14 Facts About Animated GIF


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

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CompuServe encouraged the adoption of Animated GIF by providing downloadable conversion utilities for many computers.

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Animated GIF was one of the first two image formats commonly used on Web sites, the other being the black-and-white XBM.

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Smucker Company, the owners of the Jif brand, partnered with the animated image database and search engine Giphy to release a limited-edition "Jif vs GIF" jar of peanut butter that had a label humorously declaring the soft-g pronunciation to refer exclusively to the peanut butter, and GIF to be exclusively pronounced with the hard-g pronunciation.

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Conceptually, a Animated GIF file describes a fixed-sized graphical area populated with zero or more "images".

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Related searches

CompuServe Giphy Unisys

Many Animated GIF files have a single image that fills the entire logical screen.

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Animated GIF files start with a fixed-length header giving the version, followed by a fixed-length Logical Screen Descriptor giving the pixel dimensions and other characteristics of the logical screen.

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Additionally, not all Animated GIF rendering programs handle tiled or layered images correctly.

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Uncompressed Animated GIF can be a useful intermediate format for a graphics programmer because individual pixels are accessible for reading or painting.

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The Animated GIF standard allows such extra CLEAR codes to be inserted in the image data at any time.

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Each frame in an animation Animated GIF is introduced by its own GCE specifying the time delay to wait after the frame is drawn.

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Unisys became aware that the version of Animated GIF used the LZW compression technique and entered into licensing negotiations with CompuServe in January 1993.

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Unisys stated that they expected all major commercial on-line information services companies employing the LZW patent to license the technology from Unisys at a reasonable rate, but that they would not require licensing, or fees to be paid, for non-commercial, non-profit Animated GIF-based applications, including those for use on the on-line services.

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Complete support for Animated GIF is complicated chiefly by the complex canvas structure it allows, though this is what enables the compact animation features.

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