OpenEXR
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.
| Filename extension |
.exr |
|---|---|
| Internet media type | image/x-exr |
| Uniform Type Identifier (UTI) | com.ilm.openexr-image |
| Developed by | Industrial Light & Magic |
| Initial release | 1999 |
| Latest release | 3.1.5 12 April 2022 |
| Type of format | High-dynamic-range imaging |
| Open format? | Yes, Modified BSD License |
| Website | www |
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.
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