Correlation of spot characteristics with perceived image quality

Author

Baker, Scott H. ; Carpenter, Mark E.

Author_Institution

Philips Consumer Electron. Corp., Knoxville, TN, USA

Volume

35

Issue

3

fYear

1989

fDate

8/1/1989 12:00:00 AM

Firstpage

319

Lastpage

324

Abstract

A project is described whose primary objective was to determine how much a spot must change in size on a projection CRT (cathode ray tube) before an observer could detect the change. This number is important in estimating the impact of CRT electron gun improvements on observed PTV (projection TV) performance. In order to quantify this subjective ability, the authors designed a focus survey experiment. The focus quality of a spot (i.e. spot size, shape, etc.) is significantly affected by focus voltage, therefore this measurable quantity becomes the numerical link between the subjective perception of the observer and a statistical analysis. The perceived spot size increment on a typical production 46-in projection TV having 330 TV lines of resolution by an average observer from a distance of 10 ft is PSSI₅₀=0.04 mm, PSSI₉₀=0.14 mm

Keywords

cathode-ray tube displays; television picture tubes; television reception; 10 ft; CRT electron gun; cathode ray tube; focus quality; focus survey experiment; focus voltage; perceived image quality; projection CRT; projection TV; shape; spot characteristics; spot size; statistical analysis; subjective perception; Cathode ray tubes; Electrons; Focusing; Image quality; Production; Shape measurement; Size measurement; Statistical analysis; TV; Voltage measurement;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.44287

Filename

44287