Urban Philipp, Fedutina Maria, Lissner Ingmar
Institute of Printing Science and Technology, Technische Universität Darmstadt, Magdalenenstrasse 2, 64289 Darmstadt, Germany.
J Opt Soc Am A Opt Image Sci Vis. 2011 Jul 1;28(7):1500-12. doi: 10.1364/JOSAA.28.001500.
Small suprathreshold color differences around five CIE color centers were investigated on a typical liquid crystal display (LCD) with fluorescent backlight using the method of constant stimuli. The results were evaluated using probit analysis and compared with surface-color differences of the RIT-DuPont dataset. We focused especially on the relationship between T50 distances obtained from LCD and surface-color stimuli and on the influence of the display's narrowband primaries and its relatively low luminance level on interobserver uncertainty. The low luminance level of the LCD decreases the perceived color differences. However, considering the visual uncertainty of the experimental data, we could not reject the hypothesis that T50 distances from the RIT-DuPont and our experiment agree up to a constant scaling factor. In addition, we found significantly higher interobserver variability in the estimation of small color differences if the colors are viewed on an LCD. There are some indications that color-difference perception might be influenced by individual color-matching functions and, thus, by the spectral power distribution of the stimuli. We provide the experimental data, including all spectral stimuli shown to the observers, on our website.
利用恒定刺激法，在一台典型的带荧光背光源的液晶显示器（LCD）上，研究了围绕五个CIE颜色中心的微小超阈值颜色差异。使用概率分析对结果进行评估，并与RIT - 杜邦数据集的表面颜色差异进行比较。我们特别关注从LCD获得的T50距离与表面颜色刺激之间的关系，以及显示器的窄带原色及其相对较低的亮度水平对观察者间不确定性的影响。LCD的低亮度水平会降低感知到的颜色差异。然而，考虑到实验数据的视觉不确定性，我们不能拒绝这样的假设：来自RIT - 杜邦的数据和我们实验中的T50距离在一个恒定的比例因子范围内是一致的。此外，我们发现，如果在LCD上观察颜色，在估计微小颜色差异时观察者间的变异性显著更高。有一些迹象表明，颜色差异感知可能会受到个体颜色匹配函数的影响，从而受到刺激的光谱功率分布的影响。我们在网站上提供了实验数据，包括向观察者展示的所有光谱刺激。
