基于多旋涡湍流模型的红外退化图像仿真  

Simulation of infrared degraded image based on multi-vortex turbulence model

作　　者：杨志钢 柳晴川 孙鹏[1,2] 郝燕云 张帆 吴根水[3,4] YANG Zhigang;LIU Qingchuan;SUN Peng;HAO Yanyun;ZHANG Fan;WU Genshui(Key Laboratory of Advanced Marine Communication and Information Technology,Ministry of Industry and Information Technology,Harbin Engineering University,Harbin 150001,China;College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China;China Airborne Missile Academy,Luoyang 471009,China;Aviation Key Laboratory of Science and Technology on Airborne Guided Weapons,Luoyang 471009,China)

机构地区：[1]哈尔滨工程大学先进船舶通信与信息技术工业和信息化部重点实验室,黑龙江哈尔滨150001 [2]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [3]中国空空导弹研究院,河南洛阳471009 [4]航空制导武器航空科技重点实验室,河南洛阳471009

出　　处：《应用科技》2023年第3期30-36,共7页Applied Science and Technology

基　　金：航空科学基金项目(201801P6002).

摘　　要：大气湍流效应会导致红外成像降质,为了有效模拟复杂湍流场引起的红外图像模糊现象,本文综合考虑湍流场中旋涡尺度、强度、数量和旋涡随机偏移等因素,提出一种基于改进类高斯点扩展函数的多旋涡湍流模型,对红外图像进行退化仿真;为了定量评估仿真图像的模糊程度,利用模糊图像中心像素向周围扩散的特点,提出基于相邻像素-锐度的图像降质模糊度评估方法。实验结果表明:所提出的退化模型具有图像质量变化平稳、模型参数细致、仿真可控性强等特点,并且所提出的评估方法能准确地反映图像的降质模糊度。Atmospheric turbulence can lead to degradation of infrared imaging.In order to effectively simulate the blurred infrared image caused by complex turbulences,a multi-vortex turbulence model based on the improved Gaussian-like point spread function is proposed to simulate the blur degree of infrared image,in which the scale,intensity,number and random offset of the multi-vortex are comprehensively taken into account.Furthermore,in order to quantitatively evaluate the blur degree of the simulated image,an image blur degree evaluation method based on adjacent pixels and sharpness is presented,which takes advantage of the blur characteristic of spreading from the center pixel to its surroundings.Experimental results show that the proposed degradation model has the characteristics of stable image quality change,detailed model parameters and strong simulation controllaility.What’s more,the blur degree of the simulated image can also be accurately estimated by the proposed evaluation method.

关 键 词：大气湍流 复杂湍流场 红外图像退化 图像仿真 点扩展函数 湍流模型 红外图像质量评价 相邻像素 

分 类 号：P427.1[天文地球—大气科学及气象学] TP391[自动化与计算机技术—计算机应用技术]