六通道球幕投影图像畸变校正及融合板设计  

Distortion correction of six-channel dome-screen projection image and design of fusion plate

作　　者：杨树财 于松 苏帅 王天娇 Yang Shucai;Yu Song;Su Shuai;Wang Tianjiao(Engineering Training Center,Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]哈尔滨理工大学工程训练中心

出　　处：《仪器仪表学报》2019年第9期170-179,共10页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51875144)项目资助

摘　　要：多通道球幕投影技术是一种重要的信息可视化技术,针对投影图像易发生图像畸变以及图像重合区域会产生亮带等问题,提出一种基于图像校正原理的图像融合处理方法。首先分析投影图像之间的几何位置关系,采用网格划分法对畸变图像进行校正,实现边缘图像的网格位置拼接对齐;然后采用边缘衰减算法来对图像进行边缘融合处理,并且设计出一种球幕投影融合用的遮光板装置,对多源投影的球幕中所产生的重叠光路进行过滤,消除多源投影中球幕图像上的亮带,使投影图像的整体亮度保持均匀,最后通过实验对投影图像的边缘融合效果进行分析,结果表明,实验选取的5组图像峰值信噪比平均值为33.550 dB,证明该方法具有较好的边缘融合效果。The multi-channel dome-screen projection is an important information visualization technology.Projection images are prone to image distortion and bright bands are generated in the coincident region of the image.To solve these problems,an image fusion processing method based on image correction principle is proposed.Firstly,the geometric position relationship among projection images is analyzed,and the distorted image is corrected by grid division method to realize the grid position splicing and alignment of edge images.Then,the edge attenuation algorithm is used to fuse images.The shading plate device for spherical screen projection fusion is designed,which filters the overlapping light paths generated in the dome-screen of multi-source projection.In this way,the bright bands on the dome-screen image in multi-source projection can be eliminated,and the overall brightness of the projection image uniform is reserved.Finally,the edge fusion effect of the projection image is analyzed by experiments.Results show that the average peak signal-to-noise ratio of five groups of images selected by the experiment is 33.550 dB,which prove that this method has a good edge fusion effectiveness.

关 键 词：球幕投影 图像融合 遮光板 峰值信噪比 灰度值 

分 类 号：TH74[机械工程—光学工程]