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西南烟区烤烟表面颜色特征量化分析

2017-06-05王改丽甄焕菊郑宪滨于建军李悦魏

山东农业科学 2017年5期

王改丽 甄焕菊 郑宪滨 于建军 李悦 魏春阳 胡建军

摘要:

为探析西南烟区不同部位烤烟表面颜色特征,采用Lab颜色空间表征方法对西南烟区20个植烟县不同部位的烤烟表面颜色进行量化分析。结果表明:①西南烟区烤烟下部叶的明度(L)和黄度(b)最高,红度(a)以上部叶最高,中部叶表面颜色特征参数变异程度最大;②随烟叶部位上升,西南烟区烤烟表面颜色明度(L)和黄度(b)逐渐降低,而红度(a)逐渐升高;③西南烟区烤烟表面颜色的明度(L)与黄度(b)、颜色饱和度(C)存在显著或极显著正相关,与红度(a)存在极显著负相关。

关键词:烤烟;颜色;相关分析;量化分析;西南烟区

中图分类号:S572文献标识号:A文章编号:1001-4942(2017)05-0030-04

Quantitative Analysis on Surface Color Characteristics

of Flue-Cured Tobacco in Southwest Tobacco-Growing Area

Wang Gaili1, Zhen Huanju1, Zheng Xianbin1, Yu Jianjun2, Li Yue2, Wei Chunyang1,Hu Jianjun1

(1. College of Further Education for Staffs, China Tobacco Corporation, Zhengzhou 450008, China;

2. College of Tobacco, Henan Agricultural University, Zhengzhou 450002, China)

AbstractIn order to analyze the surface color characteristics in different parts of flue-cured tobacco in southwest tobacco-growing area, the quantitative analysis on surface color of flue-cured tobacco in 20 tobacco-planting counties was conducted using L a b color space characterization method. The results showed that the brightness (L) and yellowness (b) of the lower leaves were the highest, and the reddishness (a) of the upper leaves was the highest. The central leaves had the largest variation on tobacco surface color feature parameters. Along with the rise of leaf position, the brightness (L) and yellowness (b) of flue-cured tobacco decreased gradually, while the reddishness (a) increased. There were significant or very significant positive correlation between brightness (L) with yellowness (b) and color saturation (C),while very significant negative correlation with reddishness (a) in southwest tobacco-growing area.

KeywordsFlue-cured tobacco; Color; Correlation analysis; Quantitative analysis;Southwest tobacco-growing area

烤煙外观特征的识别主要是依靠眼观、手摸、鼻闻等感官判断完成[1] ,颜色是烟叶外观质量的重要特征[2-4]。很多学者对烤烟外观特征区域性差异及区域规划已做了深入研究[5-7],结果表明,由于生态环境条件、栽培调制技术和品种的差异,烤烟外观区域特征较为明显,烤后烟叶的颜色特征也存在一定的差异性[8-10]。目前,基于分光光谱仪测定L、a、b和C颜色空间分布参数的研究已在多种行业和领域得到广泛应用,Lab颜色空间分布与人体视觉对颜色的感觉相一致[11]。颜色分形维数可以作为烤烟按颜色分类的指标,能够准确描述图像颜色分布特征[12]。过伟民等[13]研究表明,烤烟表面颜色空间分布与烤烟类胡萝卜素关系密切。魏春阳等[14]对我国烤烟C3F等级烟叶表面颜色特征参数进行聚类分析后指出,聚类分析中各类烟叶表面颜色特征与实际生产情况基本一致,指出Lab颜色空间分布特征可以用来表征颜色指标。……

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