201 Silicon Graphics Image Image (Raster) Silicon Graphics Image (SGI) or the RGB file format is the native raster graphics file format for Silicon Graphics workstations Text 1 Digital Preservation Department / The National Archives 02 Aug 2005 16 Mar 2012 image/x-sgi-bw MIME x-fmt/140 PUID bw File extension rgb File extension 623 Silicon Graphics Image 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 1 Absolute from BOF 0 Big-endian 01DA(00|01)(01|02)00(01|02|03){4}00(01|03|04){80}00(00|01|02|03){368}0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000