Format
Silicon Graphics Image
Summary
- Name
- Silicon Graphics Image
- Identifiers
-
- MIME: image/x-sgi-bw
- PUID: x-fmt/140
- Format type
- Image (Raster)
- Description
- Silicon Graphics Image (SGI) or the RGB file format is the native raster graphics file format for Silicon Graphics workstations
- Format encoding
- Text
- File extensions
-
bw,rgb - Submitted by
- Digital Preservation Department / The National Archives
Internal signatures
Silicon Graphics Image
- Description
- Magic number (integer 474=0x01DA) + storage format (0 or 1) + number of bytes per pixel channel(1 or 2) + Number of dimensions (1, 2 or 3)+ number of channels (1, 3, or 4) + dummy + colour map id
- Provenance
- Paul Haeberli . The SGI Image File Format, Version 1.00, Silicon Graphics Computer Systems http://paulbourke.net/dataformats/sgirgb/sgiversion.html
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- None
- Byte Sequence
01DA(00|01)(01|02)00(01|02|03){4}00(01|03|04){80}00(00|01|02|03){368}0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000- Endianness
- Big-endian
Changelog
-
V78
- Release date
- 23 September 2014
-
Updated
Silicon Graphics Image: Description added.
-
V67
- Release date
- 26 February 2013
-
Updated
Silicon Graphics Image: Added .rgb as an external signature.
-
V58
- Release date
- 21 March 2012
-
Added signature
Silicon Graphics Image: Signature submitted by Georgia Tech Research Institute, USA.
-
Updated
Silicon Graphics Image: Format name changed for greater accuracy and consistency.