FIELD: physics; image processing.
SUBSTANCE: invention relates to devices for simulating film grains. In order to determine film grain parametres, apparatus for determining film grain receives an input information stream and a filtered information stream from which film grain has been removed. The apparatus for determining film grain parametres gives out a message from these streams, which contains a model identifier for grain simulating, as well as at least one set from several parametres which include correlation parametres, intensity-independant parametres and intensity-dependant parametres used by the identified model. An encoder encodes film grain information for subsequent transmission.
EFFECT: simulation of film grain for mixing with an image after decoding.
26 cl, 3 dwg
