公开(公告)号：US07002636B2

公开(公告)日：2006-02-21

申请号：US10332127

申请日：2002-05-09

申请人： Yuichi Ishikawa ,  Mitsuaki Shinba

发明人： Yuichi Ishikawa ,  Mitsuaki Shinba

IPC分类号： H04N5/208

CPC分类号： H04N5/208

摘要： A gray scale correction unit intended to provide a gray scale correction unit for preventing aliasing-like noise generation and gray-scale degradation of a gradation portion adaptively controls a correction value in accordance with the slope of a video signal, detects generation of aliasing-like noise, steepens an edge having a large amplitude without deterioration in the image quality, and improves a spatial frequency of the video signal.