear pit images of optical discs. A dynamic focusing scheme is designed in the system-control software, which is able to eliminate environmental disturbances and other noises so that a fast and stable focus can be achieved. The method shows an excellent focusing accuracy. The performance and possible applications of this method are discussed. The test results for optical discs are given in this paper. [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology 2000 2000-08-01 /pmc/articles/PMC4877162/ /pubmed/27551624 http://dx.doi.org/10.6028/jres.105.046 Text en https://creativecommons.org/publicdomain/zero/1.0/ The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.
spellingShingle Article
Tang, Xiao
L’Hostis, Pierre
Xiao, Yu
An Auto-Focusing Method in a Microscopic Testbed for Optical Discs
title An Auto-Focusing Method in a Microscopic Testbed for Optical Discs
title_full An Auto-Focusing Method in a Microscopic Testbed for Optical Discs
title_fullStr An Auto-Focusing Method in a Microscopic Testbed for Optical Discs
title_full_unstemmed An Auto-Focusing Method in a Microscopic Testbed for Optical Discs
title_short An Auto-Focusing Method in a Microscopic Testbed for Optical Discs
title_sort auto-focusing method in a microscopic testbed for optical discs
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4877162/
https://www.ncbi.nlm.nih.gov/pubmed/27551624
http://dx.doi.org/10.6028/jres.105.046
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