Multi-aperture Underwater Imaging Technology Based On Polarization Information

Underwater optical imaging technology is widely used in marine safety and ecological monitoring and environmental protection,marine energy exploration,marine military reconnaissance and other fields.Due to the absorption and scattering of light waves by water,the underwater imaging results present some image problems,such as contrast reduction,brightness reduction,blur and so on,It has certain theoretical research and application value to carry out the research on underwater imaging technology of porous diameter based on polarization information.In this paper,based on the underwater environment of non-uniform light field,polarization imaging technology has poor estimation effect on the spatial distribution of water backscattering parameters,and the constant method and fitting method have shortcomings.Aiming at this problem,a multi aperture underwater imaging technology integrating polarization information is proposed,and a virtual large aperture imaging system is realized by using camera array to obtain the wide-angle light field information,Then the depth information of the scene is fused to realize the accurate estimation of background scattering and degree of polarization,and the estimated parameters can better reflect the global characteristics of the scene.Through imaging experiments of different polarizations targets in turbid underwater environment,the results show that this method can effectively overcome the problems caused by underwater non-uniform light field and obtain high-quality restoration results.In translucent underwater environment,there are a large number of suspended particles,which have strong absorption and scattering effects.Due to the limited field of view of traditional imaging system,the information obtained by traditional imaging system is limited,which leads to the underestimation of water backscatter related parameters,and the influence of target material and water characteristics,the imaging application of traditional active polarization imaging technology is limited,A multi aperture polarization focusing imaging method based on polarization angle information using non polarized light illumination is proposed.The multi aperture imaging system is used to expand the detection field of vision,obtain more effective information in translucent environment,fuse the polarization angle information of each sub aperture,optimize the estimation of backscattering related parameters,and remove the interference of scattered light more effectively,At the same time,log filter is used to enhance the image object,and finally the underwater image with enhanced details and contrast is obtained.