基于光线追踪的实时可交互计算生成集成成像方法  

Real-time Interactive Computer-generated Integral Imaging Method Based on Ray Tracing

作　　者：秦志强 张文阁 蒋晓瑜 闫兴鹏 严志强 QIN Zhi-qiang;ZHANG Wen-ge;JIANG Xiao-yu;YAN Xing-peng;YAN Zhi-qiang(Department of Information and Communication,Army Armoured Forces Academy,Beijing 100072,China)

机构地区：[1]陆军装甲兵学院信息通信系

出　　处：《光子学报》2019年第9期93-101,共9页Acta Photonica Sinica

基　　金：国家重点研发计划(No.2017YFB1104500);国家自然科学基金(No.61775240);全国优秀博士学位论文作者专项(No.201432)~~

摘　　要：为提高计算生成集成成像实时交互显示性能和灵活性,构建与集成成像再现系统结构一致的集成光场视见模型,通过该模型为单元图像阵列中每个像素生成一条逆向追踪的光线,使用光线追踪技术并行渲染光线为单元图像阵列像素着色.实验结果表明,顶点数为565880的点云模型、面数为977308的含纹理网格模型在透镜数为22×13、视点数为175×175的4K显示系统上显示帧率40fps以上,并实现了缩放、移动、旋转、显示微调等交互功能.该方法摆脱了虚拟相机模型,降低了算法复杂度,利于实现实时交互,能够应用于基于不同分布形式透镜阵列的集成成像显示系统.To improve the real-time interactive display performance and flexibility of the computer-generated integrated imaging,the integral light field viewing model consistent with the structure of the optical reconstruction system in integrated imaging is constructed.A reversely traced ray for each pixel in the elemental image array is generated by integral light field viewing model,the elemental image array is efficiently shaded as all the rays are computed parallely through ray tracing technology.Experimental results show that,a point cloud model with 565 880 vertex,and a mesh model containing textures with 977 308 faces are optically reconstructed on the 4 K display system at a frame rate of over 40 fps,the system have interactive functions such as scaling,moving,rotation and fine adjustment.Getting rid of the virtual camera model,the method make real-time interaction more effective and convenient,and can be applied to the integral imaging based on lens array with different distribution patterns.

关 键 词：集成成像 计算生成集成成像 单元图像阵列 集成光场渲染 光线追踪 光场 

分 类 号：TH741[机械工程—光学工程] O439[机械工程—仪器科学与技术]