摘要
夜间灯光影像具有幅宽大,易于获取,背景干扰信息少,同时获取影像的极轨气象卫星DMSP每天可绕地球飞行14圈,提供4次全球覆盖图。基于这些与强震应急响应需求相一致的优势,以2011年3月11日东日本大地震为例,研究了利用两时相、多时相、全年灯光信息参与灯光变化的检测方法。研究结果,3种方法提取到了相似的震害区域且与实际震害地理位置相一致,两时相数据分析法具有最高精度。同时,分析了不同时相评估方法的优缺点和适用条件与范围,为后续地震灾害灾区评估,尤其是待救援主体人的空间分布提供了方法和技术基础。
large width night light images that has less background interference information are easy to get because polar orbit meteorological satellite DMSP is able flight around the earth 14 times per day which provides four times global images. Based on the response requirement of strong earthquake e- mergency,this paper take east Japan earthquake on March 11,2011 as an example to investigate lighting change detection method using two phase, multiple phrase, whole year lighting information. Research results indicate that three kinds of method extracted damage area is consistent with the ac- tual earthquake location, and two phase data analysis has highest accuracy. At the same time, it ana- lyzes the advantages and disadvantages of different phase estimation methods application condition and scope, which provides method and technology base for subsequent earthquake disaster assess- ment, especially spatial distribution of person who involve disaster environment.
出处
《江西科学》
2017年第4期553-557,568,共6页
Jiangxi Science
关键词
夜间灯光影像
地震灾害
灾区评估
变化检测
night light images
earthquake disaster
earthquake area assessment
change detection
