全景影像快速加载与精确量测算法研究  

Research on fast loading and accurate measurement algorithm for panoramic images

作　　者：刘冰[1,2] 郭李丽 刘如飞 苏辕[3] 徐超 LIU Bing;GUO Lili;LIU Rufei;SU Yuan;XU Chao(College of Geodesy and Geomatics,Shandong University of Science and Technology,Qingdao 266590,China;College of Computer Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Qingdao Digital World Information Technology Co.Ltd,Qingdao 266427,China)

机构地区：[1]山东科技大学测绘与空间信息学院,山东青岛266590 [2]山东科技大学计算机科学与工程学院,山东青岛266590 [3]青岛数字世界信息科技有限公司,山东青岛266427

出　　处：《山东科技大学学报（自然科学版）》2024年第4期57-66,共10页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(42001414);山东科技大学“菁英计划”科研支持项目(0104060541613)。

摘　　要：针对全景影像加载速度慢及量测精度低的问题,提出一种全景球金字塔切片模型动态约束加载算法。首先,基于格网球体投影模型构建三维全景场景;其次,对全景影像进行压缩与切片,并设计全景切片金字塔模型;然后,采用逆向墨卡托投影将全景切片作为纹理映射到球体内表面进行渲染,形成全景球金字塔切片模型;最后,按照可视区域约束对金字塔模型切片进行快速加载实现动态可视化,并结合深度图像实现全景影像的精确量测。实验结果表明,选用顶点数量为11904的全景球金字塔切片模型,量测中误差小于3 cm,同时提高了加载速度。To address the problems of slow loading speed and low measurement accuracy of panoramic images,this study proposed a dynamic constraint loading algorithm for the panoramic sphere pyramid slicing model.Firstly,the 3D panoramic scene was constructed based on the grid sphere projection model.Secondly,the panoramic image was compressed and sliced,and a panoramic slice pyramid model was designed.Then,the panoramic slices were rendered as texture mapping to the inner surface of the sphere by using inverse Mercator projection to form a panoramic sphere pyramid slice model.Finally,the pyramid model slices were quickly loaded according to the visual area constraints to achieve dynamic visualization,and combined with depth images to achieve accurate measurement of the panoramic image.The experimental results show that by choosing the panoramic sphere pyramid slicing model with a vertex number of 11904,the error in the measurement is less than 3 cm,and the loading speed is improved at the same time.

关 键 词：加载速度 量测精度 全景球金字塔切片模型 全景影像 逆向墨卡托投影 深度图像 

分 类 号：P209[天文地球—测绘科学与技术]