30 June 1993 Noise of CRT display systems
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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.
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Hans Roehrig, Hans Roehrig, Hartwig R. Blume, Hartwig R. Blume, Tinglan Ji, Tinglan Ji, Malur K. Sundareshan, Malur K. Sundareshan, } "Noise of CRT display systems", Proc. SPIE 1897, Medical Imaging 1993: Image Capture, Formatting, and Display, (30 June 1993); doi: 10.1117/12.146971; https://doi.org/10.1117/12.146971
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