Spectroscopy and Spectral Analysis, Volume. 42, Issue 11, 3373(2022)
Study on Optimization of Apple Sugar Degree and Illumination Position Based on Near-Infrared Technology
Figures & Tables(10)
Fig. 2. Schematic diagram of light rays go through the apple along two paths designed for near infrared diffuse transmission experiment
Fig. 3. Schematic diagram of intensity distributions of light go through the apple at different illumination positions based on near infrared diffuse transmission
Fig. 4. Linear fitting between real and predicted sugar contents of msc-pls
Fig. 5. Schematic diagram of linear fitting between true value and predicted value of sugar content for external verification
Table 1. Statistical results of physical and chemical indices of apple
View tableView in ArticleTable 1. Statistical results of physical and chemical indices of apple
照射
位置数据集 样品数
/个果径范围
/mm糖度范围
/(°Brix)上部 训练集
预测集188
6273±2
73±28.2~16.8
8.8~16.2斜上部 训练集
预测集188
6273±2
73±29.1~16.6
10.5~16.6
Table 2. Ranges and average values of SSC in calibration set and prediction set
View tableView in ArticleTable 2. Ranges and average values of SSC in calibration set and prediction set
位置 Parameter Data Set Samples Mean Range 上部 SSC/(°Brix) Calibration
Prediction188
6212.969 4
13.180 78.2~16.8
8.8~16.2斜上部 SSC/(°Brix) Calibration
Prediction188
6213.259 7
13.373 99.1~16.6
10.5~16.6
Table 3. Modeling results of PLS with different pretreatment methods based on diffuse transmission data of apple samples using illuminations of upper and inclined upper
View tableView in ArticleTable 3. Modeling results of PLS with different pretreatment methods based on diffuse transmission data of apple samples using illuminations of upper and inclined upper
检测
方式预处理方法 Calibration Prediction RMSEC Rc RMSEP Rp 上部 Raw 0.288 2 0.960 6 0.343 6 0.934 9 SG-PLS 0.408 1 0.921 0 0.400 0 0.911 9 SG- Derivauive 0.245 4 0.971 4 0.432 7 0.896 8 SNV 0.264 9 0.966 7 0.303 7 0.949 2 MSC 0.264 4 0.966 9 0.301 5 0.949 9 斜上部 Raw 0.340 7 0.931 1 0.513 3 0.863 6 SG-PLS 0.474 9 0.866 1 0.579 3 0.826 1 SG- Derivative 0.295 8 0.948 1 0.633 1 0.792 4 SNV 0.317 7 0.940 1 0.451 7 0.894 3 MSC 0.322 9 0.938 1 0.454 6 0.893 0
Table 4. Modeling results of PCR with different pretreatment methods based on diffuse transmission data of apple samples using illuminations of upper and inclined upper
View tableView in ArticleTable 4. Modeling results of PCR with different pretreatment methods based on diffuse transmission data of apple samples using illuminations of upper and inclined upper
检测
方式预处理方法 Calibration Prediction RMSEC Rc RMSEP Rp 上部 Raw 0.576 3 0.842 4 0.601 4 0.800 7 SG 0.577 0 0.842 1 0.599 6 0.801 9 SG-Derivative 0.859 3 0.949 6 0.982 6 0.468 1 SNV 0.538 2 0.862 5 0.579 5 0.815 0 MSC 0.540 0 0.861 8 0.585 2 0.811 4 斜上部 Raw 0.709 2 0.701 4 0.797 4 0.670 7 SG 0.708 5 0.702 0 0.794 8 0.672 8 SG- Derivative 0.903 6 0.515 3 0.968 9 0.513 7 SNV 0.687 8 0.719 1 0.781 5 0.683 6 MSC 0.695 1 0.713 2 0.770 7 0.692 4
Table 5. Different model evaluation indexes of upper irradiation position
View tableView in ArticleTable 5. Different model evaluation indexes of upper irradiation position
建模
方式预处理方法 Calibration Prediction RMSEC Rc RMSEP Rp PLS Raw 0.288 2 0.960 6 0.343 6 0.934 9 SG-PLS 0.408 1 0.921 0 0.400 0 0.911 9 SG- Derivative 0.245 4 0.971 4 0.432 7 0.896 8 SNV 0.264 9 0.966 7 0.303 7 0.949 2 MSC 0.264 4 0.966 9 0.301 5 0.949 9 PCR Raw 0.576 3 0.842 4 0.601 4 0.800 7 SG-PLS 0.577 0 0.842 1 0.599 6 0.801 9 SG- Derivative 0.859 3 0.949 6 0.982 6 0.468 1 SNV 0.538 2 0.862 5 0.579 5 0.815 0 MSC 0.540 0 0.861 8 0.585 2 0.811 4
Tools
Get Citation
Copy Citation Text
Yan-de LIU, Hui-zhen CUI, Bin LI, Guan-tian WANG, Zhen XU, Mao-peng LI. Study on Optimization of Apple Sugar Degree and Illumination Position Based on Near-Infrared Technology[J]. Spectroscopy and Spectral Analysis, 2022, 42(11): 3373
Paper Information
Category: Research Articles
Received: Aug. 20, 2021
Accepted: --
Published Online: Nov. 23, 2022
The Author Email: LIU Yan-de (jxliuyd@163.com)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20