利用时空内插及数据正规化辅助方法监测地震前热异常

应用卫星热红外遥感图像提取震前温度变化信息,会碰到云干扰以及信息提取方法的科学性等课题.为了减少云干扰,本研究使用时空内插法来填补或复原受云影响的网格温度; 为了客观监测及记录增温现象,研究设定正规化标准值与阀值,使计算机半自动监测相对高温区,并利用不同时期图像云影移动及影像镶嵌技术,还原被云遮蔽的增温区,以期能科学反映地热异常现象,利于后续震前增温异常前兆研究的进行.

THE APPLICATION OF SPATIAL-TEMPORAL INTERPOLATION AND DATA NORMALIZATION METHODS TO DETECTING THE PRE-EARTHQUAKE ABNORMAL TEMPERATURE INCREASING PHENOMENON

The application of satellite-sensed thermal infrared imagery to the detection of changes in temperature before outbreaks of earthquake is faced with two problems: the interference with image by clouds and the scientific record of temperature-increase phenomena.This study has solved the problems through using spatial-temporal interpolation to make inference for zones with information on abnormal temperature increases negatively affected by clouds as well as mosaic of temperature-increase images sensed at different time points so as to recover images free of clouds.In addition to the methods for eliminating the interference by clouds,this study specifies normalized standard values and threshold numbers so as to use computerized semi-automatic detection to identify zones with relatively high temperatures,a scientific approach to facilitating automatic coloring of such zones and mosaic of images.The methods for processing images,deleting negative influence of clouds and scientifically detecting pre-earthquake abnormal increases in temperature as described in this paper are intended to serve as reference for other researchers to improve precision in subsequent studies.