대한의용생체공학회:학술대회논문집 (Proceedings of the KOSOMBE Conference)
- 대한의용생체공학회 1991년도 춘계학술대회
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- Pages.18-21
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- 1991
CRT 모니터의 배경(背景) 계조도(階調度)가 영상의 시각인식(視覺認識)에 미치는 영향
The Effect of Background Grey Levels on the Visual Perception of Displayed Image on CRT Monitor
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Kim, Jong-Hyo
(Institute of Biomedical Engineering, College of Medicine, Seoul National University) ;
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Park, Kwang-Suk
(Dept. of Biomedical Engineering, College of Medicine, Seoul National University) ;
- Min, Byoung-Goo (Dept. of Biomedical Engineering, College of Medicine, Seoul National University) ;
- Lee, Choong-Woong (Dept. of Electronics, Seoul National University)
- 발행 : 1991.05.15
초록
In this paper, the effect of background grey levels on the visual perception of target image displayed on CRT monitor has been investigated. The purpose of this study is to investigate the efficacy of CRT monitor as a display medium of image information especially in medical imaging field. Three sets of experiments have been performed in this study; the first was to measure the luminance response of CRT monitor and to find the best fitting equation, and the second was the psychophysical experiment measuring the threshold grey level difference between the target image and the background required for visual discrimination for various background grey levels, and the third was to develop a visual model that is predictable of the threshold grey level difference measured in the psychophysical experiment. The result of psycophysical experiment shows that the visual perception performance is significantly degraded in the range of grey levels lower than 50, which is turned out due to the low luminance change of CRT monitor in this range while human eye has been adapted to relatively bright ambient illumination.
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