四维光场表达模型综述

Overview of 4D Light Field Representation

光场成像与处理是计算摄像学领域最具潜力的发展方向之一。在获得4D光场的基础上,构建简洁且高效的光场表达模型是光场理论的重要研究内容,也是光场技术迈向应用的关键。本文从4D光场的深度、纹理、几何、尺度和频谱等角度出发对光场表达模型进行解析,分别介绍子孔径图像、对极平面图、聚焦栈、超像素、多平面图像、超图、傅里叶切片、傅里叶视差层和对极聚焦谱等相关光场表达的特性,分析光场表达模型在光场重建、深度估计和光场编辑等不同应用场景的适用条件,归纳总结各种光场表达模型的优缺点及其潜在的应用方向。

Light field imaging and processing is one of the most potential directions in the field of computational photography.Constructing concise and efficient representations of light field is the theoretical basis and key to promote the applications of light field.Based on the depth,texture,geometry,scale,and spectrum of light field,this paper analyzes characteristics of typical light field representations,including sub-aperture image,epipolar plane image,focal stack,super-pixel,multiplane images,hypergraph,Fourier slice,Fourier disparity layer,and epipolar focus spectrum.This paper also summarizes the impacts of different representations for light field applications,such as reconstruction,depth estimation,editing and so on.Finally,the advantages,disadvantages,and potential applications of various representations are summarized.