基于ERDAS的掩模图像生成方法探讨

Discussion on the method of forming mask image based on ERDAS

同时存在多种地物干扰影响时,如何利用遥感软件ERDAS的可视化编程Modeler模块生成符合某种条件的二值掩模图像及多值掩模图像,在以往文献中很少有介绍,但这项技术的确是去除干扰信息及提取有用信息的关键一步。针对此问题,探讨了基于该模块生成二值和多值掩模图像的方法;将生成的多值掩模图像应用于卫星遥感图像处理,得到无干扰信息的遥感图像;并在此基础上用主成分分析法提取遥感铁染蚀变信息及羟基蚀变信息。结果表明:利用此方法生成的多值掩模图像应用于卫星遥感图像处理,可有效去除干扰信息,剔除假异常信息,为遥感蚀变信息提取提供高质量的基础数据。

The problem as to how to form binary or multi mask image by ERDAS＇ s Visualization Modeler according to the condition with muh- interference information has been seldom dealt with in previous papers; nevertheless, this problem is really the key to deleting the interference information and extracting the useful information. In this paper, the authors discussed the method for forming binary or multi mask image by ERDAS＇ s Visualization Modeler, extracted and analyzed the iron- stained and hydroxyl anomaly alteration information based on the multi mask image and principal component analysis technology. The results show that the interference information or the false information can be deleted and the useful information can be extracted from the remote sensing image by masking based on the multi mask image, and that the high quality basic data can be provided for the extraction of the alteration information from the remote sensing image.