多投影显示墙的全局颜色校正  

Global Color Correction for Multi-Projector Tiled Display Wall

作　　者：王修晖[1] 华炜[1] 鲍虎军[1] 

机构地区：[1]浙江大学CAD&CG国家重点实验室,杭州310058

出　　处：《计算机辅助设计与图形学学报》2007年第1期96-101,共6页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家重点基础研究发展规划项目(2002CB312102);国家自然科学基金(60021201).

摘　　要：画面校正是实现无缝多投影显示墙系统的关键环节,针对此,提出了一种基于参数估计和统计思想的全局颜色校正方法.首先根据采样点的粗略分布建立亮度响应曲线的经验参数模型,并通过采样数据来确定该曲线的参数;然后依据亮度响应曲线,引入统计算法来调整投影仪输入,从而实现视觉上无缝的多投影拼接显示.最后在2×2和3×5多投影显示墙上进行了该算法的可行性和效果测试.结果表明,该算法比现有颜色校正算法的画面质量更好,亮度更高.Color correction is a key step for implementing seamless tiled display wall, and a new algorithm based on parameter estimation and statistic is proposed in this work. The algorithm first selects a parametric curve to match the intensity transfer function （ITF） based on the sampling points, and estimates the parameter curve via some nonlinear optimization method. Then it uses statistic methods to adjust the input of each projector and achieves the visual-allowance seamless tiled display wall. In order to examine the feasibility and effectiveness, the proposed algorithm was implemented on a 2 × 2 and 3 ×5 tiled display wall. The test results show that our proposed algorithm can achieve better and brighter display effect than the existing algorithms.

关 键 词：多投影显示墙 颜色校正 亮度响应函数 参数估计 视觉无缝 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]