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多因子线性变换是处理多波段遥感数据的数学方法 ,应用该方法对于图象主要特征的分离和提取具有很好的效果。但是 ,遥感图象数据中的岩性信息光谱分布复杂多样 ,在信息强度和分布方面较弱 ,使用现有的变换很难将岩性信息提取出来。为了完成遥感岩性填图的任务 ,本文提出利用目标向量空间线性变换的方法 ,简化所要提取的目标信息的光谱结构 ,提取目标信息。根据研究区内岩性目标地物的图象灰度光谱分布选择空间域坐标轴的位置 ,使需要分离的岩性信息只在一个轴上的投影不为 0 ,从而将岩性目标信息分离出来。该方法在新疆且末卡特里西地区提取铜矿带岩性取得了较好的结果。
Multi-factor linear transformation is a mathematical method to deal with multi-band remote sensing data. The application of this method has a good effect on the separation and extraction of the main features of the image. However, the spectral distribution of lithologic information in remote sensing image data is complex and diverse, and its information intensity and distribution are weak. It is difficult to extract lithology information using the existing transformation. In order to complete the task of remote sensing lithologic mapping, this paper proposes to use the linear transformation of the target vector space to simplify the spectral structure of the target information to be extracted and extract the target information. According to the grayscale spectral distribution of the lithologic target in the study area, the location of the coordinate of the spatial domain is selected so that the lithological target information needs to be separated only when the projection of the lithological information to be separated is not 0 on one axis . This method has achieved good results in the extraction of lithology from the copper belt in Qiamalitake, Xinjiang.