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
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 11, 3373 (2022)
Fig. 1. Schematic diagram of the spectrum detection system
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
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Table 1. Statistical results of physical and chemical indices of apple
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Table 2. Ranges and average values of SSC in calibration set and prediction set
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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
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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
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Table 5. Different model evaluation indexes of upper irradiation position
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