GIF stands for Graphics Interchange Format. It is an extension widely used in graphics software like Photoshop, CorelDRAW etc. GIF files are used on the internet for animation and still images.
GIF extension was developed in 1987 by CompuServe in the USA. It is basically used to develop an independent image format.
It uses the Lempel-Ziv-Welch (LZW) algorithm to reduce the file size without looking quality of the image.
GIF images use 8-bit format which supports 256 colours. These images are very famous and it is used on the internet.
GIF is palette-based
the colours used in an image (a frame) in the file have their RGB values defined in a palette table that can hold up to 256 entries, and the data for the image refer to the colours by their indices (0–255) in the palette table. The colour definitions in the palette can be drawn from a colour space of millions of shades (224 shades, 8 bits for each primary), but the maximum number of colours a frame can use is 256. This limitation seemed reasonable when GIF was developed because few people could afford the hardware to display more colours simultaneously. Simple graphics, line drawings, cartoons, and grey-scale photographs typically need fewer than 256 colours.
Source : https://en.wikipedia.org/wiki/GIF
GIF file versions
Still, it has only two versions, first was introduced in 1987 know as GIF87a and second was developed in 1989 and its name is GIF89a.
Where we can use GIF
- We can use a GIF file in small animations and low-resolution clips.
- It can be used in games.
- It uses a transparent background so we can use it in logos and website backgrounds.
Hope that you understand the full form of GIF and its usages. If you are learning any graphic design software so don’t forget to use GIF images in your tool.
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