Features of PNG

The most obvious difference is that the PNG format can be saved as a transparent background image, JPEG is not, JPEG is a lossy compressed image format. PNG can be converted to JPEG, but transparent pixels will become white, and the image information will be lost in part. Here is an introduction to 2 formats

JPEG is an abbreviation for the Joint Photographic Experts Group (joint Image Expert Group), and the file suffix is named ". JPG "or". JPEG ", is the most commonly used image file format, developed by a software development consortium, is a lossy compression format, the image can be compressed in a small storage space, the image of repetitive or unimportant data will be lost, it is easy to cause damage to the image data.

PNG is an image file storage format that was developed in the mid 1990s to attempt to replace GIF and TIFF file formats with "attempts", while adding features not available in the GIF file format. The streaming web graphics format (Portable Network Graphic format,png) is named after the unofficial "PNG's not GIF", which is a bitmap (bitmap file) storage format that reads "Ping". When PNG is used to store grayscale images, the depth of the grayscale image can be as much as 16 bits, and when the color image is stored, the depth of the color image can be as many as 48 bits, and the alpha channel data of up to 16 bits can also be stored. PNG uses a lossless data compression algorithm derived from LZ77.

Features of PNG