Each pixel may consist of one or more bit s of information, representing the brightness of the image at that point and possibly including colour information encoded as RGB triples. See also image formats , image processing . Graphics Interchange Format and GIF are service marks of CompuServe Incorporated. It followed from a 1994 legal action by Unisys against CIS for violating Unisys's LZW software patent . A file format used for still-image bitmaps , stored in tagged fields.
Application programs can use the tags to accept or ignore fields, depending on their capabilities.
The original name of the committee that designed the standard image compression algorithm . It does not work so well on non-realistic images, such as cartoons or line drawings. Standards for compressing those types of images are being worked on by other committees, named JBIG and MPEG . An extensible file format for the lossless , portable , well-compressed storage of raster images . PNG provides a patent-free replacement for GIF and can also replace many common uses of TIFF .