TDI线扫相机光学通道建模与仿真

Modeling and simulation of TDI line scan camera's optical pipeline

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。

Modeling and simulation of satellitic camera is significant both in popular using and military field. A model of TDI line scan camera＇s optical pipeline was established, which included two parts： the geometric perspective relationship and light energy transmission relationship from scenes to a discrete image on the TDI CAED sensor. To special imaging system, the parameters of scene and optical system were given. The discrete image was determined accordingly., In order to confirm the model given, the computer simulation based on a satellitic image was done. The model of optical pipeline presented is useful to research the influence of parameters and develop a virtual satellitic camera.