摘要
传统红外成像系统的激光成像过程受到外界多重干扰,所成图像中普遍存在高斯噪声,且噪声具有不定形性和低频性,严重影响图像质量。因此,研究激光干扰条件下红外系统运动目标衍射成像方法。首先分析激光在大气传输、红外光学系统以及探测器中的成像干扰特性,分别建立干扰模型;其次结合干扰特征,通过红外系统作用距离表达式,确定成像目标灰度值与距离之间的关系,利用像素与视角线的位置联系,获取运动物体的姿态特点;最后在物体表面温度、大气传输情况基础上设置运动目标衍射成像时的灰度值,根据平均法与外插法描绘运动目标,达到衍射成像目的。仿真实验表明,本方法受外界干扰较小,成像质量高。
The laser imaging process of the traditional infrared imaging system is interfered with by many external factors,and there is Gaussian noise in the image,and the noise has the characteristics of uncertainty and low frequency,which seriously affects the image quality.Therefore,this paper studies the diffraction imaging method of moving target in the infrared system under laser interference.Firstly,laser imaging interference characteristics in atmosphere transmission,infrared optical system and detector are analysed,and the interference models are established respectively.Secondly,the relationship between grey value and distance of imaging target is determined by the expression of infrared system action distance,and the pose characteristics of moving object are obtained by the position relation between image element and view line.Finally,the surface temperature of the object is calculated.On the basis of the degree and atmosphere transmission,the grey value of the moving object diffraction imaging is set,and the moving object is described according to the average method and the extrapolation method to achieve the purpose of diffraction imaging.The simulation results show that this paper’s method is less interfered with by the external environment and has high imaging quality.
作者
勒世清
李玥
陈德芳
LE Shiqing;LI Yue;CHEN Defang(Nanchang institute of science&technology,Nanchang 330108,China)
出处
《激光杂志》
CAS
北大核心
2021年第4期174-178,共5页
Laser Journal
基金
江西省教育局项目(No.2018014)。
关键词
激光干扰
红外系统
运动目标
衍射成像
干扰模型
laser jamming
infrared system
moving target
diffraction imaging
jamming model
