基于资源三号影像和高分七号影像的DSM自动匹配效果研究与对比

Research and Comparison on the Automatic Matching Effect of DSM Based on ZY-3 and GF-7 Images

立体遥感影像为高分辨率、高精度数字表面模型(DSM)的自动提取提供了重要的数据来源。本研究利用资源三号遥感影像和高分七号遥感影像,采用测绘生产软件Inpho7.0进行自动匹配DSM,并对匹配结果进行对比分析。实验结果显示,采用Inpho7.0软件匹配的数据,在影像清晰的地方匹配效果较好,在影像质量不好、有阴影或者弱纹理区域的匹配效果较不理想。其中,在沟谷处资源三号与高分七号成果对比,资源三号的整体细节表达较少,晕渲较为光滑,存在粗差、地貌丢失等情况。但在青藏高原地区常年积雪区,资源三号遥感影像匹配效果优于高分七号。因此,在后续的研究生产中,可针对不同场景和地形地貌特点,选择合适的影像进行编辑处理。

Stereoscopic remote sensing images provide an important data source for the automatic extraction of high-resolution and high-accuracy digital surface models(DSM).This study utilized the ZY-3 remote sensing images and the GF-7 remote sensing images,and used the surveying and mapping production software Inpho7.0 for automatic matching of DSM.The matching results were compared and analyzed.The experimental results show that the data matched by Inpho7.0 software performs better in areas with good image sharpness,but less in areas with poor image quality,shadows,or weak textures.Among them,in the comparison of the results of ZY-3 and GF-7 in the valley,the overall details of ZY-3 are expressed less,the shading is relatively smooth,and there are situations such as coarse errors and loss of landform.However,in the perennial snow covered areas of the Qinghai Tibet Plateau,the matching effect of the remote sensing images of ZY-3 is better than that of GF-7.Therefore,in subsequent research and production,suitable images can be selected for editing and processing based on different scenes and terrain characteristics.