基于高光谱成像的苹果品种快速鉴别
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

陕西省农业科技创新与攻关项目(2015NY023)和农业部现代苹果产业技术体系项目(CARS-28)


Rapid Identification of Apple Varieties Based on Hyperspectral Imaging
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    以“乔纳金”苹果,“红富士”苹果和“秦冠”苹果共90个试验样本为试材分别采集865~1711nm的近红外波段高光谱图像,选取苹果图像感兴趣区域(ROI),以分辨率2.8nm提取其平均反射光谱数据,分别利用K近邻法(KNN)和径向基核函数支持向量机(RBF-SVM)进行品种判别,5折交叉检验。结果表明,3种苹果的近红外高光谱图像均在波长941~1602nm之间变得清晰,该区域200个波段下的平均反射光谱数据经KNN法中的10种距离算法评判,当K取值3和5时,切比雪夫距离、欧几里得距离和明可夫斯基距离3种距离算法的识别正确率均达到100%;SVM-RBF核函数模型中,γ取值为2-8~1的范围内识别正确率均在92%以上,当γ取值2-5,C取值为16和32时,识别正确率最高,为96.67%。故利用近红外高光谱图像技术结合KNN计算对苹果品种进行快速鉴别是优异和可靠的方案。

    Abstract:

    In order to achieve rapid non-destructive identification of apple varieties, the methodology of near-infrared hyperspectral imaging on identification of apple varieties was investigated. Near infrared hyperspectral images with wavelength from 865~1711nm of total 90 sample fruits were collected from three different varieties (“Jonagold”, “Fuji” and “Qinguan” apples), and hyperspectral image area of the apple was selected as a region of interest (ROI). Reflection intensity data of the average reflex spectrum were extracted with resolution rate of 2.8nm, then they were calculated with K-nearest neighbor (KNN) and the support vector machine (SVM) methods, respectively, which were checked with 5-fold cross-validation method. The results showed that the hyperspectral images of three varieties of apples all became clear within wavelength of 941~1602nm. Among ten distance-types’ judgment of KNN with average reflection intensity at 200 wavelength-points, the identification accuracy of Chebychev, Euclidean and Minkowski reached the highest of 100% when the parameter K was set at 3 or 5. While using the support vector machine-radial basis function (SVM-RBF) model, the accuracy rate reached above 92% when the value of γ fell within 2-8~1. The highest recognition rate of this model reached 96.67% when γ was set at 2-5 and C took the value of 16 amd 32 at the same time. The results demonstrated that near-infrared hyperspectral imaging in combination with KNN was excellent and reliable for the rapid identification of apple varieties. This method could provide reference for identifying apple varieties in production.

    参考文献
    相似文献
    引证文献
引用本文

马惠玲,王若琳,蔡骋,王栋.基于高光谱成像的苹果品种快速鉴别[J].农业机械学报,2017,48(4):305-312.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2016-08-12
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2017-04-10
  • 出版日期: