4.7 Article

Rapid Detection of Pomelo Fruit Quality Using Near-Infrared Hyperspectral Imaging Combined With Chemometric Methods

出版社

FRONTIERS MEDIA SA
DOI: 10.3389/fbioe.2020.616943

关键词

near-infrared hyperspectral imaging (NIRHI); pomelo fruit quality; agricultural product; chemometric method; partial least squares (PLS); Gaussian radial basis function (RBF)

资金

  1. National Natural Science Foundations of China [61763008, 62003379]
  2. Natural Science Foundation of Guangxi Province [2018GXNSFAA050045]
  3. Guangzhou Science and Technology Program [202002030246]
  4. Guangxi Science and Technology Base Foundation [AD18281039]

向作者/读者索取更多资源

Advanced chemometric methods were investigated for the detection of pomelo fruit quality using near-infrared hyperspectral imaging (NIRHI) technology. The proposed RBF-PLS model was optimized for parameter scaling and showed good predictive accuracy for sugar, vitamin C, and organic acid content in pomelo samples. The combination of NIRHI technology and chemometric methods is applicable for rapid quantitative detection of pomelo fruit quality, with potential for detection in other agricultural products.
Pomelo is an important agricultural product in southern China. Near-infrared hyperspectral imaging (NIRHI) technology is applied to the rapid detection of pomelo fruit quality. Advanced chemometric methods have been investigated for the optimization of the NIRHI spectral calibration model. The partial least squares (PLS) method is improved for non-linear regression by combining it with the kernel Gaussian radial basis function (RBF). In this study, the core parameters of the PLS latent variables and the RBF kernel width were designed for grid search selection to observe the minimum prediction error and a relatively high correlation coefficient. A deep learning architecture was proposed for the parametric scaling optimization of the RBF-PLS modeling process for NIRHI data in the spectral dimension. The RBF-PLS models were established for the quantitative prediction of the sugar (SU), vitamin C (VC), and organic acid (OA) contents in pomelo samples. Experimental results showed that the proposed RBF-PLS method performed well in the parameter deep search progress for the prediction of the target contents. The predictive errors for model training were 1.076% for SU, 41.381 mg/kg for VC, and 1.136 g/kg for OA, which were under 15% of their reference chemical measurements. The corresponding model testing results were acceptably good. Therefore, the NIRHI technology combined with the study of chemometric methods is applicable for the rapid quantitative detection of pomelo fruit quality, and the proposed algorithmic framework may be promoted for the detection of other agricultural products.

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