基于多时相卫星图像的稀土矿开发变化检测

利用研究区1999年ETM+和2005年SPOT图像对稀土矿区进行遥感变化检测。引入散点控制回归方法对图像进行辐射归一化处理,选用分类后对比检测法生成类别变化转移矩阵,确定了矿区面积增加的来源和新增矿区的分布范围,达到了预期效果。

THE DETECTION OF REE MINE EXPLOITATION SITE CHANGE BASED ON MULTI-TEMPORAL REMOTE SENSING IMAGES

To investigate the REE mine site exploitation in some places,the authors made remote sensing change detection by using Landsat ETM+(1999) and SPOT(2005) dataset.Based on the results of unsupervised classification,this paper used the "post-classification comparison" change detection technique to analyze the change details,and formulated an accurate "From-to" change matrix.The increased parts of mine sites class were detected,which resulted from the decrease of other classes.Then the distribution of the change parts was delineated on the map.Before change detection,a radiometric normalization method,i.e.,"Scattergram-Controlled Regression",was introduced to correct the spectral difference of the two temporal datasets.The accuracy assessment was also used to guarantee the acceptability of the classification results.All of these procedures could enhance the accuracy of the final results and lead to satisfactory result.