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Proceedings Paper

Noise of CRT display systems
Author(s): Hans Roehrig; Hartwig R. Blume; Tinglan Ji; Malur K. Sundareshan
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Paper Abstract

This paper is an attempt to correlate CRT noise (measured physically) with contrast sensitivity obtained from the detection of square-wave patterns presented to human observers on a CRT. It presents the results of both physical and psychophysical evaluations of the noise of high resolution CRTs at a luminescence level of 65 ft-L. Temporal as well as spatial noise was physically measured with the aid of a photomultiplier-based evaluation system. Human contrast sensitivity was determined physchophysically using square-wave patterns of frequencies ranging from 0.47 lp/deg to 14.9 lp/deg. Even though the set of data is not very extensive, the results indicate a correlation between physical and psychophysical evaluation: for the luminance levels under consideration, the detection of human observers seems to be limited by the spatial noise (phosphor granularity); the temporal noise plays a role only at low luminance levels.

Paper Details

Date Published: 30 June 1993
PDF: 14 pages
Proc. SPIE 1897, Medical Imaging 1993: Image Capture, Formatting, and Display, (30 June 1993); doi: 10.1117/12.146971
Show Author Affiliations
Hans Roehrig, Univ. of Arizona (United States)
Hartwig R. Blume, Philips Medical Systems (United States)
Tinglan Ji, Univ. of Arizona (United States)
Malur K. Sundareshan, Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 1897:
Medical Imaging 1993: Image Capture, Formatting, and Display
Yongmin Kim, Editor(s)

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