JPEG is a lossy compression format developed by the Joint Photographic Experts Group in 1986. During image compression, JPEG compares every 8 by 8 blocks of pixels that make up the images to a linear combination of 64 standard patterns. Thereafter, it establishes the weight of each of these 64 patterns that contribute to 8 by 8 blocks of pixels. Some of the data are lost in the process thus smaller file size. The desired trade-off between file sizes and visual quality can be achieved by adjusting the degree of compression.

JPEG format is widely applied in various digital cameras and scanning devices such as book2net scanners. Images saved in JPEG are suitable for editing thanks to high resolution and low compression. Despite the advantages, JPEG images are saved in one layer and there isn’t an opportunity to redo them.