为了增加红外凝视焦平面阵列系统成像仿真的置信度, 对系统中的成像几何扭曲效应进行了产生机理分析, 从二维图像像素角度出发, 在空域通过寻求各阵列元对应像素点的径向畸变量建立成像扭曲模型, 并利用反演解析的方法对畸变图像中的像素灰度值进行估算, 实验仿真结果表明, 几何扭曲效应的存在严重影响了系统的成像效果, 几何扭曲效应的建模仿真对后续的系统性能评估和算法研究至关重要。

To increase the fidelity of imaging simulation of infrared staring focal plane array system, the mechanism of geometric distortion effects was analysed.From the point of two-dimensional image pixel, the model of geometric distortion was built by seeking the radial distortion of pixel corresponding to each array element in the space.The image pixel gray value of distortion image was estimated by the inversion of the analytical method.The simulation results show that, geometric distortion seriously affects the imaging results of the system.Modeling and simulation of the geometric distortion effects are essential for the follow-up system performance assessment and algorithms research.