计算机与现代化 ›› 2013, Vol. 218 ›› Issue (10): 79-82.doi: 10.3969/j.issn.1006-2475.2013.10.020

• 计算机仿真 • 上一篇    下一篇

半透明配色建库仿真算法

洪铁,赵龙,吴鹏   

  1. 国防科学技术大学,湖南长沙410073
  • 收稿日期:2013-04-16 修回日期:1900-01-01 出版日期:2013-10-26 发布日期:2013-10-26

Simulation Algorithm of Semi-transparent Color Match for Establishing Database

HONG Tie, ZHAO Long, WU Peng   

  1. National University of Defense Technology, Changsha 410073, China
  • Received:2013-04-16 Revised:1900-01-01 Online:2013-10-26 Published:2013-10-26

摘要: K-M理论指出K/S值与涂料的浓度存在线性关系,但实际中这种线性关系不明显。随着涂料浓度增加,K/S值逐渐趋于一个稳定值,故大部分配色软件都采用对数曲线拟合方式建立数据库。而涂料在半透明状态下,K/S值的线性性更差,采用上述建库方式已经满足不了配色精度要求。本文在半透明配色中采集多个样点后,首先对其进行无效点去除的预处理,然后对剩余有效点进行三次样条插值,并对低浓度点进行反射率修正使其更符合K-M理论假设的线性关系。实验结果表明,通过上述建库方式能显著提高配色的精度。

关键词: 样条插值, 半透明配色, 反射率修正, 散射系数, 吸收系数

Abstract: The K-M theory points that there is a linear relationship between the K/S values and the dye concentration. In practice this linear relationship is not obvious, so most of the software is logarithmic curve fitting way to establish a database. In semi-transparent situation of dye, the linear relationship of K/S is worse, the above mentioned method has failed to meet color accuracy requirements. In this paper, we collected multiple semi-transparent samples and removed invalid points, then did cubic spline interpolation for the remaining valid points, and corrected reflectivity in low concentration points to make it more consistent with the linear relationship hypothesis of K-M theory. Experimental results show that the above-described method can significantly improve the accuracy of color match.

Key words: spline interpolation, semi-transparent color match, reflectivity correction, scattering coefficient, absorption coefficient

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