虚拟空间动态几何畸变量化方法  

Quantitative Model for Dynamic Spatial Distortion in Virtual Environments

作　　者：彭子雄 夏振平[1,2] 张跃渊 李超超 张元申 Peng Zixiong;Xia Zhenping;Zhang Yueyuan;Li Chaochao;Zhang Yuanshen(College of Electronics and Information Engineering,Suzhou University of Science and Technology,Suzhou 215009,Jiangsu,China;College of Physical Science and Technology,Suzhou University of Science and Technology,Suzhou 215009,Jiangsu,China)

机构地区：[1]苏州科技大学电子与信息工程学院,江苏苏州215009 [2]苏州科技大学物理科学与技术学院,江苏苏州1215009

出　　处：《激光与光电子学进展》2024年第10期146-152,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(62002254);江苏省自然科学基金(BK20200988);中国科协2022年度研究生科普能力提升项目(KXYJS2022019)。

摘　　要：立体成像技术广泛应用于增强现实、虚拟现实和混合现实,其中的虚拟空间动态几何畸变是影响视觉舒适度的重要因素。为了更合理地量化立体成像中的虚拟空间几何畸变,本文对立体影像获取、显示,以及人眼感知过程进行了分析,模拟了其中可能产生的各类几何畸变。同时,基于虚拟空间中物体的点云数据,以先分块再聚合的思想对畸变前后的点云进行对比分析,建立了静态几何畸变量化模型。再基于静态模型与物体运动属性的融合,得到动态几何畸变量化模型。为了验证所提方法的有效性,基于6组点云设计了10种不同程度的几何畸变。结果表明,所提方法在量化虚拟空间几何畸变时有最优的指标表现,皮尔逊线性相关系数达到0.93,可以准确地反映受测者所感知到的虚拟空间几何畸变。研究内容有望为立体显示几何畸变优化与视觉舒适度提升等研究提供理论参考。Three-dimensional(3D)imaging technology is widely used in augmented,virtual,and mixed realities.Dynamic virtual spatial distortion is an important factor that affects visual comfort.This study analyzes the processes involved in 3D image acquisition,display,and human eye perception to quantify the spatial distortion of virtual space in 3D imaging accurately.This study also simulates different spatial distortions that may occur in the process.The point cloud data of the object in the virtual space before and after distortion are compared and analyzed by first dividing and then aggregating.The quantitative model of static geometric distortion is thus established.The dynamic geometric distortion quantification model is obtained by combining the static model and the object motion attributes.The effectiveness of the proposed method is verified by simulating 10 different degrees of geometric distortion based on six groups of point clouds and comparing the subjective and objective consistencies between the proposed and classical method through subjective evaluation experiments.The results demonstrate that the proposed method has the best index performance in quantifying the geometric distortion of virtual space,and the Pearson's linear correlation coefficient obtained is O.93,which accurately reflects the geometric distortion perceived by the test subjects.The research will provide a theoretical reference for the research in geometric distortion optimization and visual comfort improvement of 3D displays.

关 键 词：三维显示 几何畸变 客观量化 视觉感知 视觉舒适度 

分 类 号：TN27[电子电信—物理电子学]