Research and Comparison on the Automatic Matching Effect of DSM Based on ZY-3 and GF-7 Images
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 com-pared and analyzed. The experimental results show that the data matched by Inpho7.0 software performs better in areas with good im-age 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 situa-tions such as coarse errors and loss of landform. However,in the perennial snow covered areas of the Qinghai Tibet Plateau,the matc-hing effect of the remote sensing images of ZY-3 is better than that of GF-7. Therefore,in subsequent research and production,suit-able images can be selected for editing and processing based on different scenes and terrain characteristics.
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