基于调制传递函数的激光反射层析成像质量评价方法  

Imaging Quality Evaluation Method of Laser Reflective Tomography Based on Modulation Transfer Function

作　　者：刘一凡 胡以华 张鑫源 王一程 韩飞 徐世龙 董骁 Liu Yifan;Hu Yihua;Zhang Xinyuan;Wang Yicheng;Han Fei;Xu Shilong;Dong Xiao(State Key Laboratory of Pulsed Power Laser Technology,College of Electronic Engineering,National University of Defense Technology,Hefei 230037,Anhui,China;Anhui Province Key Laboratory of Electronic Restriction,College of Electronic Engineering,National University of Defense Technology,Hefei 230037,Anhui,China)

机构地区：[1]国防科技大学电子对抗学院脉冲功率激光技术国家重点实验室,安徽合肥230037 [2]国防科技大学电子对抗学院电子制约技术安徽省重点实验室,安徽合肥230037

出　　处：《中国激光》2023年第6期140-146,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(61871389);国防科技大学科研计划项目重大项目(ZK18-01-02);湖南省研究生科研创新项目(CX20220007);脉冲功率激光技术国家重点实验室基金(SKL2020ZR09,KY21C604);电子对抗学院基金(KY21C220)。

摘　　要：激光反射层析成像技术作为实现空间目标远距离、高精度探测的有效途径之一,其成像质量的优劣对目标的探测精度有着很大的影响。将调制传递函数引入到激光反射层析成像质量评价中,通过求解激光反射层析成像系统的调制传递函数,得到变量为距离分辨率的调制传递函数曲线,在无需先验图像的情况下实现了对激光反射层析成像质量的定量评价,并搭建实验系统进行了验证。实验结果表明,基于调制传递函数曲线得到的距离分辨率与实验系统距离分辨率的理论计算值基本一致,该评价方法能够准确直观地描述激光反射层析成像质量。Objective With the continuous development of space technology,spaceborne long-distance high-precision detection technology has also made great progress.The imaging resolution is greatly limited because of the influence of the diffraction limit,effective aperture,and other factors of conventional optical imaging technology.Therefore,it is increasingly difficult to meet the needs of high-precision remote detection tasks.As one of the effective ways to realize long-distance and high-precision detection,laser reflective tomography technology has great advantages in the field of long-distance and high-precision detection because its imaging resolution is independent of distance and has high application value in the future.As an important part of the design of a laser reflective tomography system,imaging quality evaluation is of great significance to the application of laser reflective tomography technology.The conventional quality evaluation method of laser reflective tomography usually uses one or more specific values(such as relative root mean square error and image similarity coefficient)as the evaluation standard to realize the quantitative evaluation of the quality of laser reflective tomography.These methods often need a priori image as a reference,and there are large errors and limited scope of application.In this study,we invesitgate a quality evaluation method of laser reflective tomography.This method does not need an a priori image as a reference,and the result is more accurate.We expect that this method and our findings herein can aid the application of laser reflective tomography.Methods We introduce the concept of modulation transfer function into the quality evaluation method of laser reflective tomography and establish the quality evaluation model of laser reflective tomography based on distance resolution.First,the part containing edge information in the reconstructed image is intercepted,and its edge spread function is obtained.Next,the corresponding line spread function is obtained by differentiatin

关 键 词：遥感 反射层析成像 调制传递函数 成像质量 激光雷达 

分 类 号：O439[机械工程—光学工程]