HDR File Documentation

Overview

Feature Value
Format Name High Dynamic Range Image File
File Extension(s) .hdr
MIME Type image/vnd.radiance
Color Support High dynamic range
Bit Depth Typically 32-bit float per channel
Color Spaces Supported RGBE, XYZE
Compression Lossless RLE, optional JPEG-HDR, others
Transparency Support No
Metadata Support Limited
Animation Support No
Alpha Channel No
Standard No formal standard
Used For High fidelity imaging, 3D rendering, scientific applications
Pros High luminance range, versatile in image processing
Cons Limited support by software and devices, no standardization
Typical Usage Image editing, visual effects, computer graphics
Creator Greg Ward
Popular Software Support Adobe Photoshop, GIMP, Photomatix
Interoperability Can be converted to/from many standard formats
Licensing Open, with few restrictions
File Signature #?RADIANCE