Blurring of Light due to Multiple Scattering by Participating Medium : A Path Integral Approach

Volumetric light transport effects are significant for many materials like skin, smoke, clouds or water. In particular, one must consider the multiple scat tering of light within the volume. Recently, we presented a path integral-based approach to th is problem which identifies the most probable path light takes in the medium and approximate s en rgy transport over all paths by only those surrounding this most probable one. In th is report we use the same approach to derive useful expressions for the amount of spac ial nd angular blurring light experiences as it travels through a medium. Blurring of Light due to Multiple Scattering by Participating Medium: A Path Integral Approach Michael Ashikhmin Simon Premože Ravi Ramamoorthi Shree Nayar May 31, 2004 Abstract Volumetric light transport effects are significant for many materials like skin, smoke, clouds or water. In particular, one must consider the multiple scattering of light within the volume. Recently, we presented a path integral-based approach to this problem which identifies the most probable path light takes in the medium and approximates energy transport over all paths by only those surrounding this most probable one. In this report we use the same approach to derive useful expressions for the amount of spacial and angular blurring light experiences as it travels through a medium.Volumetric light transport effects are significant for many materials like skin, smoke, clouds or water. In particular, one must consider the multiple scattering of light within the volume. Recently, we presented a path integral-based approach to this problem which identifies the most probable path light takes in the medium and approximates energy transport over all paths by only those surrounding this most probable one. In this report we use the same approach to derive useful expressions for the amount of spacial and angular blurring light experiences as it travels through a medium.

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