基于图像处理技术四川黑茶叶绿素、茶褐素含量检测.pdfVIP

基于图像处理技术的四川黑茶叶绿素、茶褐素含量检测 邹 瑶，齐桂年 ，刘婷婷，李 伟，黄亚芳 ( 四川农业大学园艺学院，四川 雅安 625014) 摘要：探讨将视觉图像处理技术应用于四川黑茶渥堆过程中茶叶叶绿素、茶褐素含量快速检测的可能。采用扫描 仪（CCD ）及装于电脑的Photoshop CS5 软件采集四川黑茶渥堆样图片并分析，检测 HSB 和 RGB 色彩模式参数 与四川黑茶中叶绿素、茶褐素含量的相关性并建立回归方程。结果显示，四川黑茶渥堆过程中，叶绿素、茶褐素 含量出现了较大的变化。R 、G、B 、H 、S 等颜色特征参数亦出现了相应的变化, 其中 H 参数与叶绿素含量存在 高度的正相关（r=0.962 ， p ＜0.05 ）, 而茶褐素含量与 RGB 色彩模式参数的数学转换形式 RG/(R+G+B)2 存在高 度的负相关（r=-0.957 ，p ＜0.05 ）。基于上述颜色特征参数建立的回归模型（chlorophyll =0.0453H2-13.856H+1062.6; theabrownin =853006 （RG/(R+G+B)2 2 2 ） -178298 （RG/(R+G+B) ）+9319.5 ）具有较高的拟合度可以用于预测四川 黑茶渥堆过程中茶叶中叶绿素和茶褐素的含量，预测误差分别为-8.923%和 5.8% 。 关键词：四川黑茶；图像处理技术；叶绿素；茶褐素；渥堆 Determination of Chlorophyll and Theabrownin Levels of Sichuan Dark Tea using Image Processing ZOU Yao, QI Guinian, LIU Tingting, LI Wei, HUANG Yafang (College of Horticulture, Sichuan Agriculture University, Ya’an, 625014, China) Abstract: A new method quantifying the chlorophyll and theabrownin of Sichuan dark tea rapidly based on the image processing was established. The correlations between the color parameters of RGB and HSB mode obtained from the tea sample images by employing the scanner and Photoshop CS5 software and the chlorophyll and theabrownin levels were analyzed. The regression models were established to predict chlorophyll and theabrownin levels through the color parameters. The results showed that the levels of chlorophyll and theabrownin were significantly correlated with the parameters of H and 2 RG/(R+G+B) respectively(r=0.962,p ＜0.05; r=-0.957，p ＜0.05). The regression models established had the best goodness of fit, the prediction errors of them were -8.923% and 5.8%respectively. Keywords: