Rapid Prediction for the Firmness of Guichang Kiwifruit by Hyperspectral Imaging

被引:0
|
作者
Shang J. [1 ,2 ]
Feng S. [1 ]
Tan T. [1 ]
Wu M. [1 ]
Chen H. [1 ]
Meng Q. [1 ,2 ]
机构
[1] Food and Pharmaceutical Engineering Institute, Guiyang University, Guiyang
[2] Research Center of Nondestructive Testing for Agricultural Products of Guizhou Province, Guiyang
关键词
chemometrics; firmness; Guichang kiwifruit; hyperspectral imaging; nondestructive detection;
D O I
10.13386/j.issn1002-0306.2022060168
中图分类号
学科分类号
摘要
The work aimed to improve the prediction efficiency in rapid determination of the firmness of kiwifruit. A Vis/NIR (390~1030 nm) hyperspectral imaging system was applied to obtain the images of Guichang kiwifruit, and the reflective spectrum in the regions of interest on each sample was acquired. Noise from original reflective spectrum was reduced by the standard normal variation method. The competitive adaptive reweighted sampling (CARS) and the successive projection algorithm were applied to select feature variables. Finally an error back propagation neural network and a multi linear regression (MLR) model were constructed to predict the firmness of kiwifruit. A total of 35 feature variables were selected by CARS from 256 variables. The working efficiency of the final prediction model was improved by 11-fold, with the runtime dropped from 5.84 s to 0.54 s. Overall, the CARS-MLR model showed a relatively good detection capability (rc =0.95, rp =0.92, RMSEC=1.65 kg/cm2, RMSEP=1.99 kg/cm2, RPD above 2). This study demon-strated the application potential of the nondestructive hyperspectral imaging technology for fast determination of the firmness of kiwifruit. © 2023, Editorial Department of Science and Technology of Food Science. All rights reserved.
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页码:345 / 350
页数:5
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