We give a brief survey of the framework, relevant issues and existing methods
in the field of digital image compression. Accept for section 3 where
additional references are given, we basically follow the exposition of the
field as presented in: Digital Pictures - Representation and Compression Arun.
N. Netravali and Barry G. Haskell Bell Laboratories Murray Hill, New Jersey
Plenum Press, London and New York 1988. All figures that contain page
numberings are taken from the above.