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基于雙邊濾波和空間鄰域信息的高光譜圖像分類方法
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國家自然科學(xué)基金項目(61275010、 61675051)、國家星火計劃項目(2014GA780056)和廣東交通職業(yè)技術(shù)學(xué)院校改重點科研課題(2017-1-001)


Hyperspectral Image Classification Method Combined with Bilateral Filtering and Pixel Neighborhood Information
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    摘要:

    提出了一種基于雙邊濾波和像元鄰域信息的高光譜圖像分類(BS-SVM)算法,。該方法首先利用雙邊濾波器提取經(jīng)主成分分析降維后的高光譜圖像空間紋理信息,,然后通過設(shè)計一種高光譜像元鄰域信息來構(gòu)建高光譜的空間相關(guān)信息,,最后將2種空間信息融合后與光譜信息結(jié)合,,形成空譜信息(空間信息和光譜信息)后交由支持向量機(jī)完成分類。實驗結(jié)果表明,,相比單純使用光譜信息的支持向量機(jī)的分類方法以及基于Gabor濾波的空譜信息結(jié)合分類方法,,所提出的BS-SVM方法分類精度有較大幅度提高,充分證明了該方法的有效性,。

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    Supplementing spectral information with spatial information to improve the classification of hyperspectral image is becoming a hot research in recent years. An improved scheme was put forward according to existing methods. An algorithm of supervised classification was proposed which was combined with bilateral filter and pixel neighborhood information (BS-SVM). Firstly, the spatial texture information of hyperspectral image was extracted whose dimensionality was reduced by PCA. Secondly, spatial correlation information was formed by building pixel neighborhood information of hyperspectral image. Finally, spatial-spectral information was merged by the two kinds of spatial information and the spectral information, which was classified by SVM. The BS-SVM classification method was implemented on the hyperspectral data of Indian Pines and Pavia. The results indicated that in the first place, the OA (Overall accuracy) of G-SVM for Indian Pines and Pavia were 3%~4% and 2%~3% higher than those of SVM, the same index for B-SVM were 3%~4% higher than that of G-SVM, and the classification performance can be improved effectively by the spatial texture information of hyperspectral image extracted by bilateral filter. Furthermore, the salt and pepper can be removed effectively by BS-SVM, showing very good performance in hyperspectral classification. In the second place, the classification of some methods for Pavia was better than the Indian. The reason was that the types and distribution of grounds for Indian were more complicated than Pavia. The classification for the less ground were bad, especially the Oats (only 20) was the worst. Therefore, it directly led to the AA (Average accuracy) generally lower than OA. However, the standard deviation of the classification for BS-SVM was much smaller than those of other methods, and the effectiveness of the method was verified with good stability. The experiments showed that the BS-SVM algorithm was better than original SVM with the pure spectrum information, the spatial-spectral information-based methods with Gabor. With the spatial correlation information extracted by the bilateral filter and the pixels neighborhood information, the performance of the classification with BS-SVM algorithm was greatly improved, and the effectiveness of BS-SVM was fully verified in the classification of hyperspectral image.The method can be applied to the field of crop growing, accurate classification and identification.

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廖建尚,王立國,郝思媛.基于雙邊濾波和空間鄰域信息的高光譜圖像分類方法[J].農(nóng)業(yè)機(jī)械學(xué)報,2017,48(8):140-146,,211. LIAO Jianshang, WANG Liguo, HAO Siyuan. Hyperspectral Image Classification Method Combined with Bilateral Filtering and Pixel Neighborhood Information[J]. Transactions of the Chinese Society for Agricultural Machinery,2017,48(8):140-146,211.

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  • 收稿日期:2016-12-18
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  • 在線發(fā)布日期: 2017-08-10
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