高海拔冰川信息提取方法研究与应用

为获取大范围最佳冰川边界,本文以西昆龙冰川为研究对象,利用融合后的Landsat-8OLI数据,依据纹理和亮度等规则,使用面向对象-NDSI方法结合大津算法提取了多期单时相2015年冰川范围信息。最后,使用多时相冰川范围信息,进行迭代综合分析,得到了最佳的西昆龙冰川边界。该信息提取总体分类精度高达99%以上,证明面向对象-NDSI方法结合大津算法能够实现高海拔冰川全方位的信息提取。本实验将图像分割大津算法应用于冰川阈值信息获取,实现了客观、快速和准确的影像分割过程。

Research and Application of Information Extraction Method for Glaciers at High Altitude

In order to obtain the optimal glacier boundary of a large range,the West Kunlong glacier in this paper was taken as the re-search object.Using the fused Landsat-8 OLI data and according to the rules of texture and brightness,the object-oriented-NDSI method combined with the Otsu algorithm was used to extract the glacier range information of multi-phase and single-phase in 2015.Finally,the optimal West Kunlong glacier boundary is obtained by using multi-temporal glacier range information and iterative com-prehensive analysis.The overall classification accuracy of this information extraction is up to more than 99%,which proves that the ob-ject-oriented-NDSI method combined with the Otsu algorithm can achieve all-round information extraction of high-altitude glaciers.In this experiment,the Otsu image segmentation algorithm is applied to obtain the glacier threshold information,which achieves the objective,rapid and accurate image segmentation process.