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Silicon Graphics Image

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Silicon Graphics Image (SGI) or the RGB file format is the native raster graphics file format for Silicon Graphics workstations.

Common file endings are:

  • SGI or RGB 3 colour channels
  • RGBA 3 colour channels and alpha
  • INT or BW black and white
  • INTA black and white and alpha

It can be run-length encoded (RLE).

The format was invented by Paul Haeberli.