Real-time image based lighting with streaming HDR-light probe sequences

SIGRAD 2012 - 2012
Download the publication : EGauthorGuidelines-sigrad12-fin.pdf [12.9Mo]  
We present a framework for shading of virtual objects using high dynamic range (HDR) light probe sequences in real-time. Such images (light probes) are captured using a high resolution HDR camera. In each frame of the HDR video, an optimized CUDA kernel is used to project incident lighting into spherical harmonics in real time. Transfer coefficients are calculated in an offline process. Using precomputed radiance transfer the radiance calculation reduces to a low order dot product between lighting and transfer coefficients. We exploit temporal coherence between frames to further smooth lighting variation over time. Our results show that the framework can achieve the effects of consistent illumination in real-time with flexibility to respond to dynamic changes in the real environment.

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BibTex references

@InProceedings\{HKMU12,
  author       = "Hajisharif, Saghi and Kronander, Joel and Miandji, Ehsan and Unger, Jonas",
  title        = "Real-time image based lighting with streaming HDR-light probe sequences",
  booktitle    = "SIGRAD 2012",
  year         = "2012"
}

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