Patent ID: 9595218
Date: 2017-03-14
CPC Classifications: G09G

Claim:
1. A method of detecting noise in an image, the method comprising: (a) setting a region to be searched for dynamic false contour (DFC) noise, the region including a candidate pixel and at least one adjacent pixel; (b) determining whether a data value of the candidate pixel matches a DFC candidate value of a first lookup table for candidate pixels, determining (b) including comparing the data value of the candidate pixel with the DFC candidate value of the lookup table for candidate pixels; (c) detecting existence of DFC noise by determining whether a data value of the at least one adjacent pixel matches a DFC candidate value of a second lookup table for adjacent pixels, the determining including comparing the data value of the adjacent pixel with the DFC candidate value of the lookup table for adjacent pixels; and (d) changing the data value of the candidate pixel to a DFC noise-free pixel value when DFC noise is determined to be present in the candidate pixel.