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    ISHair: Importance Sampling for Hair Scattering

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    Date
    2012
    Author
    Ou, Jiawei
    Xie, Feng
    Krishnamachari, Parashar
    Pellacini, Fabio
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    Abstract
    We present an importance sampling method for the bidirectional scattering distribution function (bsdf) of hair. Our method is based on the multi-lobe hair scattering model presented by Sadeghi et al. [SPJT10]. We reduce noise by drawing samples from a distribution that approximates the bsdf well. Our algorithm is efficient and easy to implement, since the sampling process requires only the evaluation of a few analytic functions, with no significant memory overhead or need for precomputation. We tested our method in a research raytracer and a production renderer based on micropolygon rasterization. We show significant improvements for rendering direct illumination using multiple importance sampling and for rendering indirect illumination using path tracing.
    BibTeX
    @article {10.1111:j.1467-8659.2012.03150.x,
    journal = {Computer Graphics Forum},
    title = {{ISHair: Importance Sampling for Hair Scattering}},
    author = {Ou, Jiawei and Xie, Feng and Krishnamachari, Parashar and Pellacini, Fabio},
    year = {2012},
    publisher = {The Eurographics Association and Blackwell Publishing Ltd.},
    DOI = {10.1111/j.1467-8659.2012.03150.x}
    }
    URI
    http://dx.doi.org/10.1111/j.1467-8659.2012.03150.x
    Collections
    • 31-Issue 4
    • EGSR12: 23th Eurographics Symposium on Rendering

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