初烤烟叶不同区位色差变化及Fisher最优分割法分析  

Chromatic aberrations of different parts of cured tobacco leaf by Fisher optimal segmentation analysis

作　　者：高辉 杨晶津[2] 王慧[2] 王玉真[2] 李思源 刘继辉[2] 华一崑[2] 汪显国[2] 高占勇[2] 刘静 GAO Hui;YANG Jingjin;WANG Hui;WANG Yuzhen;LI Siyuan;LIU Jihui;HUA Yikun;WANG Xianguo;GAO Zhanyong;LIU Jing(Yunnan Comtestor Technology Analysis Co.,Ltd.,Kunming 650106,China;HongyunHonghe Tobacco(Group)Co.,Ltd.,Kunming 650231,China)

机构地区：[1]云南同创检测技术股份有限公司,昆明市650106 [2]红云红河烟草(集团)有限责任公司,昆明市650231

出　　处：《烟草科技》2020年第9期62-68,共7页Tobacco Science & Technology

基　　金：国家烟草专卖局重大专项项目“品牌导向的‘大工艺、大模块’打叶复烤特色工艺研究与应用”(110201901030,FK-01);云南中烟工业有限责任公司重大专项项目“云烟品牌核心原料精细化加工工艺技术研究”(2017GY04)。

摘　　要：为探索色差法在烟叶分切打叶中的应用,选择K326 B2F、C3F、X2F初烤烟叶作为试验对象,分别将3个部位的烟叶去除叶柄后纵向平均分切成10个区位,利用色差计测定每个分切区位的色差值L*(明度值)、a*(红度值)、b*(黄度值),采用回归分析法研究K326烟叶不同区位色差值的变化趋势,通过Fisher最优分割法和感官评吸法分析各部位烟叶适宜的分段比例和感官质量差异。结果表明:①对于K326 3个部位的初烤烟叶,从叶基到叶尖,L*值呈逐渐降低的抛物线形变化趋势,a*、b*、△E(总色差)值呈先升高后降低的抛物线形变化趋势。②基于标准化的色差值矩阵,利用Fisher最优分割法确定了K326 3个部位初烤烟叶的最佳分段比例(叶基∶叶中∶叶尖):B2F为20%∶50%∶30%、C3F为30%∶50%∶20%、X2F(叶基∶近基∶叶中∶叶尖)为10%∶30%∶40%∶20%。③三点法检验结果表明,分切后各段烟叶之间的整体感官品质均存在显著差异,说明色差法结合Fisher最优分割法能将同一烟叶品质差异较大的区位有效分离。In order to evaluate the suitability of chromatic aberration as a method to monitor tobacco leaf cutting,the B2 F,C3 F and X2 F cured K326 tobacco leaves were selected as test samples.After removing the petiole,a tobacco leaf was longitudinally divided into 10 locations at equal length.The lightness value(L*),redness value(a*),yellowness value(b*)at each location were determined by a colorimeter.Regression analysis was used to study the variations of chromatic aberration values at different locations of K326.Appropriate sectioning proportion and sensory quality of tobacco leaves from different stalk positions were analyzed by Fishers optimal segmentation method and sensory evaluation respectively.The results showed that︰1)For the upper,middle,lower leaves of cured K326,from the base to the tip,the L*value presented a decreasing parabolic trend,and the values of a*,b*and△E(total chromatic aberration)presented an increasing parabolic trend first and then a decreasing one.2)On the basis of the standardized chromatic aberration matrix,the optimal sectioning proportions for cured K326 were determined by Fisher optimal segmentation method as:20%∶50%∶30%for B2 F(base∶middle∶tip);30%∶50%∶20%for C3 F(base∶middle∶tip),and 10%∶30%∶40%∶20%for X2 F(base∶near base∶middle∶tip),respectively.3)The results of three-point test indicated that the overall sensory quality differed significantly at the different locations.It was suggested that the chromatic aberration combined with Fisher optimal segmentation could effectively separate the locations with greatest sensory quality difference of the same leaf.

关 键 词：初烤烟叶 区位 色差 Fisher最优分割法 感官品质 L~*(明度值) a~*(红度值) b~*(黄度值) 

分 类 号：S572[农业科学—烟草工业]