摘要
设计并实现一种基于球面全景图的虚拟场景实时漫游系统。虚拟场景的实时漫游可以通过对球面全景图进行重投影完成。通过重投影球面全景图的可视部分到视平面上,可以生成虚拟场景在不同视线方向上的透视视图。使用球面全景图的重投影算法可以模拟相机的旋转运动,通过改变相机的视域,可以模拟相机的变焦运动。针对直接使用重投影不能满足球面全景图实时绘制的问题,在对球面全景图的重投影算法进行仔细分析的基础上,提出使用查找表和增量计算进行加速的策略。实验结果表明,优化后的系统能够对基于球面全景图的虚拟场景进行实时漫游。
A virtual scene real time navigation system is designed and implemented based on spherical panorama. Spherical panorama rendering can be achieved by re-projection method. Different perspective views of the virtual scene can be obtained by reprojecting visible portion of the spherical panorama onto the view plane. Camera rotation can be accomplished with the re-projection of a spherical panorama and image rotation, and camera zooming can be accomplished through changing the camera＇ s field of view. In order to achieve real-time rendering demand, the paper analyses the re-projection process carefully and uses look-up tables and incremental computing to accelerate spherical panorama rendering. The system can render virtual scene based on spherical panorama in real time with high frame per second.
出处
《计算机与现代化》
2016年第2期1-4,10,共5页
Computer and Modernization
基金
国家自然科学基金资助项目(61462078)
云南省教育厅基金资助项目(2015Y285)
关键词
球面全景图
图像重投影
实时绘制
查找表
增量计算
spherical panorama
image re-projection
real-time rendering
look-up table
incremental computing
