基于球面全景图的虚拟场景实时漫游系统

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

Virtual Scene Real Time Navigation Based on Spherical Panorama

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 re-projecting 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.