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首页> 外文会议>TAGA annual technical conference >Study of Visual-Instrumental Agreement in Different Color Spaces for Colors Close to Boundary of Quadrants in CIEL~*a~*b~* Color Space
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Study of Visual-Instrumental Agreement in Different Color Spaces for Colors Close to Boundary of Quadrants in CIEL~*a~*b~* Color Space

机译：CIEL〜* a〜* b〜*颜色空间中接近象限边界的颜色在不同颜色空间中的视觉工具一致性研究

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Spot color printing has a significant role in maintaining consistency in shade reproduction on different substrates. For consistency in quality reproduction, the first step is color measurement, but because color is a psychophysical quantity, numerical shade approval is not sufficient. Thus, a shade must be approved visually as well as numerically. Visual-instrumental agreement is very important in color approval. A shade may be reproduced in different sample sizes, and then due to sample size, a viewing field angle must be selected. Viewing field changes may change visual perception of the same shade. Generally, shades that are closer to the boundary of quadrants are more likely to be subject to perceived color changes. This study is carried out for colors that fall near quadrant boundaries in CIEL~*a~*b~* color space. In this work, colors that have a~* or b~* absolute values less than 2 and change their quadrant after switching field of viewing are considered. Psychophysical experiments were conducted considering 2 ° human observers, and the results show that visual-instrumental agreements are worse at quadrant boundaries. It was found that in the case that the shade falls closer to boundary of quadrant, setting tolerance limits becomes very difficult. If the same color is plotted in different color spaces such as LABNHU, LLAB, RLAB or ZLAB and comparison is carried out, the RLAB model seems to be more useful in the spot color approval process.
机译：专色印刷在维持不同基材上的阴影再现的一致性方面具有重要作用。为了保持质量再现的一致性，第一步是颜色测量，但是由于颜色是一种心理物理量，因此数字阴影认证是不够的。因此，阴影必须在视觉上和数字上得到认可。视觉仪器的协议在颜色批准中非常重要。可以以不同的样本大小复制阴影，然后由于样本大小，必须选择视野角。视野变化可能会改变相同阴影的视觉感知。通常，更接近象限边界的阴影更容易受到感知的颜色变化的影响。对落入CIEL〜* a〜* b〜*颜色空间中象限边界的颜色进行了此项研究。在这项工作中，考虑a〜*或b〜*绝对值小于2并在切换视场后改变其象限的颜色。进行了2位人类观察者的心理物理实验，结果表明，在象限边界处，视觉仪器的一致性较差。发现在阴影接近象限边界的情况下，设置公差极限变得非常困难。如果将相同的颜色绘制在LABNHU，LLAB，RLAB或ZLAB等不同的颜色空间中并进行比较，则RLAB模型似乎在专色批准过程中更有用。

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