Patent ID: 7664337
Filing Date: 2010-02-16
Classification: G06T

Abstract:
1. A method for providing film grain to a digital image frame, comprising: receiving a pixel of an incoming video data stream that is associated with the digital image frame; generating a mask of noise values independent of the incoming video data stream that represent a two dimensional block of film grain using a high pass filter, wherein the two dimensional block of film grain is smaller than the digital image frame; mapping a horizontal position and a vertical position of the pixel within the digital image frame to an address of the mask of noise values; selecting an entry from the mask of noise values to corresponding to the address; scaling the entry using a scaling factor to produce a scaled entry; rounding the scaled entry to produce a rounded scaled entry; and combining the rounded scaled entry with the received pixel whereby film grain is added to the digital image frame to produce a grained digital image frame.