Spectroscopy and Spectral Analysis, Volume. 41, Issue 8, 2556(2021)
Chlorophyll Content Estimation of Northeast Japonica Rice Based on Improved Feature Band Selection and Hybrid Integrated Modeling
Figures & Tables(14)
Fig. 5. Feature band selection results based on SPA algorithm
(a): Number of the best feature bands in the sample model; (b): Distribution of extracted feature bands
Fig. 7. Feature band selection results based on RF and fpb-RF algorithms
(a): RF algorithm; (b): fpb-RF algorithm
Fig. 8. GPR-P model prediction results of different feature band extraction methods
(a): CC-SPA algorithm; (b): RF algorithm; (c): fpb-RF algorithm
Fig. 9. PLSR model prediction results of different feature band extraction methods
(a): CC-SPA algorithm; (b): RF algorithm; (c): fpb-RF algorithm
Fig. 10. LSSVM model prediction results of different feature band extraction methods
(a): CC-SPA algorithm; (b): RF algorithm; (c): fpb-RF algorithm
Fig. 11. BP model prediction results of different feature band extraction methods
(a): CC-SPA algorithm; (b): RF algorithm; (c): fpb-RF algorithm
Table 1. Statistics of chlorophyll content in rice
View tableView in ArticleTable 1. Statistics of chlorophyll content in rice
样本集 样本数 最大值/
(mg·L-1)最小值/
(mg·L-1)平均值/
(mg·L-1)标准差/
(mg·L-1)总样本 102 12.811 6 1.702 2 6.772 9 2.338 6 训练集 77 12.811 6 1.702 2 6.700 6 2.416 8 测试集 25 11.686 3 1.934 1 6.989 7 2.117 8
Table 2. Optimization results of RF and fpb-RF algorithms
View tableView in ArticleTable 2. Optimization results of RF and fpb-RF algorithms
方法 迭代次数 收敛时间/min 均方根误差 RF 5 000 15.2 1.314 0 fpb-RF 800 2.1 1.232 8
Table 3. Evaluation index of prediction model
View tableView in ArticleTable 3. Evaluation index of prediction model
特征波段
选取方法模型 R2 RMSE 建模集 测试集 建模集 测试集 CC-SPA CC-SPA-PLSR 0.670 7 0.592 5 1.377 9 1.398 2 RF RF-PLSR 0.690 6 0.701 2 1.314 0 1.330 4 fpb-RF fpb-RF-PLSR 0.717 9 0.704 7 1.232 8 1.275 5 CC-SPA CC-SPA-LSSVM 0.736 3 0.739 2 1.215 1 1.156 9 RF RF-LSSVM 0.760 1 0.757 9 1.184 5 1.071 7 fpb-RF fpb-RF-LSSVM 0.775 2 0.767 5 1.067 6 1.025 6 CC-SPA CC-SPA-BP 0.740 5 0.746 4 1.207 2 1.066 0 RF RF-BP 0.763 9 0.765 0 1.184 1 1.048 9 fpb-RF fpb-RF-PB 0.770 4 0.766 2 1.162 8 1.022 3 CC-SPA CC-SPA-GPR-P 0.755 3 0.760 1 1.090 2 1.035 7 RF RF-GPR-P 0.776 8 0.774 5 1.012 2 0.959 7 fpb-RF fpb-RF-GPR-P 0.781 5 0.779 6 0.904 1 0.928 3
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Tan LIU, Tong-yu XU, Feng-hua YU, Qing-yun YUAN, Zhong-hui GUO, Bo XU. Chlorophyll Content Estimation of Northeast Japonica Rice Based on Improved Feature Band Selection and Hybrid Integrated Modeling[J]. Spectroscopy and Spectral Analysis, 2021, 41(8): 2556
Paper Information
Category: Research Articles
Received: Jun. 4, 2020
Accepted: --
Published Online: Sep. 8, 2021
The Author Email: LIU Tan (liutan_0822@126.com)
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