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主成份分析在蚀变信息提取中是一种最基本而又非常有效的图像处理方法，在图像处理实践中，因应用目的之不同而有各自的运用技巧。在金矿蚀变信息提取中运用了全波段主成份分析、选择主成份分析、直接主成份分析与植被掩膜等方法，并在图像处理中取得了较好的应用效果
The principal component analysis is one of the most basic and very effective image processing methods in the alteration information extraction. In the image processing practice, different techniques are applied depending on the purpose of the application. In the extraction of gold alteration information, the whole-band principal component analysis, principal component analysis, direct principal component analysis and vegetation mask are used in the extraction of alteration information of gold mine, and the better application effect is achieved in image processing