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Faster and higher quality global illumination

更快、更高质量的全局照明

基本信息

批准号：
EP/I031243/1
负责人：
Mark Jones
金额：
$ 31.47万
依托单位：
Swansea University
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2011
资助国家：
英国
起止时间：
2011 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FI031243%2F1
关键词：
Faster higher quality global illumination

项目摘要

Global illumination brings realistic and detailed lighting environments to Computer Graphics imagery at the expense of very high computational cost. Although most people are unaware, they experience its imagery when they have renderings of a new kitchen design, in public displays of new architecture, and in a variety of film, advertising and entertainment. The computer imagery produced by this technique can deliver the highest form of realism achievable by Computer Graphics as it models indirect light (reflected from other surfaces) and not just light direct from light sources in the scene.Such realism is now a standard requirement for the above applications and it is also gaining popularity in the virtual reality and scientific visualization communities as the advantages of increased perception and understanding are now recognised and outweigh the disadvantages of production time.Current approaches for fast global illumination place limits on the scene geometry, depth of light paths, numbers of samples, or the materials in the scene. Within these limitations it is possible to employ large caches for computation reuse (only in static scenes), or create simplified algorithms on the GPU, but always at the cost of reducing rendering accuracy.The aim of this research is to work towards real-time and accurate global illumination techniques by exploring new approaches to biased rendering methods. We will apply hierarchical techniques, clustering, ray and photon statistics and information, edge detection and combine other appropriate techniques to reduce the complexity and computation of global illumination whilst maintaining or enhancing visual accuracy.These improved timings and render quality will be demonstrated within a software package. The improved algorithms will allow the above application areas to produce higher quality images at reduced cost.

全局照明为计算机图形图像带来了真实且详细的照明环境，但代价是非常高的计算成本。尽管大多数人都没有意识到，但当他们看到新厨房设计的效果图、新建筑的公共展示以及各种电影、广告和娱乐时，他们都会体验到它的形象。通过该技术生成的计算机图像可以提供计算机图形学可实现的最高形式的真实感，因为它模拟间接光（从其他表面反射），而不仅仅是来自场景中光源的直接光。这种真实感现在是上述应用的标准要求，并且它在虚拟现实和科学可视化社区中也越来越受欢迎，因为增强感知和理解的优点现在已被认识到并超过了生产的缺点当前快速全局照明的方法对场景几何形状、光路深度、样本数量或场景中的材质施加了限制。在这些限制下，可以采用大型缓存进行计算重用（仅在静态场景中），或者在 GPU 上创建简化的算法，但总是以降低渲染精度为代价。本研究的目的是通过探索偏置渲染方法的新方法来实现实时和准确的全局照明技术。我们将应用分层技术、聚类、射线和光子统计和信息、边缘检测并结合其他适当的技术来降低全局照明的复杂性和计算，同时保持或增强视觉准确性。这些改进的时序和渲染质量将在软件包中得到演示。改进的算法将使上述应用领域能够以更低的成本生成更高质量的图像。