Yano Yudai, Morishita Junji, Akamine Hiroshi, Hashimoto Noriyuki, Nakamura Yasuhiko, Yabuuchi Hidetake
Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan,
Radiol Phys Technol. 2014 Jul;7(2):367-72. doi: 10.1007/s12194-014-0274-1. Epub 2014 Jun 14.
Liquid-crystal displays (LCDs) are used for displaying medical images under various illuminance conditions and with ambient-lighting colors. Our purpose in this study was to understand the variations of the chromaticity in LCDs under different fluorescent lighting conditions. The variation of chromaticity of LCDs at a white point consisting of equivalent pixel value in Red, Green, and Blue was examined under different types of fluorescent lighting. The direction of changes in the chromaticity diagram shifted to the color of each fluorescent lighting. When the differences in chromaticity (∆u'v') increased, the observers' confidence levels in distinguishing color differences also increased. When the luminance of the LCD increased, observers' sensitivities for recognizing differences in chromaticity also increased as compared to observers' sensitivities at lower luminances. Our results indicate that observers recognized slightly yellowish colors even if ∆u'v' was less than 0.01; thus, observers could perceive differences in chromaticity. These results could provide important and relevant information with regard to better ambient lighting conditions in an image-reading room.
液晶显示器（LCD）用于在各种照度条件下以及不同环境光颜色下显示医学图像。本研究的目的是了解不同荧光照明条件下LCD色度的变化。在不同类型的荧光照明下，研究了由红、绿、蓝等效像素值组成的白点处LCD色度的变化。色度图的变化方向向每种荧光照明的颜色偏移。当色度差异（∆u'v'）增加时，观察者区分颜色差异的置信度也会增加。与低亮度下观察者的敏感度相比，当LCD亮度增加时，观察者识别色度差异的敏感度也会增加。我们的结果表明，即使∆u'v'小于0.01，观察者也能识别出略带黄色的颜色；因此，观察者能够感知色度差异。这些结果可为图像阅读室更好的环境照明条件提供重要且相关的信息。
