光学影像匹配技术在地表形变监测中的应用研究

Application Research of Optical Image Matching Technology in Surface Deformation Monitoring

近年来,随着光学遥感影像在正射校正、配准和相位相关技术方面研究的不断推进和发展,应用光学影像进行高可信度地提取地震形变场成为可能。本文采用光学影像匹配技术,通过处理震前震后两景SPOT5卫星影像数据,对玉树地震的同震位移进行研究,准确得到了30多千米的地表破裂带以及附近的同震水平位移分布。此结果与野外调查比较一致,表明了光学影像匹配技术在提取地震形变场中具有巨大的应用潜力。

In recent years,with the development of optical remote sensing image in ortho-correction,registration and phase correlation technology,it is possible to extract seismic deformation field with high feasibility using optical image. In this paper,we get the co-seismic displacement of Yushu earthquake by processing two SPOT5 satellite images based on optical image matching technology. The surface rupture zone of more than 30 kilometers and the distribution of co-seismic horizontal displacement near it are accurately obtained. The results are in good agreement with field investigation,which indicates that optical image matching technology has great potential in extracting seismic deformation field.