METHOD OF EASY IMITATION OF FILM GRANULARITY Russian patent published in 2009 - IPC G06T5/00 H04N5/253 H04N7/26 

FIELD: physics; image processing.

SUBSTANCE: invention relates to methods of imitating film granularity in an image. The said result is achieved due to that, film granularity in a video image is imitated by creating a block first i.e. a matrix of transformed coefficients for a set of cutoff frequencies f_HL f_VL, f_HH and f_VH, related to the desired granularity structure. Cutoff frequencies f_HL f_VL, f_HH and f_VH represent cutoff frequency, in two measurements, of a filter which sets characteristics of the desired film granularity structure. The block of transformed coefficients undergoes inverse transformation, obtaining a sample of film granularity with accuracy of up to a bit, and the said sample is scaled in order to mix with a video signal for imitating film granularity in that signal.

EFFECT: easier imitation of film granularity in an image.

20 cl, 4 dwg