| 本文已被：浏览 5821次 下载 7408次 |
码上扫一扫！ |
|
|
| 面向多投影显示墙的画面校正技术 |
|
王修晖1,2, 华炜2, 林海2, 鲍虎军2
|
|
1.中国计量学院,信息工程学院,浙江,杭州,310018;2.浙江大学,CAD&CG国家重点实验室,浙江,杭州,310058
|
|
| 摘要: |
| 多投影显示墙是缓解对超高分辨率显示屏幕不断增长的需求与单台显示设备分辨率有限性之间矛盾的有效手段,但目前还缺乏规范化的模式和方法以支持高精度、高可靠性的画面校正.提出一种颜色校正方案以解决上述问题.首先介绍多投影显示墙画面校正中存在的主要问题和现有的解决方法;在此基础上,给出了多投影显示墙的画面校正流程和几何校正方法;然后讨论了多投影显示墙画面校正结果的评价标准,提出了投影仪的广义颜色模型和基于搜索技术的视觉无缝方法.该方案使用数码相机实现了高精度的视觉无缝画面校正,从而提高了构造多投影显示墙的效率并降低了维护成本.校正结果在多种类型的投影墙系统中得到验证和应用,对指导多投影显示墙的搭建和维护具有较高的理论与实践价值. |
| 关键词: 多投影显示墙 画面校正 广义颜色模型 视觉无缝 遗传算法 模拟退火 |
| DOI： |
| 分类号: |
| 基金项目:Supported by the National Basic Research Program of China under Grant No.2002CB312100 (国家重点基础研究发展计划(973)); the National High-Tech Research and Development Plan of China under Grant No.2006AA01Z325 (国家高技术研究发展计划(863)) |
|
| Screen Calibration Techniques for Multi-Projector Tiled Display Wall |
|
WANG Xiu-Hui,HUA Wei,LIN Hai,BAO Hu-Jun
|
| Abstract: |
| Multi-Projector tiled display wall is thought to be an effective technique to tackle the conflict between the increasing demands for super-resolution display and the resolution limitations of a single display equipment,but currently there lack of normal forms and normalized methods to support screen calibration with a high precision and high reliability.This paper tries to solve this problem with a new color calibration scheme.The main problems in screen calibration and the existing solutions are introduced first.Then the screen calibration process and geometry calibration methods are listed.After that,evaluation criterions for screen calibration are discussed,and a generalized color model for projectors color calibration and a visual seamlessness algorithm are presented in detail. Only employing a digital camera,the new scheme can build tiled display walls with high-precision visual seamlessness,which results in higher construction efficiency and lower maintenance cost.The methods have been verified and applied in a variety of tiled display wall,and have shown great theoretical and practical significance for building and maintain tiled display walls. |
| Key words: multi-projector tiled display wall screen calibration generalized color model visual seamlessness genetic algorithm simulated annealing |
