中国烟草学报2024，Vol.30Issue(1)：36-45,10.DOI:10.16472/j.chinatobacco.2023.T0014
基于高光谱成像技术的烤烟上部烟叶成熟度光谱特征分析及判别模型构建应用研究
Spectral characteristics analysis and discriminating model construction of flue-cured upper tobacco leaves with different maturity based on hyperspectral imaging technology
摘要
Abstract
[Objective]The purpose of this study was to investigate the hyperspectral characteristics of upper tobacco leaves at different-maturity levels and the feasibility of intelligent discrimination.[Methods]In this study,a portable hyperspectral instrument was used to collect the hyperspectral imagines of upper tobacco leaves of three different-maturity levels(pre-maturity(SS),maturity(CS)and post-maturity(GS))and extracted their spectral data.Their spectral characteristics were studied by using correlation analysis,principal components analysis and variation analysis,and 5 models(SVM,KNN,RF,LightGBM and XGBoost)were constructed for evaluating their discriminant performances of tobacco leaf maturity.[Results]The results showed that:(1)there was a strong correlation among the bands within the visible light(400-720 nm)or the near infrared(750-1000 nm)regions,while the correlation between the two regions was weak.(2)the 5 principal components(PC1-PC5)with eigenvalues greater than 1 almost contained all the hyperspectral information.The spectral reflectance characteristics of upper tobacco leaves with different maturity levels showed significant difference in visible light,red edge and part of near infrared region(950-1000 nm).(3)Among the 5 models,SVM has the best evaluation,with precision,recall and Fl scores for the samples in 2021 above 0.95,and for the samples in 2022 and 2021+2022 above 0.93 and 0.92 respectively.[Conclusion]The hyperspectral data of the upper tobacco leaves exhibit multicollinearity,which has excellent dimensionality reduction effects.Moreover,there are significant differences in spectral reflectance characteristics at different maturity levels.The SVM discriminant performance has good stability across different years and can be used for determining the maturity of upper tobacco leaves.关键词
便携式高光谱仪/上部烟叶/成熟度/光谱特征/模型构建及应用Key words
portable hyperspectral imager/upper tobacco leaf/maturity/spectral characteristics/model construction and application引用本文复制引用
邓建强,王大彬,乾艳,尹忠春,彭五星,李富强,任晓红..基于高光谱成像技术的烤烟上部烟叶成熟度光谱特征分析及判别模型构建应用研究[J].中国烟草学报,2024,30(1):36-45,10.基金项目
湖北省烟草公司科技项目"基于高光谱成像的中棵烟长势长相及上部烟成熟度判别技术研究"(027Y2021-025) （027Y2021-025）
