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Nondestructive detection of soluble solids content in apple by visible-near infrared spectroscopy |
MENG Qinglong1,2, SHANG Jing1,2, HUANG Renshuai1,2, CHEN Lutao1, ZHANG Yan2,* |
1(Food and Pharmaceutical Engineering Institute, Guiyang University, Guiyang 550005, China); 2(Research Center of Nondestructive Testing for Agricultural Products, Guiyang University, Guiyang 550005, China) |
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Abstract A model of predicting soluble solids content (SSC) of apple by visible-near infrared (Vis/NIR) spectroscopy was established and optimized. The hyperspectral images of 120 “Fuji” apples over 400-1 000 nm were obtained by hyperspectral imaging acquisition system. The effectiveness of the prediction model with pretreatment by second derivative, standard normal variation and multi-scatter calibration was compared and evaluated. Then the successive projection algorithm (SPA) and competitive adaptive reweighted sampling (CARS) methods were used to conduct data mining. Moreover, BP model and multiple linear regression(MLR) model were established based on characteristic spectra. The results showed that BP model with pretreatment by SD was superior to full spectra and other spectral pretreatments. And SPA-BP model based on characteristic spectra had an excellent prediction ability. The correlation coefficient rp and root mean square error of prediction (RMSEP) were 0.87 and 0.52, respectively. These results indicated that it's feasible to determine SSC of apples by Vis/NIR spectroscopy.
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Keywords
visible-near infrared spectroscopy
apple
soluble solids content
BP network
data mining
nondestructive detection
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Issue Date: 02 November 2020
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URL: |
http://sf1970.cnif.cn/EN/10.13995/j.cnki.11-1802/ts.023710 OR http://sf1970.cnif.cn/EN/Y2020/V46/I19/205 |
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