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Silicon Graphics Image

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Silicon Graphics Image
Filename extension
.sgi (among others)
Internet media type
image/sgi[1]
Type code'.SGI'
Developed byPaul Haeberli
Initial release0.95 / 1995; 30 years ago (1995)[2][3]
Latest release
1.00
1996; 29 years ago (1996)
Type of formatimage file
StandardSGI Image File Format[4]

Silicon Graphics Image (SGI) or the RGB file format is the native raster graphics file format for Silicon Graphics workstations.[3] The format was invented by Paul Haeberli.[3] It can be run-length encoded (RLE). Among others FFmpeg and ImageMagick support this format.

Background

Common file extensions are:

.sgi or .rgb
3 colour channels
.rgba
3 colour channels and alpha
.bw or .int
black and white
.inta
black and white and alpha

Originally developed for IRIX XnView also accepts file extension .iris. The master files of the SVT High Definition Multi Format Test Set are SGIs.[5][6][7] Frame 200 of the ParkJoy sequence in this set (3840×2160, 46.2 MB) was used in WebP comparisons.

See also

References

  1. ^ .sgi MIME type not registered at IANA
  2. ^ Paul Haeberli (1996). "The SGI Image File Format 0.97". Silicon Graphics. Archived from the original on 2009-01-11. Retrieved 2014-03-07. {{cite web}}: Cite has empty unknown parameter: |1= (help)
  3. ^ a b c "Encyclopedia of Graphics File Formats, Second Edition". O'Reilly. 1996-04. ISBN 1-56592-161-5. Retrieved 2014-03-07. {{cite web}}: Check date values in: |date= (help); Unknown parameter |authors= ignored (help)
  4. ^ Paul Haeberli (1996). "The SGI Image File Format 1.00". Silicon Graphics. Retrieved 2014-03-07. {{cite web}}: Cite has empty unknown parameter: |1= (help)
  5. ^ Lars Haglund (2006-02). "The SVT High Definition Multi Format Test Set" (PDF). SVT. Retrieved 2014-02-23. {{cite web}}: Check date values in: |date= (help)
  6. ^ "SVT_MultiFormat/2160p50_CgrLevels_Master_SVTdec05". Video Quality Experts Group (VQEG). 2006. Retrieved 2014-03-01.
  7. ^ "High-Quality Visual Experience: Creation, Processing and Interactivity of High-Resolution and High-Dimensional Video Signals". Springer. 2010. pp. 147–154. ISBN 9783642128011. {{cite web}}: Unknown parameter |authors= ignored (help)
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