基于影像模拟的多山地区SAR影像正射校正

Ortho-Rectification of Mountain Region SAR Image Based on Image Simulation

针对贵州多山地区SAR影像出现的几何畸变现象,基于DEM生成模拟SAR影像,并在此基础上创建与DEM地理坐标相一致的前向查找表,与模拟SAR影像坐标相一致的后向查找表,即建立DEM与模拟SAR影像的映射关系,经真实SAR与模拟SAR的配准,实现DEM与真实SAR的关联,再赋予正确的像素值,最终消除畸变现象。经实验表明,该方法有效地校正多山地区SAR影像的几何畸变。

For the geometric distortion phenomenon of Guizhou mountainous area of SAR image, based on DEM Simulate SAR image, and on this basis to create consistent with DEM geographic coordinates before to lookup table, and simulation of SAR image coordinates coincide to a lookup table based on, namely, the establishment of the DEM and simulated SAR image mapping, after the registration of SAR simulation and real SAR, DEM and real SAR Association, and then gives the correct pixel values, and finally eliminates the distortion phenomenon.The experiments show that this method effectively, the geometric distortion correction of mountainous regions of SAR image.