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dc.contributor.authorLiu, Xiangdongen_US
dc.date.accessioned2014-03-14T20:21:20Z
dc.date.available2014-03-14T20:21:20Z
dc.date.issued1996-05-01en_US
dc.identifier.otheretd-158151259631631en_US
dc.identifier.urihttp://hdl.handle.net/10919/30304
dc.description.abstractIn this dissertation we provide a comprehensive theory for the formation of a moire pattern in a sampled halftone image. We explore techniques for restoring a sampled halftone image with a moire pattern and techniques for preventing a moire pattern when a halftone picture is scanned. Specifically, we study the frequency, phase, and spatial geometry of a moire pattern. We observe and explain the half period phase reversal phenomenon that a moire pattern may exhibit. As a case study, we examine the moire patterns generated by a commercial scanner. We propose three restoration methods, including a notch filtering method, a simulation method, and a relaxation method. We also describe a moire prevention method, the partial inverse Fourier transform method. Finally, we propose a research agenda for further investigation.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartetd.pdfen_US
dc.relation.haspartliuliu.pdfen_US
dc.rightsI hereby grant to Virginia Tech or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation.en_US
dc.subjectmoire patternsen_US
dc.subjecthalftoneen_US
dc.subjectscanningen_US
dc.subjectimage processingen_US
dc.subjectfourier analysisen_US
dc.titleAnalysis and Reduction of Moire Patterns in Scanned Halftone Picturesen_US
dc.typeDissertationen_US
dc.contributor.departmentComputer Scienceen_US
dc.description.degreePh. D.en_US
thesis.degree.namePh. D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineComputer Scienceen_US
dc.contributor.committeechairEhrich, Roger W.en_US
dc.contributor.committeememberShaffer, Clifford A.en_US
dc.contributor.committeememberHeath, Lenwood S.en_US
dc.contributor.committeememberCampbell, James B. Jr.en_US
dc.contributor.committeememberAbbott, A. Lynnen_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-158151259631631/en_US
dc.date.sdate1998-07-18en_US
dc.date.rdate1996-05-01
dc.date.adate1996-05-01en_US


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