Radiance HDR
From Just Solve the File Format Problem
(Difference between revisions)
Dexvertbot (Talk | contribs) m (Change telparia.com samples link to template) |
|||
| (10 intermediate revisions by 4 users not shown) | |||
| Line 2: | Line 2: | ||
|formattype=electronic | |formattype=electronic | ||
|subcat=Graphics | |subcat=Graphics | ||
| − | |extensions={{ext|hdr}}, {{ext|rgbe}}, {{ext|xyze}}, {{ext|pic}} | + | |extensions={{ext|hdr}}, {{ext|rgbe}}, {{ext|xyze}}, {{ext|pic}}, {{ext|rad}} |
|mimetypes={{mimetype|image/vnd.radiance}} | |mimetypes={{mimetype|image/vnd.radiance}} | ||
| + | |pronom={{PRONOM|fmt/591}} | ||
}} | }} | ||
| − | |||
'''Radiance HDR''', also known as '''RGBE''' or '''Radiance Picture''', is raster image file format associated with the ''Radiance'' (or ''RADIANCE'') lighting simulation software by Greg Ward. It supports ''high dynamic range'' imaging, and may have been one of the first formats to do so. | '''Radiance HDR''', also known as '''RGBE''' or '''Radiance Picture''', is raster image file format associated with the ''Radiance'' (or ''RADIANCE'') lighting simulation software by Greg Ward. It supports ''high dynamic range'' imaging, and may have been one of the first formats to do so. | ||
| Line 12: | Line 12: | ||
There are at least two versions of the format. The documentation for the ra_rgbe utility says "The file format for RADIANCE pictures was changed between release 1.4 and release 2.0." | There are at least two versions of the format. The documentation for the ra_rgbe utility says "The file format for RADIANCE pictures was changed between release 1.4 and release 2.0." | ||
| + | |||
| + | == Identifiers == | ||
| + | The official filename extensions are '''.pic''', '''.hdr''', '''.rgbe''', and '''.xyze'''. Some third-party applications use '''.rad''', though that conflicts with [[Radiance Scene Description]] format. Some sources say that '''.img''' is also used. | ||
== Identification == | == Identification == | ||
| − | + | Files are supposed to begin with an ASCII signature of "<code>#?RADIANCE</code>". However, some apparently begin with "<code>#?RGBE</code>" instead, and some have no signature line at all. Note that some of Radiance's other file formats also use the "<code>#?RADIANCE</code>" signature. | |
| − | + | ||
| − | + | ||
== Specifications == | == Specifications == | ||
| Line 23: | Line 24: | ||
== Software == | == Software == | ||
* [http://radsite.lbl.gov/radiance/dist/ Radiance source code] | * [http://radsite.lbl.gov/radiance/dist/ Radiance source code] | ||
| − | * [http://www. | + | * [[ImageMagick]] (format named "HDR") |
| + | * [[Konvertor]] | ||
| + | * [[XnView]] | ||
| + | * [http://pfstools.sourceforge.net/index.html pfstools] | ||
| + | * [http://snisurset.net/code/abydos/ abydos] | ||
| + | * [http://www.hdrlabs.com/tools/links.html HDR Software] | ||
| + | |||
| + | == Sample files == | ||
| + | * [http://pfstools.sourceforge.net/hdr_gallery.html HDR Image Gallery] (also [http://sourceforge.net/p/pfstools/code/HEAD/tree/webpage/trunk/hdr_gallery/ here]) | ||
| + | * http://radsite.lbl.gov/radiance/pub/pics/index.html | ||
| + | * {{DexvertSamples|image/radiance}} | ||
| + | |||
| + | == See also == | ||
| + | * [[JPEG-HDR]] | ||
| + | * [[packPNM]] | ||
| + | * [[Radiance Scene Description]] | ||
== Links == | == Links == | ||
* [http://radsite.lbl.gov/radiance/ Radiance web site] | * [http://radsite.lbl.gov/radiance/ Radiance web site] | ||
| + | * [[Wikipedia:RGBE image format|Wikipedia: RGBE image format]] | ||
* [[Wikipedia:Radiance (software)|Wikipedia: Radiance]] | * [[Wikipedia:Radiance (software)|Wikipedia: Radiance]] | ||
* [http://www.iana.org/assignments/media-types/image/vnd.radiance Media type registration] | * [http://www.iana.org/assignments/media-types/image/vnd.radiance Media type registration] | ||
Latest revision as of 04:06, 28 December 2023
Radiance HDR, also known as RGBE or Radiance Picture, is raster image file format associated with the Radiance (or RADIANCE) lighting simulation software by Greg Ward. It supports high dynamic range imaging, and may have been one of the first formats to do so.
Contents |
[edit] Format
Each pixel is encoded as four bytes: three color values (RGB or XYZ), and a shared exponent.
There are at least two versions of the format. The documentation for the ra_rgbe utility says "The file format for RADIANCE pictures was changed between release 1.4 and release 2.0."
[edit] Identifiers
The official filename extensions are .pic, .hdr, .rgbe, and .xyze. Some third-party applications use .rad, though that conflicts with Radiance Scene Description format. Some sources say that .img is also used.
[edit] Identification
Files are supposed to begin with an ASCII signature of "#?RADIANCE". However, some apparently begin with "#?RGBE" instead, and some have no signature line at all. Note that some of Radiance's other file formats also use the "#?RADIANCE" signature.
[edit] Specifications
- http://radsite.lbl.gov/radiance/refer/filefmts.pdf ("Picture" file format)
[edit] Software
- Radiance source code
- ImageMagick (format named "HDR")
- Konvertor
- XnView
- pfstools
- abydos
- HDR Software
[edit] Sample files
- HDR Image Gallery (also here)
- http://radsite.lbl.gov/radiance/pub/pics/index.html
- dexvert samples — image/radiance
