360度可环视全屏体三维显示系统  

360° Viewable Volumetric 3D Display System with Full Screen

作　　者：刘影[1,2] 潘文平[3] 张赵行[4] 刘永 陈兴华[6] 

机构地区：[1]南京航空航天大学机电学院,南京210016 [2]解放军理工大学工程兵工程学院,南京210007 [3]南京航空航天大学民航学院,南京210016 [4]中国科学院自动化研究所,北京100190 [5]大连市路灯管理处,辽宁大连116021 [6]上海飞机设计研究院,上海200436

出　　处：《光电工程》2011年第11期124-129,135,共7页Opto-Electronic Engineering

基　　金：国家863资助项目(2007AA01Z338);江苏省博士后科研资助基金(1101087C)

摘　　要：研究了一种全屏体三维显示系统。以数字微镜器件(DMD)作为空间光调制器(SLM),将三维模型的螺旋切片序列投射到高速旋转的螺旋屏上,由于视觉暂留效应,切片序列便被人眼感知为360度可环视的三维立体图像。重点分析了基于全屏的成像空间的性能,研究了基于增强型体心立方(EBCC)采样算法的体素化策略。实验结果表明,增强型BCC采样算法较基于笛卡尔栅格的采样算法减少了30%的体素量,同时避免了体素模型出现空洞;基于全屏的体三维空间超过原来半屏体三维显示系统的4倍,生成的图像亮度均匀;在400mm×300mm×250mm的长方体形成像空间内显示的立体图像,可从360°范围内任意视点裸眼观看。A volumetric display system with full helical screen is presented. When a series of helical slices of a 3D model is projected onto a rotating helical screen through a Digital Micro-mirror Device （DMD） as a fast Space Light Modulator （SLM）, due to the persistence of vision, human observers are able to perceive a 360°viewable 3D image by fusing together the successive helical slices into a 3D image. We analyze the performance of the 3D imaging space created by a rotating helical screen, and emphasize the volexlization approach based on Enhanced Body-center Cubic （EBCC） sampling algorithm. Experimental results demonstrate that, compared with the voxelization approach based on Cartesian lattice, voxel hole avoidance and a voxel reduction of more than 30% are both achieved through utilizing EBCC sampling algorithm, and the prototype is capable of generating images with consistent brightness in a imaging space three times bigger than our former system with half screen. In the cuboid imaging space with length 400 mm, width 300 mm and height of 250 mm, 3D images can be viewed from any viewpoint without any special eyewear.

关 键 词：体三维显示 数字微镜设备 视觉暂留 全屏体三维显示系统 

分 类 号：TN141[电子电信—物理电子学] TP391[自动化与计算机技术—计算机应用技术]