Glossary

This part briefly explains the concepts behind the library. The rest of documentation will refer to this page as a knowledge base.

JPEG and DCT

JPEG is a lossy image format. Because of its popularity, it is a good target for steganography, typically done on top of DCT coefficients. To read coefficients from JPEG and write them back, we encourage you to use our other project, jpeglib. In its glossary, you can find a lot of details on JPEG specifically.