【摘要】 与中低分辨率SAR图像相比,高分辨率SAR图像受目标复杂性和成像噪声等因素的干扰更为严重,致使应用高分辨率SAR图像检测震害目标变得更加困难。传统的适用于中低分辨率SAR图像的震害信息提取方法对于高分辨率SAR图像有一定的局限性。为了从高分辨率SAR图像中更加准确地提取震害信息,从SAR图像成像机理和目标的后向散射特征出发,对建筑物和道路、桥梁的震害特征进行了细致分析,为寻求合适的目标检测和提取方法提供了思路。更多还原

【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.更多还原