Lytro相机的光场图像重聚焦方法  

Light field image refocus method for Lytro camera

作　　者：牛娜娜[1] 韩燮[1] 丁江华[1] 

机构地区：[1]中北大学计算机与控制工程学院,山西太原030051

出　　处：《计算机工程与设计》2016年第7期1847-1850,共4页Computer Engineering and Design

基　　金：国家自然科学基金项目(61379080);国家科技支撑计划基金项目(2013BAH45F02)

摘　　要：为实现光场相机的重聚焦性能,在傅里叶切片定理的基础上,提出一种重聚焦方法。对提取到的光场数据进行四维傅里叶变化,计算其傅里叶切片,对得到的傅里叶切片进行二维傅里叶逆变化提取重聚焦后的图像。实验结果表明了所提模型的正确性和重聚焦方法的可行性,验证了该算法具有较高的实现效率和适用性,其充分利用了光场的空间和方向信息,避免了空间域积分计算存在的时间复杂度。To implement refocus performance of light field camera,a refocus methods based on the Fourier slice theorem was put forward.Four dimensional Fourier change was used to process the light field data and the Fourier slice was calculated,for the result,two-dimensional Fourier inverse change was carried out to extract the refocus image.Experimental results verify the validity of the proposed model and the feasibility of refocus methods,which also has high efficiency and applicability,and makes full use of space and direction information of the light field,avoiding the time complexity of the spatial domain integral calculation.

关 键 词：光场 Lytro相机 重聚焦 微透镜阵列 三维重建 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]