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卫星相机建模与仿真研究不论在民用还是军事领域都具有重要的理论研究和实际应用价值。根据TDI线扫相机的工作原理建立了一个TDI线扫相机光学通道的数学模型,该模型包括从景物到TDI CCD离散图像的几何投影关系和能量传递关系两部分,对于确定的成像系统,给定景物参数和光学系统参数,就可以确定对应图像传感器上的离散图像。为了验证模型,对一幅卫星图像进行了计算机仿真。建立的模型可以用来研究当成像条件改变时对图像的影响,进一步还可以用来发展虚拟卫星相机系统。
Satellite camera modeling and simulation studies have important theoretical and practical value both in civil and military fields. According to the working principle of TDI line scan camera, a mathematical model of optical channel of TDI line scan camera is established. The model includes the geometric projection relationship and energy transfer relationship from scene to TDI CCD discrete image. For a given imaging system, given Scene parameters and optical system parameters, you can determine the corresponding image sensor discrete images. In order to verify the model, a satellite image was computerized. The established model can be used to study the effect on the image when the imaging conditions change and further to develop the virtual satellite camera system.