JPEG (Joint Photographic Experts Group) is the product of JPEG standard, which is formulated by the International Organization for Standardization (ISO) and is the compression standard of continuous-tone still images. JPEG format is the most commonly used image file format, and the suffix is. Jpg or. jpeg。
JPEG formats can be divided into standard JPEG, progressive JPEG and JPEG2000. ?
1. standard JPEG format; This type can only display images from top to bottom in turn when downloading web pages, and the whole image can only be seen after all image data is downloaded. ?
2. Progressive JPEG；; When downloading a web page, this type first presents the rough appearance of the image, and then slowly presents the complete content, and the document saved in progressive JPG format is smaller than that saved in standard JPG format, so if you want to use images on the web page, you can use this format more.
3.JPEG2000 is a new generation of image compression method with higher compression quality, which can improve the mosaic phenomenon and position disorder caused by signal instability in wireless transmission and improve the transmission quality.