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Top Document: Graphics File Formats FAQ (Part 3 of 4): Where to Get File Format Specifications
Previous Document: GFO - SGI Radiosity
Next Document: GKS - Graphics Kernel System
GIF - Graphics Interchange Format
Type: Bitmap
Extension: GIF
Version: 87a, 89a
Compression: LZW
Color Depth: 8-bit
Maintainer: Compuserve
Specification: ftp://ftp.ncsa.uiuc.edu:/misc/file.formats/graphics.formats/
ftp://ftp.ncsa.uiuc.edu:/misc/file.formats/graphics.formats/
GIF is a data stream-oriented file format used to define the transmission
protocol of LZW-encoded bitmap data. GIF images may be up to eight bits
(256 colors) in depth and are always compressed. Despite the fact that GIF
supports only 8-bits worth of colors, and the multimedia extensions
introduced in the 89a release have not been widely utilized, GIF still
remains a popular choice for storing lower resolution image data.
The GIF89a specification is available via many BBSs and on-line information
services. You may also obtain the specification directly from CompuServe:
CompuServe Incorporated
Attn: Graphics Technology Department
5000 Arlington Center Boulevard
Columbus, OH 43220
Voice: 614.457.8600, 800.848.8199
FTP: ftp://ftp.compuserve.com/
WWW: http://www.compuserve.com/
Note: Any software created or modified after 01 January 1995 that supports
the capability of reading and/or writing GIF files must obtain a patent
license agreement from Unisys Corporation. See Part I of the FAQ for more
details on the Unisys GIF-LZW license agreements.
Here are a few links specializing in GIF89a animations:
http://www.fastlane.net/~samiel/anim.shtml
GIF Animation Secrets
http://member.aol.com/royalef/gifanim.htm
Royal Frazier's GIF Animation on the WWW
http://www.peritas.com/~abw/multigif.html
MultiGIF GIF89a Animation Utility
http://www.iis.ee.ethz.ch/~kiwi/GIFMerge/
GIFMerge Utility
Top Document: Graphics File Formats FAQ (Part 3 of 4): Where to Get File Format Specifications
Previous Document: GFO - SGI Radiosity
Next Document: GKS - Graphics Kernel System
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Send corrections/additions to the FAQ Maintainer:
jdm@ora.com (James D. Murray)
Last Update August 21 2008 @ 00:12 AM