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Lytro相机的光场图像校正与重对焦方法

DOI: 10.11834/jig.20140703

Keywords: 光场相机,Lytro相机,重对焦,分数阶傅里叶变换

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Abstract:

目的光场相机因其具有先拍照后对焦的能力而备受广泛关注,然而光场相机的理论研究往往受制于原始光场图像及其标定参数的获取。基于目前市面上唯一的一款消费级光场相机――Lytro相机,提出一套光场图像获取、校正和重对焦的系统化方法。方法通过分析Lytro相机工作原理、算法和文件结构,给出了一套实现原始光场数据提取、解码、颜色校正、微透镜阵列标定和校正的完整方案。并在此基础上提出一种基于分数阶傅里叶变换的Lytro相机重对焦方法。结果实验结果表明所提系统级方案正确,所提重对焦方法具有令人满意的重对焦性能。结论本文Lytro相机光场图像获取和标定方法,利用分数阶傅里叶变换实现光场图像的频率域重聚焦。基于两台Lytro相机的实验结果表明,本文方法可正确获取图像数据及相机参数,重聚焦算法效果好。

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