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

Frontiers in Bioengineering and Biotechnology

Huazhou Chen¹  Quanxi Feng¹  Hanli Qiao¹  Qinyong Lin²  Ken Cai²  Lili Xu³ 

[1] Center for Data Analysis and Algorithm Technology, Guilin University of Technology, Guilin, China;College of Automation, Zhongkai University of Agriculture and Engineering, Guangzhou, China;College of Marine Sciences, Beibu Gulf University, Qinzhou, China;College of Science, Guilin University of Technology, Guilin, China;

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

DOI  :  10.3389/fbioe.2020.616943

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown