A class-oriented model for hyperspectral image classification through hierarchy-tree-based selection

Zhongqi Tang; Guangyuan Fu; XiaoLin Zhao; Jin Chen; Li Zhang

doi:10.1117/12.2234792

2 March 2016 A class-oriented model for hyperspectral image classification through hierarchy-tree-based selection

Zhongqi Tang, Guangyuan Fu, XiaoLin Zhao, Jin Chen, Li Zhang

Proceedings Volume 9901, 2nd ISPRS International Conference on Computer Vision in Remote Sensing (CVRS 2015); 990117 (2016) https://doi.org/10.1117/12.2234792
Event: 2015 ISPRS International Conference on Computer Vision in Remote Sensing, 2015, Xiamen, China

Abstract

With the development of hyperspectral sensors over the last few decades, hyperspectral images (HSIs) face new challenges in the field of data analysis. Due to those high-dimensional data, the most challenging issue is to select an effective yet minimal subset from a mass of bands. This paper proposes a class-oriented model to solve the task of classification by incorporating spectral prior of the target, since different targets have different characteristics in spectral correlation. This model operates feature selection after a partition of hyperspectral data into groups along the spectral dimension. In the process of spectral partition, we group the raw data into several subsets by a hierarchy tree structure. In each group, band selection is performed via a recursive support vector machine (R-SVM) learning, which reduces the computational cost as well as preserves the accuracy of classification. To ensure the robustness of the result, we also present a weight-voting strategy for result merging, in which the spectral independency and the classification effectivity are both considered. Extensive experiments show that our model achieves better performance than the existing methods in task-dependent classifications, such as target detection and identification.

Citation Download Citation

Zhongqi Tang, Guangyuan Fu, XiaoLin Zhao, Jin Chen, and Li Zhang "A class-oriented model for hyperspectral image classification through hierarchy-tree-based selection", Proc. SPIE 9901, 2nd ISPRS International Conference on Computer Vision in Remote Sensing (CVRS 2015), 990117 (2 March 2016); https://doi.org/10.1117/12.2234792

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KEYWORDS

Chromium

Hyperspectral imaging

Berkelium

Data modeling

Image classification

Electroluminescence

Target detection

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