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Proceedings Paper

Contrast Perception With Video Displays
Author(s): Stephen M. Pizer; R. Eugene Johnston; John B. Zimmerman; Francis H. Chan
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Paper Abstract

Distributed picture archiving and communication systems require electronic displays, today probably video displays. An obvious restriction with video displays, especially when multiple images are viewed, is on resolution both along image lines and due to the video raster. The effect of this restriction and the needs for improvement will be briefly reviewed. Perhaps a less obvious restriction of video displays is on contrast, as compared to film. Only limited grey-scale contrast is provided, and the fact that multiple images must be presented near each other on a single display means that the contents of one image will affect the perception of another. The perceptual and display mechanisms causing these effects will be described, means of specifying these contrast effects will be presented, and quantitative measures of the effectiveness of various display systems will be given. Pseudocolor scales provide a means on video displays of lessening the restriction on contrast. However, these scales bring with them problems of associability and variation in relative sensitivity across the scale. A linearization method will be presented for avoiding the second problem and thus allowing the comparison of different scales. Ppproachs for choosing sensitive pseudocolor scales without associability difficulties or contour artifacts will be presented, and specific scales superior to grey-scale will be recommended.

Paper Details

Date Published: 14 January 1982
PDF: 8 pages
Proc. SPIE 0318, 1st Intl Conf and Workshop on Picture Archiving and Communication Systems, (14 January 1982); doi: 10.1117/12.967650
Show Author Affiliations
Stephen M. Pizer, University of North Carolina (United States)
R. Eugene Johnston, University of North Carolina (United States)
John B. Zimmerman, University of North Carolina (United States)
Francis H. Chan, University of North Carolina (United States)


Published in SPIE Proceedings Vol. 0318:
1st Intl Conf and Workshop on Picture Archiving and Communication Systems
Andre J. Duerinckx, Editor(s)

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