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烘烤过程中烘烤环境对烤烟外观特征的影响
宋朝鹏1, 路晓崇1, 裴晓东,等2
1.河南农业大学 烟草学院;2.湖南省烟草公司长沙市公司
摘要:
【目的】了解烤烟烘烤过程中烘烤环境对烟叶外观特征变化的影响,为烟叶精准化烘烤的实现提供理论依据。【方法】利用色差仪提取烟叶的颜色特征值,用Matlab2015b获取烟叶纹理特征值,然后对烘烤过程中烟叶颜色特征指标和纹理特征指标的变化进行分析,并运用典型相关分析法对烘烤过程中烘烤环境指标(温度、叶温、水汽压差、相对湿度、风速、风压)与颜色指标(明度、红度、黄度、饱和度、色相角)、纹理指标(能量、熵、惯性矩、相关度)的关系进行分析。【结果】随着烘烤的进行,烟叶颜色特征值的变化均呈上升趋势,且正反面变化规律相似;烟叶纹理特征值中纹理能量和相关度不断减小,纹理熵和惯性矩不断增加,且在42~46 ℃变化幅度较大;叶温对烟叶颜色的色相角和正面黄度有较大影响;烤房温度主要对烟叶颜色的明度、饱和度、色相角和黄度有较大影响,而相对湿度对烟叶颜色的红度有较大影响,但是温度和相对湿度均对烟叶纹理的能量、相关度和熵有较大影响,风压对烟叶纹理惯性矩有较大影响,而其他环境指标对烟叶颜色和形态纹理变化的影响较小。【结论】不同的烘烤环境指标对烟叶颜色和纹理的变化有不同程度影响,可依据研究结果及烟叶特色适当调控烟叶的颜色与形态变化。
关键词:  烤烟  烘烤环境  颜色特征  纹理特征  典型相关分析
DOI:
分类号:
基金项目:中国烟草总公司项目“浓香型烤烟调制关键技术研究”(Ts-01-2011006)
Influence of curing environment on tobacco appearance characteristics during curing process
SONG Chaopeng,LU Xiaochong,PEI Xiaodong,et al
Abstract:
【Objective】This study investigated the influence of curing environment on tobacco morphology during curing process to provide theoretical basis for realization of precise curing. 【Method】The chromatic instrument was used to obtain color feature and Matlab2015b was used to obtain texture feature,and the canonical correlation was conducted to analyze the relationship between curing environment variables (temperature,leaf temperature,vapor pressure difference,relative humidity,wind speed,and wind pressure) with color features (lightness,redness,yellowness,saturation,and hue angle) and texture features (energy,entropy,moment of inertia,and correlation degree).【Result】The change of tobacco color feature values showed an upward trend, and the morphology features of front and back had a similar trend. The tobacco texture energy and correlation degree decreased,while entropy and moment of inertia increased,and the changes were more substantial at 42-46 ℃.The leaf temperature had great effect on hue angle and yellowness of front,the temperature in curing barn affected lightness,saturation,hue angle and yellowness.Relative humidity had great influence on redness, and both temperature and relative humidity had great influence on texture energy,correlation degree, and entropy of tobacco.Wind pressure had high relationship with texture inertia,but other variables had minor effect on color and texture.【Conclusion】Different curing environmental variables had different effects on color and texture of tobacco leaves. 
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