Spectroscopy and Spectral Analysis, Volume. 41, Issue 7, 2064(2021)
Research on Vis/NIR Detection of Apple's SSC Based on Multi-Mode Adjustable Optical Mechanism
Figures & Tables(9)
Fig. 1. Schematic diagram of detection methods of diffuse transmittance (a), total transmittance (b) and diffuse reflection (c)
Fig. 3. The original spectra of Apple's diffuse transmittance (
Fig. 4. Wavelength screening using CARS method for pre-processed diffuse reflectance spectrum
Fig. 5. Scatter plot of measured versus predited SSC by the PLS calibration models combining CARS method
Table 1. The range, standard deviation and average value of SSC in the calibration and prediction sets
View tableView in ArticleTable 1. The range, standard deviation and average value of SSC in the calibration and prediction sets
Parameter Data set Samples Mean S.D Range 漫透射 SSC/Brix° Calibration
Prediction90
3013.17
13.071.86
1.998.9~17.3
9.1~17.0全透射 SSC/Brix° Calibration
Prediction90
3013.10
13.271.89
1.888.9~17.3
9.2~17.0漫反射 SSC/Brix° Calibration
Prediction90
3013.10
13.401.94
1.658.9~17.3
9.2~17.2
Table 2. The original spectrum and the spectrum using different pretreatment methods combined with PLS are used to build a model to predict the results of apple SSC
View tableView in ArticleTable 2. The original spectrum and the spectrum using different pretreatment methods combined with PLS are used to build a model to predict the results of apple SSC
Pretreatment LVs Calibration Prediction Rc RMSEC Rp RMSEP 漫透射 Raw
MSC
Normalize
BOC
GFS18
16
15
18
180.980
0.979
0.964
0.982
0.9720.370
0.379
0.488
0.348
0.4360.966
0.960
0.951
0.962
0.9670.516
0.559
0.619
0.550
0.507全透射 Raw
MSC
Normalize
BOC
GFS16
12
12
16
160.974
0.969
0.966
0.971
0.9640.431
0.464
0.484
0.447
0.5000.958
0.913
0.942
0.949
0.9570.562
0.761
0.639
0.610
0.574漫反射 Raw
MSC
Normalize
BOC
GFS14
13
14
13
140.968
0.970
0.984
0.963
0.9630.490
0.473
0.350
0.523
0.5220.947
0.889
0.896
0.947
0.9490.546
0.782
0.762
0.545
0.536混合
三种
光谱Raw
MSC
Normalize
BOC
GFS20
19
20
20
200.837
0.888
0.894
0.838
0.8321.022
0.861
0.836
1.020
1.0380.823
0.856
0.857
0.823
0.8231.069
0.983
0.966
1.068
1.070
Table 3. Modeling results of full spectrum variables and CARS selection variables
View tableView in ArticleTable 3. Modeling results of full spectrum variables and CARS selection variables
Method Number of
variablesLVs Calibration Prediction Rc RMSEC Rp RMSEP 漫反射 Full-spectra PLS
CARS-PLS858
11914
120.963
0.9860.522
0.3230.949
0.9770.536
0.362混合三种光谱 Full-spectra PLS
CARS-PLS1 044
15420
150.894
0.8800.836
0.8890.857
0.8760.966
0.901
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Yan-de LIU, Jun-zheng WANG, Xiao-gang JIANG, Li-sha LI, Xuan HU, Hui-zhen CUI. Research on Vis/NIR Detection of Apple's SSC Based on Multi-Mode Adjustable Optical Mechanism[J]. Spectroscopy and Spectral Analysis, 2021, 41(7): 2064
Paper Information
Category: Research Articles
Received: Jul. 16, 2020
Accepted: --
Published Online: Sep. 8, 2021
The Author Email: LIU Yan-de (jxliuyd@163.com)
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