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首页> 外文期刊>Geoscience and Remote Sensing, IEEE Transactions on >Mutual-Information-Based Semi-Supervised Hyperspectral Band Selection With High Discrimination, High Information, and Low Redundancy
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Mutual-Information-Based Semi-Supervised Hyperspectral Band Selection With High Discrimination, High Information, and Low Redundancy

机译：高识别度，高信息量和低冗余度的基于互信息的半监督高光谱波段选择

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摘要

The large number of spectral bands in hyperspectral images provides abundant information to distinguish different land covers. However, these spectral bands have much redundancy and bring an extra computational burden. Thus, band selection is important for hyperspectral images. Since the labeled samples are difficult to obtain, a semi-supervised criterion based on maximum discrimination and information (MDI) is defined by using both limited labeled samples and sufficient unlabeled samples. This MDI criterion aims to select the most highly discriminative and informative bands, but it is hard to accurately calculate. Therefore, a novel criterion based on high discrimination, high information, and low redundancy (DIR) is proposed as its low-order approximation. Moreover, from an information theory perspective, a theoretical proof is given that many traditional semi-supervised feature selection criteria are the low-order approximations of this MDI criterion. Compared with them, the proposed criterion needs more relaxed approximation conditions. To search and optimize the proposed criterion, a novel clonal selection algorithm is proposed, where the adaptive clone and mutation operators are devised to speed up the convergence. Experimental results on hyperspectral images demonstrate the effectiveness of the proposed semi-supervised band selection method.
机译：高光谱图像中的大量光谱带为区分不同的土地覆盖提供了丰富的信息。但是，这些频谱带具有很多冗余并带来额外的计算负担。因此，波段选择对于高光谱图像很重要。由于难以获得标记的样本，因此通过使用有限的标记样本和足够的未标记样本来定义基于最大区分度和信息（MDI）的半监督标准。此MDI标准旨在选择具有最高判别力和信息量的频段，但很难准确计算。因此，提出了一种基于高区分度，高信息量和低冗余度（DIR）的新颖准则作为其低阶近似。此外，从信息论的角度出发，从理论上证明了许多传统的半监督特征选择准则是该MDI准则的低阶近似。与它们相比，所提出的准则需要更宽松的近似条件。为了搜索和优化提出的准则，提出了一种新颖的克隆选择算法，其中设计了自适应克隆和变异算子以加快收敛。在高光谱图像上的实验结果证明了所提出的半监督频带选择方法的有效性。

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