虚拟布景系统在气象影视业务中的应用

Application of Virtual Setting System to Meteorological Video Service

从虚拟演播室技术演变、原理、系统结构、渲染方式等方面,全面分析了虚拟布景系统与传统演播室相比所具备的优势。虚拟布景系统来源于虚拟演播室,但在硬件上却省去了支持场景实时渲染的图形工作站、摄像机传感系统、延时系统,价格优势明显;虚拟布景系统的场景采用前期合成方式,比实时渲染对计算机性能要求条件低。虚拟场景中三维物体的边缘处理、反走样、光线跟踪、镜头特效等方面较实时渲染效果更佳,抠像效果可与昂贵的三维虚拟演播室相媲美,从场景设计角度考虑更能发挥制作者的创意,而且具有良好的升级空间,非常适合气象影视业务部门使用。

From the aspects of technology evolution, theory, system structure and rendering methods of virtual studio, the advantages of virtual setting system comparing with the traditional studio are comprehensively analyzed. Although virtual setting system roots in virtual studio, real -time rendering graphics workstations, camera sensor system and time delay system for scene supporting are omitted, and its price are much lower; pre- scenes method is adopted in virtual setting system, so the computer performance requirement is lower than that in real - time rendering. Edge processing, antialiasing, ray - tracing and special lens effect on three - dimensional object are better than real - time rendering, the image cutting effect is as fine as that from expensive three - dimensional virtual studio. Considered from scene designing, producers＇ creativity can be smoothly embodied. Furthermore, it has a better upgrade space. As a consequence, virtual setting system is very suitable for meteorological video service.