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基于Color-Eye 7000A分光光谱仪,采用L*a*b*均匀颜色空间的颜色表征方法对我国57个产地C3F等级烟叶表面颜色进行测量和分析,并对测量数据进行了方差分析、聚类分析和对应分析。结果表明:①我国烤烟C3F等级烟叶表面颜色色空间分布特征为:L*50~64,a*13~19,b*41~55,C*44~58,不同产区烤烟C3F等级烟叶表面颜色特征参数存在极显著差异;②我国不同产区烤烟C3F等级烟叶表面颜色特征分为4类,并呈区域性分布,第一类主要集中在东南烟区,第二类主要集中在黄淮和北方烟区,第三类主要集中在四川产区,第四类主要集中在云南、贵州、重庆和湖北产区,聚类结果与当前烟叶颜色主观定性判定结果基本吻合;③第一类和第三类产地烟叶与红绿色品指数a*较为邻近,第四类和第三类产地烟叶与黄蓝色品指数b*较为邻近,第四类和第二类产地烟叶与明度L*较为邻近,第三类和第四类产地烟叶与色饱和度C*较为邻近;颜色特征参数与样品产地间的对应关系与聚类分析结果中各类烟叶表面颜色色空间分布特征一致。
Based on the Color-Eye 7000A spectrophotometer, the color of L * a * b * uniform color space was used to measure and analyze the color of C3F tobacco leaves in 57 producing areas in China. The measured data were analyzed by variance, cluster analysis and Corresponding analysis. The results showed as follows: ①The spatial color distribution characteristics of surface color of C3F Flue-Cured Tobacco in China were: L * 50-64, a * 13-19, b * 41-55, C * 44-58, There were extremely significant differences in the characteristic parameters; (2) The surface color characteristics of C3F tobacco leaves in different producing areas of China were divided into four categories and showed a regional distribution, the first category mainly concentrated in the southeast tobacco area, the second category mainly concentrated in Huanghuai and northern The third category is mainly concentrated in the producing areas of Sichuan Province. The fourth category is mainly concentrated in the producing areas of Yunnan, Guizhou, Chongqing and Hubei. The clustering results are basically consistent with the subjective and qualitative findings of the current tobacco leaf color. The first and third The tobacco leaves of the origin areas are relatively close to the red and green products index a *, while the tobacco leaves of the fourth and third origins are relatively close to the index b * of the yellow-blue goods, while the tobacco leaves of the fourth and the second origin are relatively close to the lightness L * The three types and four types of producing areas have relatively close relationship with the color saturation C *. The corresponding relationship between the color characteristic parameters and the origin of the samples is consistent with the spatial distribution of the color colors of the various types of tobacco in the clustering analysis.