吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (4): 1266-1273.doi: 10.13229/j.cnki.jdxbgxb201504035

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大型正交多幕投影系统光辐射补偿算法

韩成1, 2, 张超1, 秦贵和2, 薛耀红1, 杨帆1, 范静涛1, 刘文静1   

  1. 1.长春理工大学 计算机科学与技术学院,长春 130022;
    2.吉林大学 计算机科学与技术学院,长春 130012
  • 收稿日期:2013-11-12 出版日期:2015-07-01 发布日期:2015-07-01
  • 作者简介:韩成(1978-),男,副教授,博士.研究方向:计算机仿真,计算机视觉和智能控制.E-mail:hancheng@cust.edu.cn
  • 基金资助:
    “十一五”国家科技支撑计划重点项目(2009BAE69B00)

An algorithm of optical radiometric compensation for projective system of large-scale orthogonal multi-screens

HAN Cheng1, 2, ZHANG Chao1, QIN Gui-he2, XUE Yao-hong1, YANG Fan1, FAN Jing-tao1, LIU Wen-jing1   

  1. 1.College of Computer Science and Technology, Changchun University of Science and Technology, Changchun 130022, China;
    2. College of Computer Science and Technology, Jilin University, Changchun 130012, China
  • Received:2013-11-12 Online:2015-07-01 Published:2015-07-01

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摘要： 为了消除CAVE系统中相邻投影幕间的光辐射影响,根据余弦辐射体发光强度的空间分布,建立了光辐射补偿模型,设计了基于GPU的光辐射并行补偿算法。以现有CAVE系统为例,通过分析可知,并行补偿算法可以通过多级补偿得到最佳的补偿效果;第一级补偿大约可以消除80%以上的光辐射影响;只有大约四分之一的图像受到严重影响;如果综合考虑多个投影图像间的多级补偿,那么在大型正交多幕投影系统上展示的视频需要进行预先的补偿处理。为此,根据对补偿结果的分析,提出了一种快速的光辐射补偿方法。在建立的大型正交多幕特种影院中,使用本方法得到了人眼辨别范围内的色彩流畅和颜色亮度均衡一致的图像。

关键词: 虚拟现实, 多投影系统, 图像处理, 光辐射补偿, 并行计算

Abstract: In order to eliminate the effects of optical radiation between adjacent projection screens in CAVE systems, an optical radiometric compensation model is established according to the spatial distribution of optical luminance of cosine radiator. Besides, an optical radiometric parallel compensation algorithm is designed based on GPU technology. By analysis of current CAVE systems, it can be concluded that parallel compensation algorithm can achieve the best compensation result through multi-level compensation. In the first compensation level, more than 80% of optical radiometric influence can be eliminated and only about a quarter of the image is severely affected. When the overall multi-level compensation among multi-projection images is considered, the video displayed on the projective system of large-scale orthogonal multi-screens must be pre-compensated. Therefore, a fast optical radiometric compensation method is proposed according to the analysis of compensation results. This method is applied in two special theaters of large-scale orthogonal multi-screens, and it is demonstrated that images with uniform color and brightness within the distinguishing range of human eyes can be achieved.

Key words: virtual reality, multi-projection system, image processing, optical radiation compensation, parallel computing

中图分类号: 

  • TP391.9
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