The Influence Of Haze Environment On Imaging Quality And Simulation Study

As the most commonly used information carrier in real life,high-quality images can help us better extract the information we need.However,the appearance of haze weather has caused great interference to the imaging of the target,resulting in the reduction of contrast,color distortion,and loss of details in the acquired images collected by the imaging equipment.In order to improve the image quality under haze weather,by studying the influence of haze weather on image quality and analyzing the changes in image quality under different haze concentration conditions,it can not only help to improve image quality,but also provide theoretical support for the simulation of military field tests under haze environment.Therefore,this thesis studies the effect of haze environment on image quality.The main contents are as follows:Firstly,the atmospheric scattering model based on Mie scattering theory is used in this thesis,and the difference between haze and fog in the scattering degree of visible light at different wavelengths is also considered.The process of image generation under haze environment is analyzed,and the atmospheric scattering model under haze environment is established.Then,the atmospheric scattering model is used to qualitatively analyze the imaging process in the haze environment.At the same time,using the semi-reference and no-reference image quality evaluation system,the multiple groups of real-time haze image features under different levels of pollution were extracted,and objective quantitative analysis was performed to obtain the influence of haze environment on image quality,and summarizes the visual characteristics of the image in the haze environment with the narrowing of the dynamic range of gray value,loss of high-frequency information,contrast reduction and color distortion.Then,starting from the existing calculation method of fog effect,this thesis uses the atmospheric scattering model under the haze environment to optimize the calculation method of the mixing factor in the method.That is,using the transmittance under the haze environment to achieve the calculation of the mixing factor,at the same time introducing the difference in visibility to reflect the change of the haze concentration,furthermore,a more physical simulation model of haze effect is established.Finally,this thesis uses a three-dimensional dynamic scene rendering simulation platform to construct the same visible light complex scene as the real shot image,and using the simulation model haze effect,based on the calculation method of a single pixel point,the simulation effect of haze weather under different visibility conditions is realized.At last,according to the visual characteristics of the haze images and the image quality evaluation system,the reliability of the haze effect simulation model is evaluated.