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Proceedings Paper

Problems In Measuring Display Performance
Author(s): Joseph L. Hallett
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Paper Abstract

Visual presentations, commonly called displays, overlap many engineering disciplines. As a result, many different methods for measuring display performance have been developed, depending on the background and experience of the particular agency, company or individuals involved. This paper is intended to highlight the problems of first obtaining a workable definition of the end result desired from a given display, and second, obtaining a workable method for rapid and accurate measurements of the performance of individual components and equipment which must eventually go together and satisfy the user's needs. Typically, the user wants legibility and error-free performance, while the component and system designer is more interested in such parameters as contrast, brightness, color and resolution. To further complicate the problem, the units and measurement techniques differ widely between different engineering disciplines. Deficiencies in measuring equipment further restrict both the user and the display designer from reaching quick and easy conclusions about the performance of a particular display. The small lighted areas of most displayed data make some form of spot photometer necessary to measure brightness; the monochromatic nature of many displays makes most spot photometer measurements highly questionable unless care has been taken to calibrate the instrument on a standard source having the proper spectral energy distribution. Contrast is considered to be important display parameter, yet the various methods for establishing a known ambient illumination level can give quite different numerical results. The human eye is extremely tolerant of color and brightness changes, yet most display specifications are quite rigid in controlling these parameters. It is hoped that the discussion stimulated by these and other problems will help to establish a climate where coordination of display measuring techniques and standards will be accomplished.

Paper Details

Date Published: 1 June 1966
PDF: 1 pages
Proc. SPIE 0005, The Human in the Photo-Optical System, (1 June 1966); doi: 10.1117/12.946693
Show Author Affiliations
Joseph L. Hallett, Sylvania Electronic Systems (United States)

Published in SPIE Proceedings Vol. 0005:
The Human in the Photo-Optical System
Robert L. Minter, Editor(s)

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