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中国精品科技期刊2020
赵昕,郑树亮,牛晓颖,等. 基于高光谱成像技术和近红外光谱技术的金冠苹果货架期判别及其品质分析[J]. 食品工业科技,xxxx,x(x):1−11. doi: 10.13386/j.issn1002-0306.2024080030.
引用本文: 赵昕,郑树亮,牛晓颖,等. 基于高光谱成像技术和近红外光谱技术的金冠苹果货架期判别及其品质分析[J]. 食品工业科技,xxxx,x(x):1−11. doi: 10.13386/j.issn1002-0306.2024080030.
ZHAO Xin, ZHENG Shuliang, NIU Xiaoying, et al. Shelf life identification and Quality Analysis of Golden Delicious apples Based on Hyperspectral Imaging and Near Infrared Spectroscopy[J]. Science and Technology of Food Industry, xxxx, x(x): 1−11. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2024080030.
Citation: ZHAO Xin, ZHENG Shuliang, NIU Xiaoying, et al. Shelf life identification and Quality Analysis of Golden Delicious apples Based on Hyperspectral Imaging and Near Infrared Spectroscopy[J]. Science and Technology of Food Industry, xxxx, x(x): 1−11. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2024080030.

基于高光谱成像技术和近红外光谱技术的金冠苹果货架期判别及其品质分析

Shelf life identification and Quality Analysis of Golden Delicious apples Based on Hyperspectral Imaging and Near Infrared Spectroscopy

  • 摘要: 为实现金冠苹果的货架期及可溶性固形物含量(SSC)和酸度(pH)的无损分析,利用高光谱成像系统(400~1000 nm)和近红外(800~2500 nm)光谱仪分别采集了金冠苹果的六个不同货架期(采后0、7、14、21、28和35 d)的光谱信息,采用了卷积平滑(Savitzky-Golay,SGS)、一阶导数平滑(Savitzky-Golay First Derivative,1D)、标准正态变换(Standard Normal Variate,SNV)和归一化(Area Normalize,Normalize)四种预处理方法,利用竞争性自适应重加权采样算法(Competitive Adaptive Reweighted Sampling Aglorithm,CARS)和无信息变量消除法(Uninformative Variable Elimination,UVE)提取特征波长,并建立了反向传播神经网络(Back Propagation Neural Network,BP)和最小二乘支持向量机(Least Squares-Support Vector Machine,LS-SVM)货架期分类模型。在对SSC和pH的预测中,采用灰度共生矩阵(Gray Level Cooccurrence Matrix,GLCM)提取金冠苹果高光谱图像中的8种纹理特征,采用CARS对预处理后的高光谱图像的光谱数据、高光谱图像的光谱与纹理融合数据以及近红外光谱数据提取特征变量,建立偏最小二乘(Partial Least Squares Regression,PLSR)和最小二乘支持向量机(LS-SVM)两种模型。结果表明,近红外光谱和高光谱成像技术均可实现对金冠苹果货架期的判别,判别最优模型为基于高光谱图像的1D+UVE+BP模型,判别准确率为100%;对金冠苹果SSC的定量预测中,基于近红外光谱的1D+CARS+PLSR模型预测效果最好,预测集相关系数(Rp)和均方根误差(Root Mean Square Error of Prediction Set,RMSEP)值分别为0.9323和0.4036;对金冠苹果的pH定量预测中,基于近红外光谱的SNV+CARS+LS-SVM模型预测效果最好,Rp和RMSEP值分别为0.8749和0.0417,研究结果为金冠苹果的无损检测提供了技术支持和依据。

     

    Abstract: In order to achieve non-destructive analysis of shelf life, soluble solid content (SSC) and pH of Golden Delicious apples, the spectral information of six different shelf life (postharvest 0, 7, 14, 21, 28 and 35 d) of apple was collected by hyperspectral imaging system (400~1000 nm) and near-infrared spectroscopy (800~2500 nm), respectively. The spectroscopy data was pro-processed by Savitzky-Golay (SGS), Savitzky-Golay First Derivative (1D), standard normal variate, SNV) and area normalize (Normalize), competitive adaptive reweighted sampling aglorithm (CARS) and uninformative variable elimination (UVE) were used to extract characteristic wavelengths, and the shelf-life classification models were established by back propagation neural network (BP) and least squares support vector machine (LS-SVM). In order to predict SSC and pH of apple, gray level cooccurrence matrix (GLCM) was used to extract 8 texture features from the hyperspectral images of apple. Feature variables were extracted from the spectral data of pre-processed hyperspectral images, spectral and texture fusion data of hyperspectral images, and near-infrared spectral data by CARS, and predictive models were established by PLSR and LS-SVM. The results showed that both NIR and hyperspectral imaging techniques could determine the shelf life of Golden Delicious apples. The optimal model was established by 1D+UVE+BP based on hyperspectral images, and the accuracy rate was 100%. The quantitative prediction models for SSC were established using a 1D+CARS+PLSR approach based on near-infrared spectroscopy, which demonstrated the most effective predictive performance. The correlation coefficient of the prediction set (Rp) and the root mean square error of prediction set (RMSEP) values were found to be 0.9323 and 0.4036, respectively. The SNV+CARS+LS-SVM model, utilizing near-infrared spectroscopy, demonstrated the most effective predictive performance, with Rp and RMSEP values of 0.8749 and 0.0417, respectively. The findings of this research offer valuable technical support and a foundational basis for the non-destructive testing of Golden Delicious apples.

     

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