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August 12, 2004
SIGGRAPH: ILM ANNOUNCES UPDATE TO OPENEXR FILE FORMAT SAN RAFAEL, CA - In conjunction with this year's SIGGRAPH show, Industrial Light & Magic has announced an update to OpenEXR (, its open source extended dynamic range image file format. The update is part of a continuing effort by the studio to promote an open source industry standard for an extended dynamic range file format.

OpenEXR is a 16- and 32-bit, floating point file format with greater dynamic range than existing 8- and 10-bit file formats. It does not require a graphics card and is fully compatible with the floating-point pixel formats supported by the latest graphics hardware. Its lossless data compression achieves compression ratios of 2:1 for scanned film images.

New features in the latest version include support for tiled images, a new Pxr24 compressor that was contributed by Pixar Animation Studios, and support of higher dynamic range YCA images with sub-sampled chroma channels.

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