Information Fusion of Optical Image and SAR Image Based on DEM

Abstract

Because the optical images obtained in geological hazard monitoring area can't display the Gaussian coordinates visually and the Synthetic Aperture Radar (SAR) images aren't easy to be identified. The Digital Elevation Model (DEM) data and Global Navigation Satellite System (GNSS) monitoring data are applied in this paper. Firstly, interpolation is used in SAR image, and the missing height Gaussian coordinates are obtained by matching with DEM data. Secondly, the cross-range and height Gaussian coordinates of each target point on the optical image are obtained by applying the pixel scale, and the range Gaussian coordinates are got by matching with DEM data. Finally, the fusion information is obtained by matching the SAR image with the optical image. The experimental results show that this method has certain feasibility. It proves that the method can provide simple and effective help for landslide hazard monitoring.