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OpenEXR project is a high dynamic-range (HDR) image file format for use in computer imaging applications.




OpenEXR project is a high dynamic-range (HDR) image file format developed by Industrial Light & Magic for use in computer imaging applications.

OpenEXR is used by ILM on all motion pictures currently in production. The first movies to employ OpenEXR were Harry Potter and the Sorcerers Stone, Men in Black II, Gangs of New York, and Signs. Since then, OpenEXR has become ILM's main image file format.

Here are some key features of "OpenEXR":

· Higher dynamic range and color precision than existing 8- and 10-bit image file formats.
· Support for 16-bit floating-point, 32-bit floating-point, and 32-bit integer pixels. The 16-bit floating-point format, called "half", is compatible with the half data type in NVIDIA's Cg graphics language and is supported natively on their new GeForce FX and Quadro FX 3D graphics solutions.
· Multiple lossless image compression algorithms. Some of the included codecs can achieve 2:1 lossless compression ratios on images with film grain.
· Extensibility. New compression codecs and image types can easily be added by extending the C++ classes included in the OpenEXR software distribution. New image attributes (strings, vectors, integers, etc.) can be added to OpenEXR image headers without affecting backward compatibility with existing OpenEXR applications.

What's New in This Release:

· This release reduces generational loss in B44- and B44A-compressed images.
· B44A compression has been added.
· Various bugs have been fixed, including a buffer overrun.
Last updated on July 26th, 2012

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