Detection of Rice Sheath Blight Disease Index Based on Split-Window Gram-Schmidt Transformation and PSO-SVR Algorithm

Wen XIAO; Ying-li CAO; Shuai FENG; Ya-di LIU; Kai-lun JIANG; Zheng-xin YU; Li YAN

doi:10.3964/j.issn.1000-0593(2021)07-2181-07

Spectroscopy and Spectral Analysis, Volume. 41, Issue 7, 2181(2021)

Detection of Rice Sheath Blight Disease Index Based on Split-Window Gram-Schmidt Transformation and PSO-SVR Algorithm

Wen XIAO^1;, Ying-li CAO^{1; 2; *;}, Shuai FENG^1;, Ya-di LIU^1;, Kai-lun JIANG^1;, Zheng-xin YU^1;, and Li YAN^1;

Author Affiliations

1. College of Information and Electrical Engineering, Shenyang Agricultural University, Shenyang 110161, China

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Figures & Tables(6)

Fig. 1. Distribution of 20 rice plots

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Fig. 2. The original spectral reflectance curves of rice under the condition of three degrees of rice sheath blight
(a): Low altitude remote sensing canopy; (b): Ground canopy

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Fig. 3. First-order derivative spectral reflectance curves of rice under the condition of three degrees of rice sheath blight
(a): Low altitude remote sensing canopy; (b): Ground canopy

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Fig. 4. Inverse-log spectral reflectance curves of rice under the condition of three degrees of rice sheath blight
(a): Low altitude remote sensing canopy; (b): Ground canopy

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Fig. 5. Main base and characteristic wavelength based on window dividing Gram-Schmidt transform
(a): IRS of the low altitude remote sensing canopy; (b): FDRS of the ground canopy

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Table 1. The result of regression modeling with support vector machine

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Table 1. The result of regression modeling with support vector machine

降维方法	光谱变换	SVR_R²	SVR_RMSE	PSO-SVR_R²	PSO-SVR_RMSE
分窗Gram-Schmidt 变换	低空冠层ORS	0.658	0.260	0.683	0.201
	低空冠层FDRS	0.665	0.225	0.700	0.160
	低空冠层IRS	0.681	0.235	0.731	0.151
	地面冠层ORS	0.671	0.270	0.701	0.159
	地面冠层FDRS	0.765	0.184	0.778	0.147
	地面冠层IRS	0.707	0.207	0.752	0.149
主成分分析 PCA	低空冠层ORS	0.591	0.502	0.621	0.440
	低空冠层FDRS	0.661	0.276	0.675	0.218
	低空冠层IRS	0.681	0.228	0.705	0.160
	地面冠层ORS	0.615	0.472	0.65	0.424
	地面冠层FDRS	0.682	0.214	0.715	0.152
	地面冠层IRS	0.645	0.308	0.672	0.264
连续投影法 SPA	低空冠层ORS	0.514	0.572	0.596	0.465
	低空冠层FDRS	0.627	0.483	0.658	0.372
	低空冠层IRS	0.652	0.337	0.670	0.289
	地面冠层ORS	0.574	0.582	0.649	0.433
	地面冠层FDRS	0.646	0.262	0.691	0.168
	地面冠层IRS	0.579	0.463	0.660	0.359

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Wen XIAO, Ying-li CAO, Shuai FENG, Ya-di LIU, Kai-lun JIANG, Zheng-xin YU, Li YAN. Detection of Rice Sheath Blight Disease Index Based on Split-Window Gram-Schmidt Transformation and PSO-SVR Algorithm[J]. Spectroscopy and Spectral Analysis, 2021, 41(7): 2181

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Paper Information

Category: Research Articles

Received: Jul. 2, 2020

Accepted: --

Published Online: Sep. 8, 2021

The Author Email:

DOI:10.3964/j.issn.1000-0593(2021)07-2181-07

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