多投影仪自由立体显示的GPU几何及亮度校正技术  

GPU-Based Geometric and Photometric Corrections for Multi-projector Autostereoscopic Display

作　　者：周艳霞[1,2] 秦开怀[1] 罗建利[1] 

机构地区：[1]清华大学计算机系,北京100084 [2]石家庄陆军指挥学院军事运筹中心,石家庄050086

出　　处：《计算机辅助设计与图形学学报》2011年第4期561-570,共10页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家"八六三"高技术研究发展计划(2006AA01Z326)

摘　　要：由多个投影仪拼接显示的自由立体显示系统有很大的显示区域,能够产生更好的立体显示效果.针对可伸缩高分辨率多投影仪自由立体显示的系统特性和屏幕特性,通过分析各种几何校正和亮度校正算法,采用二次几何校正方法解决了自由立体显示中斜投影造成的部分特征点不在屏幕上的问题;提出了基于GPU的亮度自适应多模板校正方法,并通过GPU程序将几何校正和亮度校正合并为一个渲染过程,显著地提高了几何校正和亮度校正的速度.实验结果证明,采用文中方法能够有效地解决自由立体投影显示系统中的几何校正和亮度校正问题,且校正速度快、显示效果好.Tiled multi-projector autostereoscopic display systems can provide preferable 3D effects with larger display area. There are the location restrictions of the projectors and the special optical characteristics of the autostereoscopic display screens in scalable high-resolution multi-projector autostereoscopic systems. Thus it is infeasible to apply the traditional geometric and photometric corrections to tiled multi-projector autostereoscopie display systems. In this paper, the pre- transformation geometric calibration is proposed to solve the problem of the feature points out of the screen. Then the adaptive multiple-mask photometric correction is adopted to address the problem of the special optical characteristics of the autostereoscopie display screen. The geometric calibrations and photometric corrections are merged and implemented on GPU, which greatly facilitate the calibration procedure. The experimental results show that our approach can generate satisfying geometric and photometric corrections for the scalable high-resolution multi-projector autostereoscopic display.

关 键 词：组合显示 自由立体显示 亮度校正 几何校正 GPU 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]