照明与观察几何条件对镀铝纸颜色测量的影响

何成栋; 万晓霞; 黄新国; 陈华培; 欧立国; 杨瑞平; 赵德方

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照明与观察几何条件对镀铝纸颜色测量的影响
何成栋¹, 万晓霞¹, 黄新国^2,3,4, 陈华培⁵, 欧立国⁵, 杨瑞平¹, 赵德方¹
1.武汉大学，武汉 430079;2.1.武汉大学，武汉 430079;3.2.湖南工业大学，株洲，412007;4.3.时代出版传媒股份有限公司，合肥 230071;5.常德金鹏印务有限公司，常德 415000

摘要:

目的分析不同照明/观察条件下镀铝纸的色度与光谱值，从而优化不同几何条件在镀铝纸颜色测量中的应用。方法使用45°/0°，SCE，SCI等3种测量条件获取不同镀铝纸的颜色信息，并针对镀铝纸配色和镀铝纸颜色心理属性一致性对其进行对比分析。结果 45°/0°和SCE条件下的测量数据不符合镀铝纸配色要求；同一样张测得反射率、亮度与色度值大小规律为：SCI>SCE>45°/0°，不同样张在SCE条件下测得的亮度差（△L*）、色度差（△a*，△b*）以及色差（△E）均介于SCI与45°/0°之间，这是由于SCE测量颜色成分中包含了部分镜面反射光。结论 45°/0°和SCE不可作为镀铝纸配色中颜色测量条件，45°/0°较SCE更适合作为镀铝纸表观色测量条件，更符合颜色视觉评价，不同镀铝纸在SCI条件下测量数据差与在45°/0°条件下测量数据差同时较小时，说明两者一致性好。

关键词: 照明/观察镀铝纸颜色测量

DOI：

分类号:TS801.8

基金项目:国家自然科学基金（61275172）；安徽省博士后研究人员科研活动经费（2015B060）

The Influence of Illuminant/Geometric Observation Conditions on Color Measurement of Silver-foiled Paper

HE Cheng-dong¹, WAN Xiao-xia¹, HUANG Xin-guo^2,3,4, CHEN Hua-pei⁵, OU Li-guo⁵, YANG Rui-ping¹, ZHAO De-fang¹

1.Wuhan University, Wuhan 430079, China;2.1.Wuhan University, Wuhan 430079, China;3.2.Hunan University of Technology, Zhuzhou 412007, China;4.3.Time Publishing and Media Co., Ltd., Hefei 230071, China;5.Changde Jinpeng Printing Co., Ltd., Changde 415000, China

Abstract:

In order to analyze the chroma and spectra of silver-foiled paper under different Illuminant/geometric observation conditions and further to optimize the application of different geometric conditions in color measurement of silver-foiled paper, color data on silver-foil paper were obtained under three geometric conditions: 45°/0°, SCI and SCE, and then the data were analyzed in computer color matching and the consistency of color psychometric attributes on silver-foiled paper. The spectral reflectance data of silver foil paper under 45°/0° and SCE did not meet the requirement of computer color matching. The descent order of the reflectance, lightness and chroma of the same sheet of silver-foiled paper was: SCI>SCE>45°/0°. The value of △L*, △a*, △b* and △E under SCE was between that under SCI and 45°/0°, resulting from the remnant specular light in the measured light. In conclusion, 45°/0° and SCE is infeasible as the measurement condition of silver foil paper in computer color matching. 45°/0° is a better measuring geometry and matches well with the visual assessment for the silver-foiled paper compared to SCE. The consistency of different silver-foiled papers is better when the D-value of lightness and chroma is smaller respectively under 45°/0° and SCI.

Key words: illuminant/observation silver-foiled paper color measurement