Analysis and Reduction of Moire Patterns in Scanned Halftone Pictures

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dc.contributor.authorLiu, Xiangdongen
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.contributor.departmentComputer Scienceen
dc.date.accessioned2014-03-14T20:21:20Zen
dc.date.adate1996-05-01en
dc.date.available2014-03-14T20:21:20Zen
dc.date.issued1996-05-01en
dc.date.rdate1996-05-01en
dc.date.sdate1998-07-18en
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.description.degreePh. D.en
dc.identifier.otheretd-158151259631631en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-158151259631631/en
dc.identifier.urihttp://hdl.handle.net/10919/30304en
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
thesis.degree.disciplineComputer Scienceen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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