Hierarchical Radiosity
نویسنده
چکیده
Radiosity algorithms serve as a tool to synthesize photorealistic images by calculating the energy exchange on surfaces in closed environments. The key idea to compute a solution of this global illumination problem is to subdivide every surface of a given 3-dimensional scene into planar polygons. Finite element methods can now be applied to accurately compute the propagation of energy in the scene due to surface reflection.
منابع مشابه
Hierarchical Monte Carlo Radiosity
Hierarchical radiosity and Monte Carlo radiosity are branches of radiosity research that focus on complementary problems. The synthesis of both families of radiosity algorithms has however received little attention until now. In this paper, a procedure is presented that bridges the gap. It allows any proposed hierarchical refinement strategy to be investigated in the context of an arbitrary dis...
متن کاملHIRAD: A Hierarchical Higher Order Radiosity Implementation
In this paper we describe our hierarchical higher order radiosity implementation, called HIRAD. We present a number of improvements to the original wavelet radiosity method: We propose new basis functions for (convex) quadrilaterals and for triangles offering finer granularity than the usual product-1D bases, a new refinement criterion for hierarchical refinement and a very general strategy for...
متن کاملLe contrôle de l'erreur dans la méthode de radiosité hiérarchique. (Error Control in Hierarchical Radiosity)
We introduce several improvements to the hierarchical radiosity method. First, a complete analysis of a specific implementation of the hierarchical radiosity method allows to point out its bottlenecks. Based on this analysis, we suggest two simple improvements: a lazy evaluation of top-level interactions, and a new refinement criterion, that greatly reduces the number of interactions, without l...
متن کاملGetting Rid of Links in Hierarchical Radiosity
Hierarchical radiosity with clustering has positioned itself as one of the most efficient algorithms for computing global illumination in non-trivial environments. However, using hierarchical radiosity for complex scenes is still problematic due to the necessity of storing a large number of transport coefficients between surfaces in the form of links. In this paper, we eliminate the need for st...
متن کاملA novel approach makes higher order wavelets really efficient for radiosity
Since wavelets were introduced in the radiosity algorithm5, surprisingly little research has been devoted to higher order wavelets and their use in radiosity algorithms. A previous study13 has shown that wavelet radiosity, and especially higher order wavelet radiosity was not bringing significant improvements over hierarchical radiosity and was having a very important extra memory cost, thus pr...
متن کاملLinear Radiosity with Error Estimation
We present a simple and inexpensive method for computing the estimates of error in a hierarchical linear radiosity method. Similar to the approach used in [1] for constant radiosity method, we compute lower and upper linear bounds of the actual radiosity function over the surface elements. We carry out this by computing linear upper and lower bounds of the kernel of the radiosity equation. Also...
متن کامل