分布式曲面投影系统几何校正算法的研究  

Research of geometrical calibration algorithm for distributed curved surface projection system

作　　者：张杨林[1] 杨红雨[1] 唐荣[1] 邓昌胜[1] 

机构地区：[1]四川大学计算机学院图形图象研究所,四川成都610064

出　　处：《微计算机信息》2009年第36期174-176,共3页Control & Automation

基　　金：基金申请人:杨红雨;项目名称:虚拟场景与真实场景的实时融合与交互技术;基金颁发部门:国家科技部;国家863计划资助(2007AA01Z328)

摘　　要：几何失真校正技术是虚拟现实投影系统中的关键技术之一。本文以CDZS柱面塔台模拟机为基础,提出一种在极坐标系中基于投影承接面几何特征的帧缓存纹理重映射技术来实现几何校正的方法,该方法采用角等分原则将二维纹理网格化后在三维坐标系中进行映射从而实现几何校正,并可以推广到投影面为球面、极坐标参数曲面等情况。试验结果表明该方法能够快速的完成几何畸变校正和通道间的无缝拼接融合,具有良好的实际应用价值。Calibration of geometrical distortion is one of the key technologies for virtual reality projection system.A new algorithm was proposed based on CDZS cylindrical tower simulator,which is based on geometrical characteristics of screens and buffer texture remapping in polar coordinates to correct geometrical distortion.By mapping an average angle-divided grid to the three-dimensional display surface,the algorithm can realize geometrical calibration for large-scale display systems with curved screens and oblique projectors.Experimental results indicate that the new solution could complete the geometric distortion correction and channel seamless integration quickly and is both effective and valuable in distributed curved surface projection system.

关 键 词：塔台模拟机 虚拟现实 几何校正 帧缓存 纹理映射 

分 类 号：TP319[自动化与计算机技术—计算机软件与理论]