光场相机中微透镜阵列与探测器配准误差分析

为了减少光场相机结构对光场图像数字对焦结果的影响,针对微透镜阵列为矩阵式排列的光场相机结构,定性分析了微透镜阵列与成像探测器之间的耦合距离误差、旋转角度误差和倾角误差这三个主要配准误差来源,分别提出了配准条件,并通过仿真实验加以验证。实验结果表明,当配准超出限制条件时,会导致对焦重构图像出现模糊、混叠等失真,缩小精确对焦的深度范围。

Registration Error Analysis for Microlens Array and Photosonser in Light Field Camera

In order to reduce the influence on the digital refocusing, the structure Registration Error in the light field camera is discussed. As for the camera in which the microlens array arranged in Matrix-style, the Registration Error sources are  analyzed. The most important registration errors including Coupled Distance Error, Rotation Error and Inclination Error are represented. And the Registration limit conditions for the three situations respectively are suggested. The simulation experiments show that when the registration limit is exceeded, the reconstructed image will appear blurred, aliasing and other distortion, and the accurate refocusing range will be reduced.