多投影显示墙画面校正技术综述

Survey on screen calibration for multi-projector tiled display wall

由投影仪阵列组成的多投影显示墙是目前实现高性能、低成本大型绘制平台的首选解决方案。为了保证多投影显示墙画面的完整性,需要通过一定的方法来预补偿由于投影仪特性差异造成的画面几何扭曲与色彩不均衡。结合实际研究工作,从多投影显示墙存在的问题、几何变换矩阵求取、颜色模型估计和全局颜色校正等几个方面对多投影显示墙画面校正的研究情况进行综述,讨论了存在的问题和进一步的发展方向。

Multi-projector tiled display walls made of a set of projectors are the best choice for high performance and low cost large rendering system. In order to create perfect projection screen,it must make efforts to pre-compensate the output images＇ geometry distortion and color non-uniformity by the different characters of projectors. Based on their studies, the paper gave an overview of the research work done in the field of multi-projector tiled display wall,including existing problems, computation of geometry transform matrix, color model estimation and global color calibration. Finally,discussed existing problems, which need the further study and the further development of multi-projector tiled display wall.