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Proceedings of the 29th annual conference on Computer graphics and interactive techniques
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EGRW '02 Proceedings of the 13th Eurographics workshop on Rendering
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ACM SIGGRAPH 2003 Papers
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ACM SIGGRAPH 2003 Papers
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ACM SIGGRAPH 2003 Papers
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ACM SIGGRAPH 2004 Papers
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ACM SIGGRAPH 2005 Papers
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ACM SIGGRAPH 2005 Papers
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ACM SIGGRAPH 2005 Papers
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ACM SIGGRAPH 2006 Papers
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ACM SIGGRAPH 2006 Papers
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ACM SIGGRAPH 2006 Papers
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EGSR'04 Proceedings of the Fifteenth Eurographics conference on Rendering Techniques
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EGSR'06 Proceedings of the 17th Eurographics conference on Rendering Techniques
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EGSR'06 Proceedings of the 17th Eurographics conference on Rendering Techniques
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EGSR'06 Proceedings of the 17th Eurographics conference on Rendering Techniques
A framework for precomputed and captured light transport
ACM Transactions on Graphics (TOG)
Precomputation-Based Rendering
Foundations and Trends® in Computer Graphics and Vision
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This paper presents a method for efficient compression and relighting with high-resolution, precomputed light transport matrices. We accomplish this using a 4D wavelet transform, transforming the columns of the transport matrix, in addition to the 2D row transform used in previous work. We show that a standard 4D wavelet transform can actually inflate portions of the matrix, because high-frequency lights lead to high-frequency images that cannot easily be compressed. Therefore, we present an adaptive 4D wavelet transform that terminates at a level that avoids inflation and maximizes sparsity in the matrix data. Finally, we present an algorithm for fast relighting from adaptively compressed transport matrices. Combined with a GPU-based precomputation pipeline, this results in an image and geometry relighting system that performs significantly better than 2D compression techniques, on average 2x-3x better in terms of storage cost and rendering speed for equal quality matrices.