成像器高速相对运动模糊膨胀效应研究  

Research on the blur expansion effect of high-speed relative motion in imagers

作　　者：孙子林 王毅 李科[1] SUN Zi-lin;WANG Yi;LI Ke(Tianjin Jinhang Institute of Technical Physics,Tianjin 300300,China;The Third Military Representative Office of the Air Force in Tianjin,Tianjin 300300,China)

机构地区：[1]天津津航技术物理研究所,天津300300 [2]空军驻天津地区第三军代室,天津300300

出　　处：《激光与红外》2025年第3期414-419,共6页Laser & Infrared

摘　　要：针对红外成像器与探测目标发生高速相对运动(靠近或远离)时会造成图像模糊的问题,基于目标辐射特性和光学傅里叶分析,分析推导高速相对运动会造成图像像素之间信息混合带来的模糊效应原理,以全方向变速线性运动模糊为主,增添像素值的膨胀或收缩,依据传统红外成像系统的响应建模,对像素灰度值在曝光时间的变化和成像器速度建立非线性映射关系,建立成像器高速运动膨胀效应数学模型,并给出其点扩展函数,进而绘制调制函数(MTF)曲线。利用理论MTF设计滤波器,对测试红外方靶图像进行降质退化,实现红外图像膨胀效应模糊效果仿真,最后以海上行驶的轮船为例,模拟成像器在高速相对运动时对轮船的成像效果,基于清晰实际图像进行退化模糊,验证实际膨胀效应效果。To address the issue of image blur due to high-speed relative motion(approaching or moving away)between an infrared imager and a detected target,the principle of blurring caused by information mixing between image pixels as a result of high-speed relative motion is analyzed and derived on the basis of the target’s radiation characteristics and optical Fourier analysis.Firstly,with omnidirectional variable-speed linear motion blur as the main focus,the expansion or contraction of pixel values is added.Secondly,according to the response modeling of traditional infrared imaging systems,a nonlinear mapping relationship is established between the change in pixel grayscale values during exposure time and the imager speed.And A mathematical model of the high-speed motion expansion effect of the imager is developed and its point expansion function is given,which in turn plots the modulation function(MTF)curve.Further,using the theoretical MTF to design filters,the degradation of the test infrared square target image is performed to achieve the simulation of the blurring effect of the infrared image expansion effect.Finally,taking a ship driving on the sea as an example,the imaging effect of the imager during high-speed relative motion is simulated,and the degradation blurring is performed based on the clear actual images to verify the actual expansion effect.

关 键 词：运动模糊 红外成像 膨胀模糊 MTF 红外成像 

分 类 号：TN216[电子电信—物理电子学] TP391[自动化与计算机技术—计算机应用技术]