Practical HDR Texture Compression

The use of high dynamic range (HDR) textures in real‐time graphics applications can increase realism and provide a more vivid experience. However, the increased bandwidth and storage requirements for uncompressed HDR data can become a major bottleneck. Hence, several recent algorithms for HDR textur...

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Bibliographic Details
Published in:Computer graphics forum Vol. 27; no. 6; pp. 1664 - 1676
Main Authors: Munkberg, J., Clarberg, P., Hasselgren, J., Akenine-Möller, T.
Format: Journal Article
Language:English
Published: Oxford, UK Blackwell Publishing Ltd 01.09.2008
Subjects:
Algorithms
Computer and Information Sciences
Computer graphics
Computer programming
Computer Sciences
Data compression
Data- och informationsvetenskap (Datateknik)
Datavetenskap (Datalogi)
E.4 [Coding and Information Theory]: Data compaction and compression
HDR images
I.3.7 [Computer Graphics]: Texture
I.4.2 [Image Processing and Computer Vision]: Compression (Coding)
Natural Sciences
Naturvetenskap
Procrustes analysis
Realism
Studies
texture compression
ISSN:0167-7055, 1467-8659, 1467-8659
Online Access:Get full text
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Summary:The use of high dynamic range (HDR) textures in real‐time graphics applications can increase realism and provide a more vivid experience. However, the increased bandwidth and storage requirements for uncompressed HDR data can become a major bottleneck. Hence, several recent algorithms for HDR texture compression have been proposed. In this paper, we discuss several practical issues one has to confront in order to develop and implement HDR texture compression schemes. These include improved texture filtering and efficient offline compression. For compression, we describe how Procrustes analysis can be used to quickly match a predefined template shape against chrominance data. To reduce the cost of HDR texture filtering, we perform filtering prior to the colour transformation, and use a simple trick to reduce the incurred errors. We also introduce a number of novel compression modes, which can be combined with existing compression schemes, or used on their own.
Bibliography:istex:BC223DFFF68B87A581B954613A9ACF4B5877972A
ArticleID:CGF1174
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ISSN:0167-7055
1467-8659
1467-8659
DOI:10.1111/j.1467-8659.2008.01174.x