高分辨真三维显示中的体素化及均匀化方法  

The Voxelization and Homogenization methods of High-Resolution Volumetric 3D Display

作　　者：田丰[1] 夏雪[1] 田晶[1] 张文俊[1] 王鹤 

机构地区：[1]上海大学影视艺术技术学院影视工程系,上海200072 [2]通用电气医疗集团应用科学实验室,上海201203

出　　处：《计算机辅助设计与图形学学报》2013年第9期1304-1311,共8页Journal of Computer-Aided Design & Computer Graphics

基　　金：上海市教育委员会科研创新项目(12YZ008);上海大学创新基金(sdcx2012045)

摘　　要：为了使基于投影的真三维显示获得径向均匀亮度,并提高有效体素数量,提出一种体素化和均匀化方法.针对体素中轴亮度高和外围亮度低的问题,分析了现有体素采样方法导致体素数量损失过多的原因;然后以二维平面填充算法替代三维体素采样,提出基于径向范围填充的体素化方法,以及基于抖动技术的均匀化方法,以修正了柱空间内体素亮度失真.实验结果证明,文中方法保留了约60%的体显示分辨率,有效体素数量达到2亿个,真三维显示样机能够在室内光环境下显示清晰且均匀的全角度立体影像.In order to obtain radial uniform luminance and increase the effective numbers of voxels for volumetric 3D display based on projection, a voxelization and homogenization method is proposed. Regarding the problem of high luminance of voxels near central axis, the cause of excessive loss of voxels in the existing sampling methods is analyzed. By replacing three-dimensional sampling with two-dimensional plane-filling algorithm, the voxelization method in radial extent filling is proposed. Homogenization method based on dithering technique is proposed, which helps to correct voxel luminance distortion in cylindrical space. Demonstrated in the experiments, about 60% of the display resolution is retained and the effective voxel number reaches 200 million. The volumetric 3D display prototype is able to show clear and uniform stereo images with all viewing angles under the condition of indoor light.

关 键 词：真三维 柱空间 体素 径向范围填充 抖动技术 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]