多深度层场景光场渲染的无重影条件  

Ghost-free condition for light field rendering of multi-layer scenes

作　　者：董志华[1] 张之江[1] 曾丹[1] 

机构地区：[1]上海大学通信与信息工程学院,特种光纤与光接入网重点实验室,上海200072

出　　处：《光电子．激光》2010年第2期274-278,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60832003,60772124);上海大学研究生创新基金资助项目(SHUCX091022)

摘　　要：为避免光场渲染的结果因采样率不足而发生重影,提出了多深度层复杂场景的无重影光场渲染条件,证明了可由场景几何及摄像机角分辨率确定,不发生重影的最大摄像机间隔及最优深度,并在此基础上推导了两者间的关系。计算了不同摄像机间隔下的合成视图与标准视图间的峰值信噪比(PSNR),并以此衡量渲染质量。实验数据及人眼对重影发生与否的主观判定结论与本文的理论分析基本一致。The ghost-free condition is proposed to avoid the ghosting effect caused by the insufficient sampling rate when rendering the multi-layer scenes by the light-field method.It is shown that the optimal constant depth and the maximum camera interval can be determined by the scene geometry and the angular resolution of the camera.Also,a quantitative experiment is used to verify the presented condition.The peak signal-to-noise ratio（PSNR） between the rendered views and the standard views is calculated to show the rendering quality at different camera intervals.The experimental data are basically in accord with the subjective observation in this experiment and the results sufficiently support the theoretical analysis.

关 键 词：光场渲染 摄像机间隔 多深度层场景 重影现象 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]