OpenEXR provides the specification and reference implementation of the EXR file format, the professional-grade image storage format of the motion picture industry.
The purpose of EXR format is to accurately and efficiently represent high-dynamic-range scene-linear image data and associated metadata, with strong support for multi-part, multi-channel use cases.
OpenEXR is widely used in host application software where accuracy is critical, such as photorealistic rendering, texture access, image compositing, deep compositing, and DI.
OpenEXR is a project of the Academy Software Foundation.
The OpenEXR project includes Imath, a basic, light-weight, and efficient C++ representation of 2D and 3D vectors and matrices and other simple but useful mathematical objects, functions, and data types common in computer graphics applications, including the half 16-bit floating-point type.
Imath also includes optional python bindings for all types and functions, including optimized implementations of vector and matrix arrays.
For a simple program that uses the C++ API to read and write a
.exr file, see the
Hello, World examples.
Ask a question:
Attend a meeting:
Technical Steering Committee meetings are open to the public, fortnightly on Thursdays, 1:30pm Pacific Time.
Report a bug:
Submit an Issue: https://github.com/AcademySoftwareFoundation/openexr/issues
Report a security vulnerability:
Contribute a Fix, Feature, or Improvement:
Read the Contribution Guidelines and Code of Conduct
Sign the Contributor License Agreement
Submit a Pull Request: https://github.com/AcademySoftwareFoundation/openexr/pulls
Reference images: https://github.com/AcademySoftwareFoundation/openexr-images
Security policy: SECURITY.md
Release notes: CHANGES.md
Porting Guide: OpenEXR/Imath 2.x to 3.x Porting Guide