高山阴影区域数字表面模型匹配方法研究

Research on matching method of DSM in alpine shadow region

针对全球测图项目中高山阴影区域数字表面模型(DSM)匹配结果不理想的问题,本文测试CIPS和INPHO两款软件关键参数值的多种组合方案,以找出适用于高山阴影区DSM匹配的软件和参数组合方案,并对覆盖俄罗斯大高加索山脉约5000 km^(2)的区域开展生产试验,对结果进行定量和定性评价。试验结果表明,CIPS软件使用7×7滤波窗口和Shuttle Radar Topography Mission(SRTM)数据辅助匹配的组合方式,能有效减少高山阴影区域匹配结果的噪声、地形丢失等现象,合理表达高山阴影区地貌形态,优化DSM匹配流程,有效提高DSM的高程精度。

To address the unsatisfactory results of matching digitial surface model(DSM)in alpine shadow region in global mapping projects,this paper tests several combinations of key parameters in both CIPS and INPHO software,proposes a combination of software and parameters suitable for DSM data in shaded areas in alpine.By conducting production trials over an area approximately 5000 km^(2) in the Greater Caucasus Mountains of Russia and evaluating the results quantitatively and qualitatively.The experimental results show that the combination of using a 7×7 filter window in the CIPS software and Shuttle Radar Topography Mission(SRTM)assisting can effectively reduce the noise and topographic loss of the matching results in alpine shadow region,reasonably represent the shadow reigon,optimised the DSM matching process and effectively improve the vertical accaraly of DSM.