基于高光谱与电子鼻融合的番石榴机械损伤识别方法
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现代农业产业技术体系建设专项资金资助项目(CARS-33-13)、广东省高等学校优秀青年教师培养计划资助项目(Y92014025)和广州市珠江科技新星专项资助项目(2014J2200070)


Identification for Guava Mechanical Damage Based on Combined Hyperspectrometer and Electronic Nose
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    摘要:

    提出了一种基于高光谱与电子鼻融合的水果机械损伤识别方法。分别采用高光谱仪与电子鼻对无损伤、轻度机械损伤和重度机械损伤的番石榴进行采样,提取特征信息后,运用主成分分析(PCA)、线性判别分析(LDA)、欧氏距离分析(ED)和模糊C均值聚类(FCM)对高光谱仪、电子鼻以及高光谱与电子鼻融合3种识别方法的识别效果进行了对比。PCA和LDA的分析结果表明,高光谱与电子鼻识别番石榴机械损伤是可行的,但单独采用这两种识别方法均无法对番石榴机械损伤程度进行分级。采用高光谱与电子鼻融合方法,结合LDA分析可以较好地识别番石榴机械损伤程度,比单一识别方法具有更好的识别效果。此外,LDA比PCA对番石榴机械损伤识别效果更佳。根据PCA、LDA和ED分析结果可以推测多源信息融合的分类识别方法既可获取更多的样本信息,提高相同样本之间的聚类性,又可较多地保持单一分类识别方法得到的不同样本之间的最大距离。根据FCM分析结果,高光谱识别、电子鼻识别和高光谱与电子鼻融合识别3种方法对番石榴机械损伤识别的正确率分别为89.74%、82.05%和97.44%,验证了多源信息融合方法对提高水果机械损伤识别效果的可行性。

    Abstract:

    This paper proposed a method to identify the mechanical damage of fruit based on the combined hyper-spectrometer and electronic nose. We used hyper-spectrometer and electronic nose on no damage guava, lightlevel mechanical damage guava and heavylevel mechanical damage guava samples, respectively. After extracting the feature information, the principal component analysis (PCA), linear discriminant analysis (LDA), Euclidean distance (ED) analysis and fuzzy Cmean cluster were used to compare the classification effect of three identification methods (hyperspectral identification, electronic nose identification, combined hyperspectrometer and electronic nose identification) for guava mechanical damage. The results of PCA and LDA show that the hyper-spectrometer and electronic nose can identify the mechanical damage of guava, but both of the single method cannot identify the mechanical damage level of guava. When using the method of combined hyper-spectrometer and electronic nose identification, LDA result shows that it can classify the mechanical damage level of guava effectively. The identification effect of LDA for guava mechanical damage was better than that of PCA. According to PCA, LDA and ED results, we can also infer that the multisource information fusion can not only gain more sample information which was useful for improving classification effect, but also keep the maximum distance of each group as large as possible. According to fuzzy C-mean cluster results, the identification accuracy of guava mechanical damage based on hyperspectral identification, electronic nose identification and combined hyper-spectrometer and electronic nose identification were 89.74%, 82.05% and 97.44%, respectively. This paper proved the feasibility of using multi-source information fusion to improve the identification effect of fruit mechanical damage.

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徐 赛,陆华忠,周志艳,吕恩利,姜焰鸣.基于高光谱与电子鼻融合的番石榴机械损伤识别方法[J].农业机械学报,2015,46(7):214-219.

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  • 收稿日期:2015-04-12
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  • 在线发布日期: 2015-07-10
  • 出版日期: 2015-07-10