DEM线状窗口邻域分析的月表撞击坑自动提取

Automatic Extraction of Lunar Craters Based on Neighborhood Analysis of Linear Window Using DEM

月表撞击坑是月球最直观、典型的地质构造单元,月表撞击坑的提取与分析对于揭示月球地质演化进程具有重要意义。本文基于撞击坑地形特征,利用美国月球勘测轨道飞行器(LRO)获取的100 m分辨率数字高程模型(DEM)数据,提出了一种线状窗口邻域分析的月表撞击坑自动提取方法。月海和月陆两个不同样区的试验结果表明:月海样区的最佳提取窗口为1×7和7×1,最佳提取阈值为4.5;月陆样区的最佳提取窗口为1×9和9×1,最佳提取阈值为6。对比目视识别结果,该方法对月表撞击坑的有效提取率达到78%;评价因子结果显示,该方法对撞击坑的提取精度达到77%以上,提取质量达到70%以上。

Craters of the moon is the most intuitive, typical geological units, so the extraction and analysis of lunar craters is of great significance to reveal the geological evolution process.This study designs neighborhood analysis of linear window for automatic extraction of lunar craters by using the 100 meters resolution DEM data derived from the Lunar reconnaissance orbiter （LRO） of America.The results of experiment by two different areas in lunar mare and lunar land show that the best extraction window of lunar mare is l×7 and 7×1, the best extraction threshold is 4.5. The best extraction window of lunar land is 1×9 and 9×1, the best extraction threshold is 6. This method can reach 78% on the extraction rate of the craters compared to results of visual recognition. The results of evaluation factors show that the extraction accuracy of this method is more than 77%. and the extraction quality is above 70%.