利用QuickBird数据进行热红外遥感成像模拟的研究

针对基于机载热像仪图像或随机产生仿真场景的早期热红外成像模拟系统,提出了对高分辨率QuickBird图像进行星载热红外成像模拟的方法。基于高分辨率QuickBird图像,采用ISODATA法进行非监督分类,得到土地分类专题图,通过地物光谱数据库获得场景地物温度及发射率,从而可获得地面辐亮度图像;利用大气辐射传输软件MODTRAN对其进行大气修正,结合卫星遥感器辐射定标系数,最终可得到卫星遥感器输出图像。仿真结果表明,利用QuickBird进行热红外遥感成像模拟是一种全新而有益的尝试,对伪装效果检验等具有一定的参考价值。

Simulation of thermal infrared remote sensing imaging based on QuickBird data

Due to the situation of the early thermal infrared imaging simulation software based on airborne infrared imager images or randomly generated simulation scenes,a new method of space thermal infrared imaging simulation based on high reso- lution QuickBird satellite data is presented.The classification thematic map which is obtained by using ISODATA method of unsupervised classification based on high resolution QuickBird satellite data,is converted into a ground radiance image through scene temperature and emissivity based on a ground object spectral library.Through atmospheric correction that is carried out by the atmospheric transmission software MODTRAN and satellite remote sensor radiometric calibration coefficient,the satellite remote sensor output image is obtained from a ground radiance image.It is proved that thermal infrared imaging simulation based on QuickBird image is a new approach and is helpful for the relevant research works of the camouflage effect evaluation and so on.