利用计算机视觉研究白茶加工中色泽的变化  

Detection of color change of white tea in processing by computer vision technology

作　　者：郝志龙[1,2] 赵爱凤[2] 金心怡[1,2] 谭智峰[3] 江丽萍[1] 

机构地区：[1]福建农林大学园艺学院 [2]福建农林大学茶叶研究所 [3]福建农林大学计算机与信息学院,福建福州350002

出　　处：《福建农林大学学报（自然科学版）》2010年第3期325-329,共5页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金：国家科技支撑计划资助项目(2007BAD07B02);福建省科技厅重点资助项目(2007N0008)

摘　　要：利用计算机视觉技术把茶叶色泽指标的模拟量转换成数字量,研究白茶加工中色泽的变化.确定采集的图像文件大小为1.0 MB,光照条件为明亮的室内开闪光灯,摊叶量保证覆盖底板颜色.并采用改进后的H IS模型研究白茶加工中茶叶色泽的变化,结果表明,加工过程茶叶色泽变暗,色调由鲜绿色向棕褐色转变,不同萎凋方式萎凋叶的色调存在差异.明度总体上呈下降趋势,表明茶叶颜色逐渐变暗,而空调萎凋叶的色泽较亮.萎凋叶饱和度先降后升,表明茶叶颜色先退色后加深.空调萎凋叶饱和度较高,毛茶色泽差异不明显.The color change of white tea in processing was researched by transforming simulation quantity of tea color index into digital quantity by computer vision technology. The conditions of acquisiting image were determined,the results were as follows： image document size was 1.0 MB,outside light condition was bright flashing light in room,tea spreading quantity covered the background color entirely.The color change of white tea in processing was researched by use of improved HIS model,the results showed the color of white tea in processing turned to dark,and its hue changed to chocolate brown from bright green,there was difference in the hue of withering leaf by different withering ways.Brilliance showed drop tendency,which indicated the color changed to dark gradually,the color of withering leaf was bright by the method of air conditioning withering.Saturation decreased firstly and then increased,which indicated the color firstly discolorated and then deepened in white tea processing,saturation value of withering leaf was higher by the method of air conditioning withering,and the difference of raw tea color was not obvious.

关 键 词：计算机视觉 白茶 加工 色泽变化 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]