{
 "id": "gem-raster",
 "name": "GEM Raster",
 "category": "image",
 "identifiers": {
  "extensions": [
   "img",
   "ximg",
   "timg"
  ],
  "mime": [
   "application/gem"
  ],
  "puid": [
   "x-fmt/159"
  ],
  "wikidata": [
   "Q28206162"
  ],
  "magic": [
   {
    "offset": 0,
    "hex": "0001000800",
    "notes": "GEM Paint Image"
   },
   {
    "offset": 0,
    "hex": "eb3c902a"
   }
  ],
  "signatures": [
   {
    "name": "GEM Paint Image",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "0001000800(01|04)0002"
     }
    ]
   }
  ]
 },
 "status": "readable",
 "summary": "The GEM raster format (also known as GEM VDI Bit Image; GEM Bit Image; GEM Image; GEM Bitmap; or IMG) is an image format native to the Graphical Environment Manager (GEM) operating system and developed at Digital Research. The format was used by GEM Paint and Ventura Publisher, and by a variety of Atari ST software. GEM raster images may be color, gray scale, or black and white and are always read and written in the big-endian format. The format of bi-level images is well standardized, but the specification is ambiguous as to the format of color images. As a result, other color formats of GEM raster image were later developed, some of which have their own names, such as XIMG (Extended GEM Bit Image), TIMG (TrueColor IMG), STTT, or Hyperpaint.",
 "tools": [
  {
   "name": "Abydos",
   "url": "https://www.wikidata.org/wiki/Q133445760",
   "reads": true,
   "writes": false,
   "license": "GNU Lesser General Public License",
   "open_source": true
  },
  {
   "name": "Corel Presentations 11",
   "url": "https://www.wikidata.org/wiki/Q64857783",
   "reads": true,
   "writes": true
  },
  {
   "name": "CorelDRAW Graphics Suite",
   "url": "https://www.wikidata.org/wiki/Q5788503",
   "reads": true,
   "writes": false
  },
  {
   "name": "Funny Faces",
   "url": "https://www.wikidata.org/wiki/Q122511365",
   "reads": true,
   "writes": false
  },
  {
   "name": "Hijaak Digital Photo Studio",
   "url": "https://www.wikidata.org/wiki/Q117814372",
   "reads": true,
   "writes": true
  },
  {
   "name": "Image Alchemy",
   "url": "https://www.wikidata.org/wiki/Q28205547",
   "reads": true,
   "writes": false
  },
  {
   "name": "IrfanView",
   "url": "https://www.irfanview.com/",
   "reads": true,
   "writes": false,
   "license": "freeware"
  },
  {
   "name": "PaintShop Photo Pro X3",
   "url": "https://www.wikidata.org/wiki/Q122675173",
   "reads": true,
   "writes": true
  },
  {
   "name": "PaintShop Pro X6 Ultimate",
   "url": "https://www.wikidata.org/wiki/Q113679458",
   "reads": true,
   "writes": false
  },
  {
   "name": "Photo Suite II SE",
   "url": "https://www.wikidata.org/wiki/Q116319408",
   "reads": true,
   "writes": false
  },
  {
   "name": "PhotoSuite III SE",
   "url": "https://www.wikidata.org/wiki/Q111416514",
   "reads": true,
   "writes": false
  },
  {
   "name": "PhotoWorks 2.41",
   "url": "https://www.wikidata.org/wiki/Q116924176",
   "reads": true,
   "writes": false
  },
  {
   "name": "Riptide Photo Studio",
   "url": "https://www.wikidata.org/wiki/Q116949403",
   "reads": true,
   "writes": true
  },
  {
   "name": "Snagit 8",
   "url": "https://www.wikidata.org/wiki/Q119488269",
   "reads": true,
   "writes": false
  },
  {
   "name": "VideoStudio X7",
   "url": "https://www.wikidata.org/wiki/Q113644652",
   "reads": true,
   "writes": false
  },
  {
   "name": "Corel Ventura",
   "url": "http://www.corel.com/servlet/ContentServer/us/en/Product/1152105061811",
   "reads": true,
   "writes": false,
   "via": "ventura-publisher"
  }
 ],
 "projects": [
  {
   "name": "File Formats Wiki",
   "url": "http://fileformats.archiveteam.org/wiki/GEM_Raster",
   "kind": "wiki"
  },
  {
   "name": "PRONOM x-fmt/159",
   "url": "https://www.nationalarchives.gov.uk/PRONOM/x-fmt/159",
   "kind": "format-doc"
  },
  {
   "name": "Wikidata Q28206162",
   "url": "https://www.wikidata.org/wiki/Q28206162",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "ffw",
   "pronom",
   "wikidata"
  ]
 },
 "updated": "2026-10-24",
 "aliases": [],
 "structure": [],
 "parsers": [],
 "conversions": [],
 "samples": [],
 "claims": [],
 "verification": [],
 "family": "ventura-publisher"
}