基于虚拟地理环境的室内火灾真实感可视化

Photorealistic Visualization of Indoor Fire Disaster Based on Virtual Geographic Environment

针对现有火灾可视化表达方法不能有效集成地理信息、真实感效果不强、结果不具有真实性等问题,探讨基于火灾数值模拟计算结果进行火灾可视化表达研究的理论,形成一套基于虚拟地理环境的火灾真实感可视化与优化方法,详细探讨火灾数值模型及模拟计算结果、火灾虚拟地理环境的构建、火灾温度与可视化效果之间的映射关系、火灾真实感可视化、场景优化等关键技术。最后以一栋室内房屋为例,开展火灾虚拟地理环境构建以及真实感可视化、优化与分析试验。试验结果表明,本文方法不仅能够集成火灾真实结果信息,还能通过优化提升效率以实现较好的火灾可视化表达效果,能够支持相关人员进行火灾决策分析。

Current visualization methods for fire disaster could not integrate geographic information effectively. The sense of reality is not so strong and its result is unrealistic. To solve these problems, this paper new methods of fire disaster visualization theory and approach based on numerical simulation. A set of photorealistic visualization approaches have been developed for indoor fire disaster in virtual geographic environment. Issues including development of fire numerical model, evaluation of simulation results, construction of fire virtual geographic environment, mapping relationship between fire temperature and visualization effects, photorealistic visualization of fire disaster, optimization of scene have all been studied. The approach is applied to an indoor building. Results indicate that this approach can effectively integrate fire disaster information and provide better visualization effects by improvement of the efficiency. It helps make decisions for indoor fire disasters.