关于电影实时预演仿真系统优化设计研究

Research on Optimal Designing Real-Time Pre-Visualization Simulation System for Movies

预演是一种在影视拍摄的过程中为创编人员提供实拍前预览的技术。预演在影视拍摄流程中是一项很重要的工作,对于预演的技术拓展也一直在进行。针对传统预演的方法与真实拍摄差异较大且不同步、提前制作耗费时间长、难以随意修改、人工成本高等特点,为了更加准确、高效的实现预演目标,设计了一套电影实时预演仿真系统。利用无人机拍摄自然地形的倾斜影像辅助进行快速三维建模;使用光学式动作捕捉结合半实物仿真设计了一种用于实时虚拟拍摄的摄像机,实时记录摄像机位置姿态数据并输出标准数据复用于真实设备,实时渲染真实场景进行虚拟拍摄进行实时预演。经过实际影片的拍摄实践,运行时帧率达到实时的要求,获得了较好的预演效果,具备实际意义及推广性。

Pre-visualization is a technique that provides previewing of real shooting for the creators during the filming process.The traditional pre-visualization method is very different from the real shooting process,while the pre-rendering is a waste of time and money,the result is difficult to modify.Therefore,to achieve a more accurate and efficient result,a real-time pre-visualization simulation prototype system for movies was developed.To meet the needs of pre-visualization,this system used image modeling methods to assist three-dimensional modeling and used optical motion capture technology as a semi-physical camera to provide tracking and positioning,output reusable standard camera motion data,and make virtual cinematography.The system has achieved the desired results with real film,and the runtime frame rate can meet the real-time requirements.It has practical significance and promotion.