Faster and higher quality global illumination

全局照明以非常高的计算成本为代价为计算机图形图像带来逼真和详细的照明环境。虽然大多数人没有意识到，但当他们看到新厨房设计的效果图时，在新建筑的公共展示中，以及在各种电影，广告和娱乐中，他们都会体验到它的形象。通过这种技术产生的计算机图像可以提供计算机图形学所能达到的最高形式的真实感，因为它模拟了间接光（从其他表面反射）这种真实感现在是上述应用的标准要求，并且它也在虚拟现实和科学可视化社区中越来越受欢迎，因为增加感知的优点，当前用于快速全局照明的方法限制了场景几何形状、光路深度、样本数量或场景中的材料。在这些限制下，它可以采用大型缓存的计算重用（仅在静态场景），或在GPU上创建简化的算法，但总是在降低渲染精度的成本。本研究的目的是朝着实时和准确的全局照明技术，探索新的方法有偏见的渲染方法。我们将应用分层技术，聚类，射线和光子统计和信息，边缘检测和联合收割机其他适当的技术，以减少复杂性和计算的全局照明，同时保持或提高视觉精度。这些改进的时间和渲染质量将在一个软件包中演示。改进的算法将允许上述应用领域以降低的成本产生更高质量的图像。

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.