Xi TIAN, Li-ping CHEN, Qing-yan WANG, Jiang-bo LI, Yi YANG, Shu-xiang FAN, Wen-qian HUANG. Optimization of Online Determination Model for Sugar in a Whole Apple Using Full Transmittance Spectrum[J]. Spectroscopy and Spectral Analysis, 2022, 42(6): 1907
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 6, 1907 (2022)
Fig. 1. Schematic of the on-line transmittance spectra measurement system
Fig. 2. Sugar prediction model based on different detection orientations
Fig. 3. The schematic diagram of different detection orientations
(a): Different orientations; (b): Spectral collection positions; (c): Raw multi-point transmittance spectra
(a): Different orientations; (b): Spectral collection positions; (c): Raw multi-point transmittance spectra
Fig. 4. Average spectral curves of a whole apple with three different detection orientations
Fig. 5. Spectral intensity changes at 920 nm for different detection orientations
Fig. 6. Dynamic curves of predictive model performance changing with spectral signal threshold in different detection orientations
Fig. 7. Dynamic curves of universal prediction model performance changing with spectral signal threshold in multiple orientations
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Table 1. The detection result of restricted model
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Table 2. The detection result of universal model
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