An analysis of earthquake damage information based on imaging mechanism of the high resolution SAR image

Abstract

High resolution SAR image is different from the previous low resolution SAR images in that the former is more seriously influenced by objective complexity and imaging factors such as noise,thus resulting in damage to target detection.The utilization of the high resolution SAR image therefore becomes more difficult.The traditional methods applicable to low resolution SAR image extraction are hence no longer suitable for high resolution SAR images.In order to accurately extract the damage information from high resolution SAR images,the authors,starting with the SAR imaging mechanism and backscatter characteristics,analyzed characteristics of earthquake damage to buildings,roads and bridges,and the results obtained provide the train of thought for target detection and the method for extraction.