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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。
In view of the situation that the early optical remote sensing imaging simulation software is based on the ground image or the airborne aerial image, a method of imaging the space optical remote sensor for high resolution fast bird image is proposed. Based on the high-resolution fast bird image, the ISODATA method was used for unsupervised classification, and the land classification map was obtained. The reflectivity was converted by the terrestrial spectral database to obtain the terrestrial reflectivity image. Atmospheric correction was carried out by atmospheric radiative transfer software MODTRAN , Combined with satellite remote sensor radiation calibration coefficient, the final satellite remote sensor output image. The simulation results show that the use of fast birds for optical remote sensing imaging simulation camouflage effect test provides an effective means.