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dc.contributor.authorLiu, Xiangdongen
dc.date.accessioned2014-03-14T20:21:20Zen
dc.date.available2014-03-14T20:21:20Zen
dc.date.issued1996-05-01en
dc.identifier.otheretd-158151259631631en
dc.identifier.urihttp://hdl.handle.net/10919/30304en
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
dc.publisherVirginia Techen
dc.relation.haspartetd.pdfen
dc.relation.haspartliuliu.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectmoire patternsen
dc.subjecthalftoneen
dc.subjectscanningen
dc.subjectimage processingen
dc.subjectFourier analysisen
dc.titleAnalysis and Reduction of Moire Patterns in Scanned Halftone Picturesen
dc.typeDissertationen
dc.contributor.departmentComputer Scienceen
dc.description.degreePh. D.en
thesis.degree.namePh. D.en
thesis.degree.leveldoctoralen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineComputer Scienceen
dc.contributor.committeechairEhrich, Roger W.en
dc.contributor.committeememberShaffer, Clifford A.en
dc.contributor.committeememberHeath, Lenwood S.en
dc.contributor.committeememberCampbell, James B. Jr.en
dc.contributor.committeememberAbbott, A. Lynnen
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-158151259631631/en
dc.date.sdate1998-07-18en
dc.date.rdate1996-05-01en
dc.date.adate1996-05-01en


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