Evaluation of multiple mutual information for building damages afterearthquake using pre-event optical image and post-event SAR image
地面建筑物破坏状态检测的多类互信息量评估—震灾前光学图像与震灾后SAR图像的融合

Quick and accurate evaluation of the building damages after earthquake in urban area is a critical issue for timely assessingthe disaster situation and effectively carrying out rescue mission. Very High Resolution (VHR) optical image is usuallya direct way to visually monitor natural disaster occurrence. However, under some serious situations, such as bad weather or difficultgeographic conditions, the post-event VHR optical image is not always available over large areas. All day and all weatherspace-borne Synthetic Aperture Radar (SAR) in operation can provide the reliable and high quality images over a large area. Ofcourse, the relationship between optical image and SAR image is not simply a one-to-one visual correspondence. Microwavescattering and penetration through terrain media, and image speckles of SAR observation with a certain resolution are differentfrom VHR optical imaging. How to make fusion of VHR optical and SAR images under different pre-event and post-event situationscan provide a useful and operational approach to make timely and accurate evaluation of earthquake losses.