Importance Sampling Spherical Harmonics

@article{Jarosz2009ImportanceSS,
  title={Importance Sampling Spherical Harmonics},
  author={Wojciech Jarosz and Nathan A. Carr and Henrik Wann Jensen},
  journal={Comput. Graph. Forum},
  year={2009},
  volume={28},
  pages={577-586}
}
In this paper we present the first practical method for importance sampling functions represented as spherical harmonics (SH). Given a spherical probability density function (PDF) represented as a vector of SH coefficients, our method warps an input point set to match the target PDF using hierarchical sample warping. Our approach is efficient and produces high quality sample distributions. As a by-product of the sampling procedure we produce a multi-resolution representation of the density… CONTINUE READING
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