Cosa (chi) è Graphics Interchange Format - definizione

BITMAP IMAGE FILE FORMAT FAMILY

Gif; .gif; Animated GIF; Animated gif; .GIF; GIF animation; GIF animator; GIFSCII; Interlaced GIF; Animated GIFs; Transparent gif; Transparent GIF; Gif animation; Blinky (image); GIF89a; GIF87a; GIF.; Anigif; .gfa; Graphic interchange format; Graphics interchange format; Graphic Interchange Format; GIF89; GiF; 4,558,302; Progressive GIF; Jraphics; Libungif; Libgif; Giflib; Graphics Interchange Format; Video alternative to GIF; .gifv; Gifv; Video alternative to the Graphics Interchange Format; Video alternative to the GIF; GIFV; GIFs; Scaled GIF; Image/gif

Graphics Interchange Format

<graphics, file format> /gif/, occasionally /jif/ (GIF, GIF 89A) A standard for digitised images compressed with the LZW algorithm, defined in 1987 by CompuServe (CIS). Graphics Interchange Format and GIF are service marks of CompuServe Incorporated. This only affects use of GIF within Compuserve, and pass-through licensing for software to access them, it doesn't affect anyone else's use of GIF. It followed from a 1994 legal action by Unisys against CIS for violating Unisys's LZW software patent. The CompuServe Vice President has stated that "CompuServe is committed to keeping the GIF 89A specification as an open, fully-supported, non-proprietary specification for the entire on-line community including the World-Wide Web". Filename extension: .gif. File format (ftp://peipa.essex.ac.uk/ipa/info/file-formats). {Graphics Interchange Formatmayer/lzw_gif/gif89a.html">GIF89a specification (http://asterix.seas.upenn.edu/Graphics Interchange Formatmayer/lzw_gif/gif89a.html)}. See also progressive coding, animated GIF. (2000-09-12)

Gif

·conj If.

GIF89a

animated GIF

Wikipedia

GIF

The Graphics Interchange Format (GIF; GHIF or JIF, see pronunciation) is a bitmap image format that was developed by a team at the online services provider CompuServe led by American computer scientist Steve Wilhite and released on June 15, 1987. It is in widespread usage on the World Wide Web due to its wide support and portability between applications and operating systems.

The format supports up to 8 bits per pixel for each image, allowing a single image to reference its own palette of up to 256 different colors chosen from the 24-bit RGB color space. It also supports animations and allows a separate palette of up to 256 colors for each frame. These palette limitations make GIF less suitable for reproducing color photographs and other images with color gradients but well-suited for simpler images such as graphics or logos with solid areas of color.

GIF images are compressed using the Lempel–Ziv–Welch (LZW) lossless data compression technique to reduce the file size without degrading the visual quality.

https://en.wikipedia.org/wiki/GIF