GIF (jĭf, gĭf)
A service mark used for a raster-based color graphics file format, often used on the World Wide Web to store graphics.

* * *

in full Graphics Interchange Format

Standard computer file format for graphic images.

GIF files use data compression to reduce the file size. The original version of the format was developed by CompuServe in 1987. The current version supports animated GIFs (a graphics image that moves). GIF and JPEG are the most commonly used graphics formats on the Internet.

* * *

▪ digital file format
in full  graphics interchange format 

      digital file format devised in 1987 by the Internet service provider CompuServe as a means of reducing the size of images and short animations. Because GIF is a lossless data compression format, meaning that no information is lost in the compression, it quickly became a popular format for transmitting and storing graphic files.

      At the time of its creation, GIF's support of 256 different colours was considered vast, as many computer monitors had the same limit (in 8-bit systems, or 28 colours). The method used to keep file size to a minimum is a compression algorithm commonly referred to as LZW, named after its inventors, Abraham Lempel and Jacob Ziv of Israel and Terry Welch of the United States. LZW was the source of a controversy started by the American Unisys Corporation in 1994, when it was revealed that they owned a patent for LZW and were belatedly seeking royalties from several users. Although the relevant patents expired by 2004, the controversy resulted in the creation of the portable network graphics (PNG) format, an alternative to GIF that offered a wider array of colours and different compression methods. JPEG (joint photographic experts group), a digital file format that supports millions of different colour options, is often used to transmit better-quality images, such as digital photographs, at the cost of greater size. Despite the competition, GIF remains popular.

* * *

Universalium. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • GIF —   [Abk. für Graphics Interchange Format], ein Grafikformat zur Speicherung von Bilddateien; die Erweiterung von GIF Dateien ist ».gif«.   Im Gegensatz zu unkomprimierten Bitmap Bildern werden GIF Dateien mit dem LZW Verfahren (LZ Kodierung)… …   Universal-Lexikon

  • gif — gif; gif·blaar; gif·o·la; man·gif·era; ran·gif·er·ine; spo·ran·gif·er·ous; ter·gif·er·ous; …   English syllables

  • Gif — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. GIF, sigle composé des trois lettres G, I et F, peut vouloir dire : Graphics Interchange Format, un format de données informatique d image numérique …   Wikipédia en Français

  • GIF — [gɪf] noun [uncountable] trademark COMPUTING Graphic Interchange Format a computer file containing images with up to 256 colours. GIF files are used especially on webs, but they are not considered suitable for professional pr …   Financial and business terms

  • GIF — (Graphics Interchange Format) es un formato de imagen utilizado ampliamente en la World Wide Web, tanto para imágenes como para animaciones. El formato fue creado por CompuServe en 1987 para dotar de un formato de imagen a color para sus areas de …   Enciclopedia Universal

  • GIF — GIF, n. [Acronym from Graphics Interchange Format.] (Computers) 1. The Graphics Interchange Format, one of the most popular standardized formats for storing graphic data in binary computer files. The standard has been revised several times, and… …   The Collaborative International Dictionary of English

  • Gif — Gif, conj. [AS. See {If}.] If. [Obs.] [1913 Webster] Note: Gif is the old form of if, and frequently occurs in the earlier English writers. See {If}. [1913 Webster] …   The Collaborative International Dictionary of English

  • GIF™ — 7 [GIF] [ɡɪf] [ɡɪf] noun (computing) the abbreviation for ‘Graphic Interchange Format ’ (a type of computer file that contains images and is used a lot on the Internet) …   Useful english dictionary

  • GIF — [gıf] n technical graphics interchange format a type of computer ↑file that contains images and is used on the Internet …   Dictionary of contemporary English

  • GIF — [ ,dʒi aı ef ] noun uncount COMPUTING Graphic Interchange Format: a type of computer file that contains an image. GIF is also used as part of a file name …   Usage of the words and phrases in modern English

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”