TH79865B - Method of simulating film grain based on pre-calculated conversion coefficient. - Google Patents

Abstract

The simulation of film pellets inside the receiver (11) occurs by first-order acquisition, which at least one Pre-calculated block of transformed coefficients. The block of the converted coefficient that was It is pre-computed through a filter that responds to the frequency range, which is characterized by the desired pattern of the film grain. In practice, the frequency range is within the series of cut-off frequencies fHL, fVL, fHH and fVH of the filter circuit in two dimensions. Which has the characteristics of the desired film grain form, after which the filtered set of coefficients undergoes an inverse transformation to obtain a film grain form

Claims (2)

1. A method for creating a film block. It consists of the procedure of (a) pre-computed block acquisition of the converted coefficient (b) frequency filtering. Transformed coefficients responding to the frequency range where the characteristics Desired form of film grain and (c) inverse transform action on frequency-filtered transformed coefficient. 2. Methods in accordance with claim 1, where the process of obtaining a blocked block. Preliminary calculations of the transformed coefficients continue to another step of readability.