OpenEXR

OpenEXR
Filename extension
.exr
Internet media typeimage/x-exr
Uniform Type Identifier (UTI)com.ilm.openexr-image[1]
Developed byIndustrial Light & Magic
Initial release1999 (1999)
Latest release
3.3.4[2]
9 June 2025 (9 June 2025)
Type of formatHigh-dynamic-range imaging
Open format?Yes, Modified BSD License
Websitewww.openexr.com Edit this at Wikidata

OpenEXR is a high-dynamic range, multi-channel raster file format, released as an open standard along with a set of software tools created by Industrial Light & Magic (ILM), under a free software license similar to the BSD license.[3]

It is notable for supporting multiple channels of potentially different pixel sizes, including 32-bit unsigned integer, 32-bit and 16-bit floating point values, as well as various compression techniques which include lossless and lossy compression algorithms. It also has arbitrary channels and encodes multiple points of view such as left- and right-camera images.[4]

  1. ^ "CGImageSource.SupportedTypes". Claris FileMaker MBS Plug-in. MonkeyBread Software.
  2. ^ "Release 3.3.4". 9 June 2025. Retrieved 14 June 2025.
  3. ^ "License". openexr.com.
  4. ^ Kainz, Florian; Bogart, Rod; Stanczyk, Piotr; Hillman, Peter (5 November 2013). "Technical Introduction to OpenEXR" (PDF). Industrial Light & Magic. Retrieved 2025-01-05.

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