4.4 Article

Identification of Lycium barbarum varieties based on hyperspectral imaging technique and competitive adaptive reweighted sampling-whale optimization algorithm-support vector machine

Journal

JOURNAL OF FOOD PROCESS ENGINEERING
Volume 44, Issue 1, Pages -

Publisher

WILEY
DOI: 10.1111/jfpe.13603

Keywords

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Funding

  1. Priority Academic Program Development of Jiangsu Higher Education Institutions [PAPD-2018-87]
  2. National Natural Science Funds Projects [31971788]
  3. Postgraduate Research and Practice Innovation Program of Jiangsu Province [SJCX20_1405]
  4. Faculty of Agricultural Equipment of Jiangsu University [4121680001]
  5. Synergistic Innovation Center of Jiangsu Modern Agricultural Equipment and Technology [4091600030]

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A fast nondestructive detection method based on hyperspectral imaging technology was proposed to distinguish different varieties of Lycium barbarum. By preprocessing, extracting characteristic wavelengths using CARS, and utilizing SVM model, the classification effect was improved with high accuracy rates. Additionally, the introduction of the whale optimization algorithm further enhanced the classification accuracy.
In order to distinguish different varieties of Lycium barbarum effectively, a fast nondestructive detection method based on hyperspectral imaging technology was proposed. Six varieties of L. barbarum were selected as the research objects to obtain hyperspectral images. With the whole L. barbarum taken as the object, the region of interest was obtained by threshold segmentation, and the average spectra value of the image points of a single L. barbarum was extracted as the spectral data of the sample. Initially, standard normalized variate was used to preprocess the original spectral data. Furthermore, compared with other methods, competitive adaptive reweighted sampling (CARS) was chosen to extract the characteristic wavelengths. Additionally, the model of support vector machine (SVM) was set. The results showed that the SVM model based on CARS had the best classification effect. The training set accuracy was 100%, and the prediction set accuracy was 85%. Finally, in order to improve the classification accuracy, the whale optimization algorithm (WOA) was introduced. The accuracy of training set and prediction set obtained by WOA-SVM model were 89.44 and 88.33% respectively. Therefore, it was feasible to use hyperspectral imaging technology combined with CARS-WOA-SVM model to identify different varieties of L. barbarum.

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