Partial dynamic false contour detection method based on look-up table and device thereof, and image data compensation method using the same

摘要

A method for detecting noise includes determining whether a data value of a candidate pixel in a predetermined region of an image matches a first dynamic false contour (DFC) candidate value, determining whether a data value of at least one pixel adjacent to the candidate pixel matches a second DFC candidate value, and changing the data value of the candidate pixel the prior two determinations. The data value of the candidate pixel may be changed to a value in a lookup table. The first and second DFC candidate values may also be stored in one or more lookup tables.

主权项

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.