Abstract

We consider the task of capturing the result of a researcher-driven stereo visualization of a complex dynamic virtual scene into a video sequence of stereo pairs (stereo clip) of ultrahigh resolution. An efficient technology of deferred synthesis of stereo clips is proposed. It allows one to create stereo clips without interfering with real-time visualization. The technology includes real-time construction of visualization scenario and offline transformation of the scenario into a stereo clip. Methods for implementing these stages for the task of stereo visualization of the saturation isosurface of displacing fluid are considered. For this purpose, a special file format «scr» for the visualization scenario is developed on the basis of chunk data structures. This format provides a compact representation of neighboring repeated frames. The scenario file is transformed into a sequence of 4K stereo pairs by means of the offscreen rendering technology of the virtual scene, and stereo pairs are added to the stereo clip using a number of open-source FFmpeg libraries designed for processing digital video content. The generated stereo clip is placed within an MP4 container, and the video compressing standard H.264 is used. The proposed technologies and methods of 4K stereo clip deferred synthesis are implemented in a software designed for visualizing simulation results of the unstable displacement of oil from porous media. Using this software, a 4K stereo clip is created, which illustrates the evolution of the saturation isosurface during the process of unstable oil displacement. Testing confirmed the validity of the solution. The software can be used in virtual laboratories, for designing virtual environment systems and scientific visualization systems, in educational applications etc.

中文翻译：

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复杂动态虚拟场景的4K立体剪辑的延迟合成技术和方法

摘要

我们考虑的任务是将研究人员驱动的复杂动态虚拟场景的立体可视化结果捕获为超高分辨率的立体对（立体声剪辑）视频序列。提出了一种有效的立体声剪辑延迟合成技术。它允许人们创建立体剪辑，而不会干扰实时可视化。该技术包括可视化场景的实时构建以及将场景脱机转换为立体声剪辑。考虑了实现这些阶段以实现驱替液饱和等值面立体可视化任务的方法。为此，在块数据结构的基础上为可视化场景开发了一种特殊的文件格式“ scr”。此格式提供了相邻重复帧的紧凑表示。通过虚拟场景的屏幕外渲染技术将场景文件转换为4K立体声对序列，并使用许多用于处理数字视频内容的开源FFmpeg库将立体声对添加到立体声片段。生成的立体声剪辑放置在MP4容器中，并使用视频压缩标准H.264。4K立体剪辑延迟合成的建议技术和方法在软件中实现，该软件设计用于可视化油从多孔介质中不稳定位移的模拟结果。使用该软件，创建了一个4K立体剪辑，该剪辑说明了不稳定油驱替过程中饱和等值面的演变。测试证实了该解决方案的有效性。该软件可以在虚拟实验室中使用，