小目标态势下旋翼飞机红外辐射特性表征及其反演方法
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摘要
目标红外辐射特性的研究对红外探测距离的预测和评估具有重要的意义。分析了基于红外图像的面目标红外辐射特性反演方法用于反演点目标特性时的局限和不足。通过对红外图像上点目标的提取,结合辐射基本理论,推导了目标辐射亮度、像元数和目标整体辐射强度之间的关系,提出了一种针对小目标态势下旋翼飞机的红外辐射特性反演算法,并利用该算法对某型旋翼飞机的红外辐射强度进行了反演计算,得到了不同观测角度下3~5μm波段红外辐射强度分布。结果表明,该方法可以实现远距离小目标红外辐射强度的反演,对于红外侦察系统的作用距离评估具有一定的意义。
The study of infrared radiation properties of military targets is important for the evaluation of IR detection range.The limitation and defect of the IR property inversion method based on infrared images when it is used to inverse the properties of point targets are analyzed.According to the principle of radiation measurement,the mathematical relationships among the radiance,pixel grey value and radiation intensity are deduced by extracting the point target in an IR image.A new algorithm for inversing the IR radiation properties of a helicopter in point target detection is proposed and is used to inverse the infrared radiation intensity of a certain military helicopter.The radiation intensity distribution of the helicopter at different observational angles in the waveband of 3 to 5μm is calculated.The results show that the algorithm can implement the inversion of IR radiation properties of small targets in far distance.It is of significance to the evaluation of infrared radiation detection range of IR reconnaissance systems.
The study of infrared radiation properties of military targets is important for the evaluation of IR detection range.The limitation and defect of the IR property inversion method based on infrared images when it is used to inverse the properties of point targets are analyzed.According to the principle of radiation measurement,the mathematical relationships among the radiance,pixel grey value and radiation intensity are deduced by extracting the point target in an IR image.A new algorithm for inversing the IR radiation properties of a helicopter in point target detection is proposed and is used to inverse the infrared radiation intensity of a certain military helicopter.The radiation intensity distribution of the helicopter at different observational angles in the waveband of 3 to 5μm is calculated.The results show that the algorithm can implement the inversion of IR radiation properties of small targets in far distance.It is of significance to the evaluation of infrared radiation detection range of IR reconnaissance systems.
引文
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[2]张敬贤,李玉丹,金伟其.微光与红外成像技术[M].北京:北京理工大学出版社,1995:251--258.
[3]牟达,王建立,陈涛.凝视型红外搜索跟踪系统对武装直升机作用距离的分析[J].兵工学报,2008,29(3):313--317.
[4]成声月,刘朝辉,邓智平,等.军用目标红外辐射特征研究进展[J].红外技术,2014,36(7):577--581.
[5]王东,赵威,邵铭,等.固定翼飞机地面红外辐射特性测量与分析[J].红外技术,2015,37(6):519--522.
[6]柴世杰,童中翔,李建勋,等.典型飞机红外辐射特性及探测仿真研究[J].火力与指挥控制,2014,39(8):26--33.
[7]王超哲,童中翔,李建勋,等.战斗机红外点源目标特性计算方法[J].红外技术,2012,34(11):666--671.
[8]赵永,姚连钰,李松维.直升机红外辐射的理论计算[J].飞机设计,2010,30(5):36--38.
[9]赵楠,李晓霞,马森,等.来袭飞机的红外辐射及其大气传输特性研究[J].激光与红外,2012,42(8):890--893.