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This article mainly introduces jpg refers to what the file format, the article is very detailed, has a certain reference value, interested friends must read it!

Jpg is an image format file, and jpg generally refers to JPEG format. The English full name of JPEG is Joint Photographic Experts Group, which is the product of JPEG standard, which is formulated by the International Organization for Standardization (ISO) and is a compression standard for continuous-tone still images.

JPEG (full name Joint Photographic Experts Group) is a common image format, and the file dropout is called ".jpg" or ".jpeg". It was developed by the Joint Photography expert Group and named "ISO 10918-1". JPEG is just a common name.

Jpeg, a software development association, is a lossy compression format, which can compress the image in a very small storage space, and the repeated or unimportant data in the image will be lost, so it is easy to cause damage to the image data. In particular, the use of too high compression ratio will significantly reduce the quality of the image restored after the final decompression, the pursuit of high-quality image, should not use too high compression ratio.

At the same time, JPEG is also a very flexible format, with the function of adjusting image quality, allowing this file to be compressed with different compression ratios, for example, we can compress 1.37MB BMP bitmap files to 20.3KB at most.

The extension of JPEG file is its compression technology is very advanced, it uses to remove redundant images and color data, to achieve a very high compression ratio while showing very rich and vivid images, in other words, you can use the least disk space to get better image quality.

Extended data:

There are several compression modes for JPEG:

1. Sequential coding (Sequential Encoding): the image is processed sequentially from left to right and from top to bottom at one time.

two。 Incremental coding (Progressive Encoding): when the image is transmitted for a long time, the image can be fractionally processed to transmit the image from blur to clarity (the effect is similar to the transmission of GIF on the network).

3. Lossless coding (Lossless Encoding)

4. Stepped coding (Hierarchical Encoding): images are compressed at several resolutions so that images with high resolution can be displayed on devices with lower resolution.

The above is all the contents of the article "what file format does jpg refer to". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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