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Measurements of individual color matching functions to solve the discrepancy in color appearance among color display devices

测量各个颜色匹配功能以解决彩色显示设备之间颜色外观的差异

基本信息

批准号：
18500160
负责人：
UCHIKAWA Keiji
金额：
$ 2.57万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

项目摘要

The purpose of this study is to deal with the problem of the mismatch of the tristimulus value when the metameric match is achieved among different color devices, by assuming that the color matching functions, which can be used to calculate tristimulus value, have significant individual differences. In order to achieve our goals, we firstly need to develop a compact apparatus to measure color matching functions precisely, and a method of estimating color matching functions with our apparatus. Then we need to verify our method, followed by collecting data on many observers to clarify the individual differences and that deviation from CIE Standard Observer.We developed an apparatus that can present arbitrary combinations of the monochromatic lights with a Maximillian view system. Also we developed an algebraic method using M series to present independent sets of monochromatic lights to the observer to obtain color matching functions. By comparing our method with a traditional method, maximum saturation method, it turned out that our method is less noise-tolerant than MSM. As our method is based on the matrix operation, the noise in a specific stimulus penetrates to other parts, while in the MSM the noise is restricted to that stimulus. The satisfaction of the match, on the other hand, is much higher in our method as the reference stimulus remained constant through all the experiment.10 subjects participated in our experiment as an observer, and the estimated CMFs showed individual differences, not only in the B CMFs but also in G and R CMFs.We also conducted metameric color matching experiment between a color paper and a CRT monitor, and tried to compensate individual differences of CMFs to obtain customized tristimulus values. The color differences, or Eucrid distance, between the tristimulus values of two different media showed a trend that customized tristimulus values give smaller values than those calculated from Standard observers.

本研究的目的是通过假设可用于计算三刺激值的颜色匹配函数具有显著的个体差异，来处理不同颜色设备之间实现同质匹配时三刺激值不匹配的问题。为了实现我们的目标，我们首先需要开发一个紧凑的仪器来精确测量颜色匹配函数，并使用我们的仪器来估计颜色匹配函数的方法。然后我们需要验证我们的方法，然后收集许多观察者的数据，以澄清个体差异和CIE标准观察者的偏差。我们开发了一种装置，可以呈现任意组合的单色光与马克西米利安视图系统。此外，我们还提出了一种代数方法，利用M级数将独立的单色光集合呈现给观察者，以获得颜色匹配函数。将该方法与传统的最大饱和度方法进行了比较，结果表明，该方法对噪声的容忍度低于MSM方法。由于我们的方法是基于矩阵运算的，所以特定刺激中的噪声会渗透到其他部分，而在MSM中，噪声仅限于该刺激。另一方面，由于参考刺激在整个实验过程中保持不变，我们的方法对匹配的满意度要高得多。10名受试者作为观察员参加了我们的实验，估计的CMFs存在个体差异，不仅在B CMFs中，而且在G和R CMFs中。我们还进行了彩色纸与CRT显示器之间的异色匹配实验，并尝试补偿CMFs的个体差异，以获得定制的三刺激值。两种不同介质的三刺激值之间的色差或欧几里德距离显示出一种趋势，即定制的三刺激值比标准观察者计算出的值更小。