Statistical hair scattering model
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United States of America Patent
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Feb 27, 2018
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Mar 24, 2015
filing date -
Mar 27, 2014
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Abstract
Systems, devices, and methods are provided for rendering images of hair using a statistical light scattering model for hair that approximates ground truth physical models. The model is significantly faster than other implementations of the Marschner hair model. The statistical light scattering model includes all the features of Marschner such as eccentricity for elliptical cross-sections, and extends them by adding azimuthal roughness control, consideration of natural fiber torsion, and full energy preserving. Adaptive Importance Sampling (AIS) is specialized to fit easily sampled distributions to bidirectional curve scattering density functions (BCSDFs) of the model.
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