This paper put its emphasis on dimension reduction, the main research contents are as following: the characteristic of hyperspectral remote sensing image is researched.

本文重点研究了高光谱遥感图像的降维方法，研究的主要内容如下：研究了高光谱遥感图像的特性。

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Based on dimension reduction, it puts forward a new indexing structure to improve the performance of content-based retrieval of large image databases.

在降维的基础上，建立了一个新的索引机制，并以此加速大规模图像库的基于内容检索的进程。

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