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• W2000884787 abstract "AbstractThis paper describes a direct measuring technique for determining the image quality ofraster - scanned cathode -ray tube (CRT) displays. This technique is based on the ModulationTransfer Function (MTF) theory and human visual psychophysical data. The rationale for thetechnique is discussed from a theoretical as well as functional viewpoint. The instrumenta-tion necessary to obtain these measures in manual and automatic modes is discussed. Dataobtained using this measurement technique are analyzed and compared with the theoreticalperformance of the displays. The image quality of new CRT displays procured for the U.S.Army's Advanced Attack Helicopter is being specified and tested using this direct measuringtechnique.IntroductionAdvances in electronic display technology have not yet changed the primacy of the CRT inthe area of video information displays. Yet, a comprehensive basis for specifying televi-sion display image quality which relates to human operator performance parameters has notevolved even though numerous studies have investigated various facets of this specificationproblem during the past thirty years.This specification problem is directly related to the lack of standardization in displayperformance metrics. Currently, no universally acceptable technique exists for analyzingtelevision display system quality. Each manufacturer establishes his own test, measurement,and evaluation procedures.The lack of standardization in measurement techniques makes it virtually impossible toestablish comprehensive performance specifications. Presumably, television display manufac-turers publish specifications so prospective buyers can evaluate this data before selectinga particular unit for their needs. But, it is difficult to find a common denominator sothat one can compare units built by various manufacturers on the basis of performance.Many techniques were tried during the late 1960's and early 1970's to measure the imagequality of the miniature CRT's. In the mid 1970's a new technique was developed at theAerospace Medical Research Laboratory (AMRL), Wright- Patterson Air Force Base./ The U.S.Army Aeromedical Research Laboratory, Fort Rucker, Alabama, U.S. Army Night Vision and Elec-tro- Optics Laboratory, Fort Belvoir, Virginia, and Honeywell, Inc., have continued to useand refine the techniques developed at AMRL. The evolved procedures and caveats for apply-ing the measuring technique to miniature as well as panel- mounted CRT displays are presentedin detail. BackgroundThe resolution of optical elements has been measured for years by means of two- dimension-al bar patterns with various spacings and angular arrangements. The optical element underinvestigation forms an image of the bar pattern, and the observer subjectively determinesthe limiting resolution from the smallest set of bars he can resolve. With this type oftest, it is possible to determine only a subjective maximum resolution. This resolutionmeasure provides information about only a single spatial frequency. How the display oper-ates at other spatial frequencies is not determined. Also, there is too much variabilityin this method of measurement for it to be used as a basis for setting specifications." @default.
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• W2000884787 date "1979-11-15" @default.
• W2000884787 modified "2023-09-27" @default.
• W2000884787 title "<title>Direct Measure Of Cathode-Ray Tube (CRT) Image Quality</title>" @default.
• W2000884787 doi "https://doi.org/10.1117/12.957962" @default.
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