Effects of color CRT misconvergence, target size, and nontarget density on visual search performance

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dc.contributor.authorHerb, Isabel Moghissien
dc.contributor.committeechairBeaton, Robert J.en
dc.contributor.committeememberSnyder, Harry L.en
dc.contributor.committeememberDryden, Robert D.en
dc.contributor.departmentIndustrial Engineering and Operations Researchen
dc.date.accessioned2014-03-14T21:37:03Zen
dc.date.adate2009-06-08en
dc.date.available2014-03-14T21:37:03Zen
dc.date.issued1990-08-05en
dc.date.rdate2009-06-08en
dc.date.sdate2009-06-08en
dc.description.abstractRapid engineering developments in electronic imaging during the last decade have led to the widespread use of color CRT displays. misconvergence among the primary colors of a shadow-mask CRT is a principle human factors concern for applications of this technology. The major objectives of this research were: (1) to determine the effect of misconvergence on visual search performance (i.e., search time and error), (2) to examine the effects of misconvergence on subjective image quality estimates, and (3) to examine the interactions among target size, nontarget density, and misconvergence type and degree upon subjective and objective human performance indices. Ten participants performed a visual "search-and-select" task on a color CRT computer workstation. Following each trial in this procedure, participants subjectively rated the image quality of the display screen using a 9-point scale. Reducing target size increased selection errors and response times, while increasing nontarget density generally increased response times. Type and degree of shadow-mask CRT misconvergence had almost no effect on visual search performance, suggesting that low levels (1 to 2 arcmin) of misconvergence may be acceptable in effective color CRT applications. However, misconvergence adversely affected subjective image quality ratings, indicating that color CRT usage should be avoided where their use is not essential.en
dc.description.degreeMaster of Scienceen
dc.format.extentix, 90 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-06082009-170749en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06082009-170749/en
dc.identifier.urihttp://hdl.handle.net/10919/42884en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1990.H432.pdfen
dc.relation.isformatofOCLC# 22606653en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1990.H432en
dc.subject.lcshImaging systems -- Image qualityen
dc.titleEffects of color CRT misconvergence, target size, and nontarget density on visual search performanceen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineIndustrial Engineering and Operations Researchen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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