Smart Links and Efficient Reconstruction for Wavelet Radiosity
Wavelet radiosity is the unification of two important methods to solve the radiosity equation: hierarchical radiosity and Galerkin radiosity. Al-though wavelet radiosity can reap the benefits of both methods, there is still a lot of overhead and in practice several problems occur. For example, using Haar wavelets the traditional push-pull scheme leads to obviously wrong results near common patch boundaries. Moreover, interaction between partially visible patches leads to unnecessarily fine subdivisions, and higher order wavelets introduce a significant overhead for low-power links. In this article we propose a set of smart links that cope with these problems and can increase both the efficiency of the algorithm and the quality of the solution.
Additionally, we show how the expensive traditional reconstruction step that is required for piecewise constant basis functions can be avoided in the case of flatlets.
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