|
Graphic Blogs
Graphic Design
Blogs
web Design Blogs
Program
Specific Blgos
Logo Design Blogs
Graphic Forums
Graphic Design
Forums
Web Design Forums
CSS Design Forums
Graphic Design Help
Graphic Tutorials
Graphic Help
Graphic Articles
Graphic Software
Graphic Software
Graphic Design Resources
Graphic Conferences
Graphic Design Podcasts
Graphic Design RSS Feeds
Graphic Associations
Graphic Wikis
Logo Design
Premade Logos
History of Logos
Fonts
Graphic Formats
Graphic Formats
PNG
GIF
JPG
TIF
BMP
|
GIF Graphic Formats
|
GIF
The Graphics Interchange Format (GIF) is a bitmap image format
that was introduced by CompuServe in 1987 and has since come
into widespread usage on the World Wide Web due to its wide
support and portability.
The format supports up to 8 bits per pixel, allowing a single
image to reference a palette of up to 256 distinct colors
chosen from the 24-bit RGB color space. It also supports animations
and allows a separate palette of 256 colors for each frame.
The color limitation makes the GIF format unsuitable for reproducing
color photographs and other images with continuous color,
but it is 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. This compression technique
was patented in 1985. Controversy over the licensing agreement
between the patent holder, Unisys, and CompuServe in 1994
inspired the development of the Portable Network Graphics
(PNG) standard; since then all the relevant patents have expired.
|
|
|
