Real-time image based lighting in software using HDR panoramas

Authors:
Jonas Unger;Magnus Wrenninge;Mark Ollila
Affiliations:
Linköping University, Sweden;Linköping University, Sweden;Linköping University, Sweden
Venue:
Proceedings of the 1st international conference on Computer graphics and interactive techniques in Australasia and South East Asia
Year:
2003

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Abstract

We present a system allowing real-time image based lighting based on HDR panoramic images [Debevec 1998]. The system performs time-consuming diffuse light calculations in a pre-processing step, which is key to attaining interactivity. The real-time subsystem processes an image based lighting model in software, which would be simple to implement in hardware. Rendering is handled by OpenGL, but could be substituted for another graphics API, should there be such a need. Applications for the technique presented are discussed, and includes methods for realistic outdoor lighting. The system architecture is outlined, describing the algorithms used. Lastly, the ideas for future work that arose during the project are discussed