快鸟数据在光学遥感器成像仿真中的应用

Application of High Resolution Quickbird Satellite Data in Imaging Simulation of Optical Remote Sensor

针对早期光学遥感成像模拟软件基于地面图像或机载航空图像的情况,提出针对高分辨率快鸟图像进行航天光学遥感器成像仿真的方法。基于高分辨率快鸟图像,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进行反射率转换,从而获得地面反射率图像;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,最终得到卫星遥感器输出图像。通过系统仿真结果表明,利用快鸟进行光学遥感器成像仿真为伪装效果检验提供一种有效的手段。

Due to the situation of the early optical remote sensing imaging simulation software based on ground images or airborne aviation images, a novel method of imaging simulation of spaceborne optical remote sensor based on high resolution Quickbird satellite data was proposed. Thematic maps on land classification, which was obtained by using ISODATA method of unsupervised classification based on high resolution Quickbird satellite data, were converted into ground reflectance images through reflectance conversion based on a ground object spectral library. Atmospheric correction was carried out by the atmospheric radiation transmission software package MODTRAN. With satellite remote sensor’s radiometric calibration coefficients, satellite remote sensor output images were generated from ground reflectance images. System simulation results show that optical remote sensing imaging simulation provides a valid method of camouflage effect test.