The Quantitative Study on Chlorophyll Content of <i>Hylocereus polyrhizus</i> Based on Hyperspectral Analysis

Li-jie LI; Yan-bin YUE; Yan-cang WANG; Ze-ying ZHAO; Rui-jun LI; Ke-yan NIE; Ling YUAN

doi:10.3964/j.issn.1000-0593(2021)11-3538-07

Spectroscopy and Spectral Analysis, Volume. 41, Issue 11, 3538(2021)

The Quantitative Study on Chlorophyll Content of Hylocereus polyrhizus Based on Hyperspectral Analysis

Li-jie LI^1、*, Yan-bin YUE^2、2;, Yan-cang WANG^3、3;, Ze-ying ZHAO^2、2;, Rui-jun LI^2、2;, Ke-yan NIE^2、2;, and Ling YUAN^{1、1; *;}

Author Affiliations

¹1. College of Resource and Environment, Southwest University, Chongqing 400716, China

²2. Institute of Science and Technology Information, Guizhou Academy of Agricultural Sciences, Guiyang 550006, China

³3. North China Institute of Aerospace Engineering, Langfang 065000, China

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Figures & Tables(8)

Fig. 1. Spectral measurement of Hylocereus polyrhizus branch

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Fig. 2. Reflectance spectra (a) and absorption peak depth (b) of stems of Hylocereus polyrhizus under different nitrogen levels

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Fig. 3. Matrix of determination coefficient of spectrum and chlorophyll content

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Fig. 4. Scatter plot of measured and predicted values based on first order differential transformation

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Fig. 5. Scatter plot of measured and predicted values based on continuous wavelet transform

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Table 1. The statistical description of chlorophyll contents of Hylocereus polyrhizus branches
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Table 1. The statistical description of chlorophyll contents of Hylocereus polyrhizus branches
Statistic Number Minimum Maximum Mean Standard
deviation
CHL/% 96 0.041 0.359 0.161 0.060

Table 2. The list of estimation models for chlorophyll content of Hylocereus polyrhizus stem based on mathematical transformation

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Table 2. The list of estimation models for chlorophyll content of Hylocereus polyrhizus stem based on mathematical transformation

变换形式	波段	模型	建模		验证
变换形式	波段	模型	$R_{建模}^{2}$	RMSE	$R_{验证}^{2}$	RMSE	RPD
R	969, 1 000	Y=0.079+7.046X₉₆₉-6.560X_{1 000}	0.509	0.4	0.382	0.052	1.074
R'	735, 1 645	Y=2 572.400X₇₃₅+74 903.5X_{1 645}	0.609	0.036	0.625	0.048	1.238
Log(R)	969, 1 000	Y=0.094+4.204X₉₆₉-4.134X_{1 000}	0.491	0.041	0.383	0.054	1.033
Log(R)'	673, 756, 996	Y=0.300+1 342.700X₆₇₃+5 344.200X₇₅₆-12 163.4X₉₉₆	0.601	0.036	0.630	0.07	0.874
1/R	969, 1 000	Y=0.230-0.023X₉₆₉+0.023X_{1 000}	0.455	0.042	0.272	0.057	0.98
(1/R)'	996, 1 074	Y=0.320+31.427X₉₉₆-96.869X_{1 074}	0.445	0.043	0.269	0.058	0.989

Table 3. The estimation model list of chlorophyll content in Hylocereus polyrhizus stem based on binary wavelet

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Table 3. The estimation model list of chlorophyll content in Hylocereus polyrhizus stem based on binary wavelet

变换形式	波段	模型	建模		验证
变换形式	波段	模型	$R_{建模}^{2}$	RMSE	$R_{验证}^{2}$	RMSE	RPD
R	969, 1 000	Y=0.079+7.046X₉₆₉-6.560X_{1 000}	0.509	0.40	0.382	0.052	1.074
H₁	740, 830	Y=0.098+21.110X₇₄₀-123.046X₈₃₀	0.654	0.034	0.626	0.056	0.991
H₂	742, 1 312	Y=-0.059+4.001X₇₄₂+31.806X_{1 312}	0.657	0.034	0.639	0.040	1.336
H₃	761, 1 311	Y=-0.012+1.883X₇₆₁+5.434X_{1 311}	0.629	0.035	0.628	0.040	1.317
H₄	761, 1 134	Y= -0.026+0.353X₇₆₁+0.975X_{1 134}	0.621	0.035	0.609	0.041	1.284
H₅	702, 1 131	Y=-0.047-0.118 0X₇₀₂+0.656X_{1 131}	0.590	0.037	0.579	0.043	1.237
H₆	587, 1 561	Y=-0.059-0.122X₅₈₇-1.847X_{1 561}	0.584	0.037	0.624	0.041	1.300
H₇	688, 1 595	Y=-0.017-0.116X₆₈₈-0.168X_{1 595}	0.609	0.036	0.677	0.038	1.409
H₈	568, 1 206	Y=-0.006-0.052X₅₆₈+0.035X_{1 206}	0.529	0.039	0.691	0.038	1.392
H₉	358, 1 198	Y=-0.038-0.091X₃₅₈+0.011X_{1 198}	0.479	0.041	0.609	0.042	1.254
H₁₀	1 594, 1 742	Y=-0.092+0.019X_{1 594}+0.031X_{1 742}	0.336	0.047	0.202	0.060	0.887
ALL	L₁-740, L₁-1 347, L₄-698	Y=-0.075+58.988 $X_{L_{1} ⁃ 740}$ -243.373 $X_{L_{1} - 1 347}$ + 0.596 $X_{L_{4} - 698}$	0.752	0.029	0.678	0.037	1.652

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Li-jie LI, Yan-bin YUE, Yan-cang WANG, Ze-ying ZHAO, Rui-jun LI, Ke-yan NIE, Ling YUAN. The Quantitative Study on Chlorophyll Content of Hylocereus polyrhizus Based on Hyperspectral Analysis[J]. Spectroscopy and Spectral Analysis, 2021, 41(11): 3538

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Paper Information

Category: Orginal Article

Received: May. 25, 2021

Accepted: --

Published Online: Dec. 17, 2021

The Author Email: LI Li-jie (32051185@qq.com)

DOI:10.3964/j.issn.1000-0593(2021)11-3538-07

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. The statistical description of chlorophyll contents of Hylocereus polyrhizus branches

Table 1. The statistical description of chlorophyll contents of Hylocereus polyrhizus branches

Table 2. The list of estimation models for chlorophyll content of Hylocereus polyrhizus stem based on mathematical transformation

Table 2. The list of estimation models for chlorophyll content of Hylocereus polyrhizus stem based on mathematical transformation

Table 3. The estimation model list of chlorophyll content in Hylocereus polyrhizus stem based on binary wavelet

Table 3. The estimation model list of chlorophyll content in Hylocereus polyrhizus stem based on binary wavelet