GIF Full Form: What Does GIF Mean?

GIF full form: What does GIF mean?

Do you know the full form of GIF (or GIF full form) and what does GIF mean?

Well, in this post I'm going to tell you the full form of GIF and what is the meaning of GIF.

So first of all, let us know what is the full form of GIF.

The full form of GIF is Graphics Interchange Format.


What does GIF mean?

GIF stands for Graphics Interchange Format, which is a bitmap image format or a file in which images are animated. Simply put, GIF is an animated image without sound. It has been developed by American computer scientist Steve Wilhite of CompuServe.

GIFs are commonly used as memes, to depict a feeling or reaction. It is pronounced JIF.


How do GIF works? (GIF compression explained)

GIF is a popular image format, used for short animation and low-resolution movie clips. It is a lossless format for bitmap images, where each pixel of the image is represented by its color.

To reduce the file size of a GIF image, the maximum number of colors allowed is 256. The colors used in a particular GIF image are stored as a color palette in a pair of their index and RGB value.

Palettes can contain transparent colors, which allows transparency in a GIF image. Having only 256 colors, choosing the right colors for the color palette is important because we want the new image to be as similar to the original image as possible.

It is obtained by combining quantization and dithering. Quantization reduces the number of distinct colors used in an image by putting similar colors into blocks and selecting their average color. Dithering applies noise to randomize the quantization output to prevent color banding.

The next step in GIF compression is to encode the image using the Lempel–Ziv–Welch algorithm. The LZW algorithm scans the image horizontally from the top left and replaces the pair of color indices of the pixels and the occurrence of pixels with the same color with the number of pixels.

So what about animation?

GIFs can contain multiple frames layered on top of each other, creating a video clip. Each frame can have its color palette, but they can share a global color palette if file size saving is a priority.

It allows rewriting only a portion of a defined pixel into a uniform rectangle instead of the entire image.

Hope you have learned about GIF including GIF full form.

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