JPEG (Joint Photographic Experts Group) is a format to store images. This format was created by C-Cube Microsystems as effective method to store high-color-depth images. For example, scanned photos with smooth variations of tone and color. Algorithm of compression with losing information is used in the JPEG format. This means that some visual quality is lost in the process and cannot be restored. It is necessary to get the highest coefficient of compression. Unpacked JPEG images are rarely have the same quality as original image but differences are insignificant. Compression ratio is usually set in conventional units, for example from 1 to 100. 100 is the best quality and 1 is the worst quality. The better quality the bigger file size.