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Editor to share with you what gif refers to the file format, I believe that most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's go to understand it!

Gif, which means "graphics interchange format" in Chinese, is a commonly used dynamic image format. GIF is divided into static GIF and animation GIF, the extension is ".gif", is a compressed bitmap format, support transparent background images, suitable for a variety of operating systems, "body" is very small, many small animations on the Internet are in GIF format.

The full name of GIF is Graphics Interchange Format, which can be translated into graphics interchange format. It is used to display indexed color images in Hypertext markup language (Hypertext Markup Language). It is widely used on the Internet and other online service systems. GIF is a common image file format standard, and the copyright is owned by Compu Serve.

Most of the common small animations on the Internet are in GIF format, also known as frame-by-frame animation, which is a combination of several pictures (or a single frame). It uses lossless compression technology, as long as the image is not more than 256 colors, it can not only reduce the file size, but also maintain the quality of the image. GIF is divided into static GIF and animation GIF, extension .gif, is a compressed bitmap format, support transparent background images, suitable for a variety of operating systems, "body" is very small, many small animations on the Internet are in GIF format.

GIF is a bitmap. The general principle of a bitmap is that a picture is made up of many pixels, each of which is assigned a color, and these pixels are combined to form a picture. GIF uses the Lempel-Zev-Welch (LZW) compression algorithm, which supports up to 256 colors. Because of this feature, GIF is more suitable for pictures with fewer colors, such as cartoon shapes, company logos and so on. If there is a need to use true color, then the expressive power of GIF is limited. GIF usually comes with a color palette that stores all the colors you need. In the application of Web, the file size of the image will obviously affect the download speed, so we can optimize the color palette according to the characteristics of GIF with color palette to reduce the number of colors used in the image (some colors that are not used in the image can be removed) without affecting the quality of the picture.

The biggest difference between GIF format and other image formats is that it is designed entirely as a common standard. Due to the popularity of Compu Serve networks, many platforms support GIF format. Compu Serve promotes GIF through free format manuals, but requires software that uses the GIF file format to include a description of its copyright information.

Characteristics

Image files in GIF format have the following characteristics:

(1) the extension of the GIF format image file is ".gif".

(2) the performance is the best for grayscale images.

(3) there are two versions: GIF87a and GIF89a.

(4) the improved LZW compression algorithm is used to process image data.

(5) palette data can be divided into general palettes and local palettes, and there are different color values.

(6) 24bit color mode is not supported, and a maximum of 256colors are stored.

The above is all the contents of the article "what file format does gif refer to". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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