Patent ID: 6906704
Filing Date: 2005-06-14
Classification: H04N

Abstract:
1. A noise elimination method for eliminating a noise signal mixed into a two-dimensional image signal, comprising the steps of: (a) detecting a zigzag signal in which a differential value between signal levels of two pixels which are adjacent to each other along a horizontal pixel direction or along a vertical pixel direction in said two-dimensional image signal alternately takes a positive value and a negative value; (b) determining whether or not said zigzag signal detected in said step (a) forms a stripe pattern; (c) regarding the zigzag signal as a normal image signal when said zigzag signal is determined as forming a stripe pattern in said step (b); (d) regarding the zigzag signal as a noise signal and extracting the same when said zigzag signal is determined as not forming a stripe pattern in said step (b); and (e) filtering said noise signal extracted in said step (d) from said two-dimensional image signal.