Real-time image based lighting with streaming HDR-lightprobe sequences
2012 (English)In: Proceedings of SIGRAD 2012 / [ed] Andreas Kerren, Stefan Seipel, Linköping, Sweden, 2012Conference paper, Presentation (Other academic)
We present a framework for shading of virtual objects using high dynamic range (HDR) light probe sequencesin real-time. Such images (light probes) are captured using a high resolution HDR camera. In each frame ofthe HDR video, an optimized CUDA kernel is used to project incident lighting into spherical harmonics in realtime. Transfer coefficients are calculated in an offline process. Using precomputed radiance transfer the radiancecalculation reduces to a low order dot product between lighting and transfer coefficients. We exploit temporalcoherence between frames to further smooth lighting variation over time. Our results show that the frameworkcan achieve the effects of consistent illumination in real-time with flexibility to respond to dynamic changes in thereal environment.
Place, publisher, year, edition, pages
Linköping, Sweden, 2012.
High Dynamic Range video, HDR-video, Image based lighting, precomputed radiance transfer
Media and Communication Technology Computer Science
IdentifiersURN: urn:nbn:se:liu:diva-87260ISBN: 978-91-7519-723-4OAI: oai:DiVA.org:liu-87260DiVA: diva2:587377
Interactive Visual Analysis of Data (SIGRAD 2012), 29–30 November 2012, Växjö, Sweden