【摘要】 汶川地震灾区位于青藏高原东缘,该地区云雨天气较多,光学遥感受制约较大,而微波能够穿透云、雾、小雨等,且不受太阳光线的影响,雷达遥感具有全天时、全天候的特点,因而可以弥补光学遥感的不足。根据房屋受地震破坏后影响雷达回波强度,在雷达影像上表现为亮度及纹理不同的原理,本论文利用不同分辨率的COSMO-SkyMed和Radarsat等SAR数据,将其与震前的SPOT影像进行配准后,通过纹理分析等处理,对都江堰市区、北川县城曲山镇等受灾较为严重的城镇进行分析解译,利用雷达影像判读出倒塌房屋的信息,以及地震次生山地灾害对城镇的破坏。更多还原

【Abstract】 The disaster area of Wenchuan earthquake located in the eastern margin of Tibetan plateau,where cloud and rain were more common,so the optical remote sensing was restricted.The microwave remote sensing could work all time and all-weather for the microwave could penetrate through cloud,fog and light rain,and it also without limitation of night.The buildings which damaged by the earthquake would influence the echo intensity of microwave,which coursed the differences of brightness and texture in the images.The COSMO-SkyMed and Radarsat with different resolution were used in this study.They were geo-corrected with the SPOT images with 2.5 m resolution.By using the edge enhancement and texture analysis,the interpretation was done in the Dujianyan city and Qushan town.The information of damaged buildings was extracted,as well as the information of buildings damaged by the earthquake induced geo-hazards.更多还原