中文摘要：

红外成像系统非线性效应对红外图像的成像质量影响较大,也是制约目标识别精度的关键,如何实时高效地模拟成像系统非线性效应已成为当前三维红外视景仿真研究的热点和难点。提出了一种红外仿真场景成像系统非线性效应的动态添加方法,分析了渐晕、扭曲、噪声、离焦等典型非线性效应的计算过程,利用渲染到纹理（RTT）技术为仿真视口添加＂镜头＂,在Unity平台的基础上利用顶点和片段着色器将非线性效应在＂镜头＂上模拟,并与零视距红外仿真场景进行逐像素叠加运算,从而实现非线性效应的动态仿真。实验结果表明,该方法具有较高的真实感和可靠性,仿真开销较小,满足成像系统非线性效应的仿真需求。

英文摘要：

Nonlinear effect of infrared imaging system has a big influence on infrared imaging quality,and it is also the key of restricting target identification precision,how to simulate imaging system nonlinear effect in real-time and efficiently has become a hotspot and difficulty in 3D infrared scene simulation at present.A dynamic adding method of imaging system nonlinear effect in infrared simulation scenes was presented,and computational process of typical nonlinear effects were analyzed,such as vignetting effect,distortion effect,noise effect,out of focus,etc.＂lens＂were attached to simulation view by using the technology of render to texture（RTT）,then nonlinear effect was simulated in ＂lens＂ through vertex and fragment shader based on Unity platform,and overlaying calculation was conducted with zero stadia infrared simulation scenes,thus dynamic simulation of nonlinear effect was realized.The experiment results indicate that the method has high reality,reliability and lower simulation cost,and it can meet the demand of real-time simulation in imaging system nonlinear effect.