OpenEXR

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File Format
Name OpenEXR
Ontology
Extension(s) .exr
PRONOM fmt/1001
Released 2003

OpenEXR (also known as EXR or IlmImf) is a raster image file format developed by Industrial Light & Magic. It supports high dynamic range images. It usually uses 16-bit "half precision" floating point samples, though other sample formats are also supported.

Contents

Identification

Files start with bytes 76 2F 31 01.

Specifications

The written documentation is unofficial. The format is defined as "whatever the IlmImf Library reads and writes."

Software

  • The IlmImf Library, a.k.a. The OpenEXR source distribution (C++): OpenEXR Downloads → openexr-x.x.x.tar.gz, ilmbase-x.x.x.tar.gz

Sample files

The IlmImf Library includes some samples files for testing.

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