复杂背景下空中小目标动态红外成像仿真技术研究

Research on Dynamic Infrared Imaging Simulation of Small Aerial Target under Complex Background

空中小目标红外图像广泛应用于目标检测与识别和军事训练等领域,但这些数据获取成本极高,部分条件下的数据难以获得,因此,研究复杂背景下空中小目标红外图像仿真技术具有重要的研究意义。本文提出了复杂背景下空中微弱小目标动态红外成像仿真方法,并开发了相应的仿真软件。利用简化的三维目标模型模拟空中小目标,考虑大气传输效应,对目标自辐射和反射辐射进行建模。使用任意天空图像对背景初始化,通过相机透视模型调整可视区,并添加相机抖动模拟真实机载成像中的情况。利用泊松融合将仿真目标与仿真背景融合,并通过设置目标和相机的动力学模型,实现了任意数量飞行目标、飞行轨迹的动态仿真。为高效仿真不同背景、多种飞行条件下的空中小目标红外图像提供了一种思路。

Infrared images of small aerial targets are widely used in the fields of target detection and recognition and military training,but the cost of obtaining these data is extremely high,and the data under some conditions are difficult to obtain,so it is of great significance to study the infrared image simulation technology of small aerial targets in complex backgrounds.A simulation method and software are established for infrared imaging of aerial target under complex background.An aerial target is modelled as a simplified 3D structure.The infrared radiation model of the target is composed by spontaneous radiation model and reflection model.The sky background is initiated freely,with consideration of camera perspective model and platform vibration.Target and background are fused through a Poisson model.The dynamic simulation of the flight trajectory of any number of flight targets is realized by setting the dynamic model of the target and the camera,which provides a way to efficiently simulate the infrared images of small aerial targets under different backgrounds and various flight conditions.