散射成像研究现状及展望

Progress and Prospect of Scattering Imaging

散射介质广泛存在于自然界中,透过散射介质成像在医学、自动驾驶、国家安全等领域具有重要的科学意义和应用价值。简要综述了散射成像技术的发展,从弹道光和散射光的角度出发分析介质的散射特性,将现有散射成像技术分为利用散射光和分离散射光两大类,同时总结出散射介质空域特性分析和散射传输过程建模两种利用散射光的方法,并介绍了弹道光和散射光在空域或时域上存在的可分离性。从光照方式、成像装置复杂度、先验信息依赖度、适用散射介质类型及强弱和视场范围等方面分析比较了各类散射成像技术,并展望了其发展趋势。

Scattering media exist widely in our daily life.Imaging through the scattering media presents important scientific significance and large application value in medicine,autonomous driving,national security,and other fields.Here,we briefly review the current progress in scattering imaging and analyze the scattering characteristics of media via distinguishing the ballistic light and the scattered light.Existing scattering imaging techniques are divided into two categories:methods that utilize the scattered light and approaches that separate the scattered light from the ballistic light.Two groups of methods that exploit scattered light are summarized.They analyze the spatial characteristics of scattering media and model the light propagation in the scattering media,respectively.Also,the spatial or temporal separability between the scattered light and the ballistic light is introduced.The scattering imaging techniques are compared in terms of illumination,complexity of imaging devices,prior information dependency,type and strength of scattering media,and filed of view.Finally,the development trend is forecasted.