Image analysis – Image enhancement or restoration – Artifact removal or suppression
Patent
1995-04-14
1998-11-03
Bost, Dwayne
Image analysis
Image enhancement or restoration
Artifact removal or suppression
358462, G06K 940
Patent
active
058321365
ABSTRACT:
Noise that is hard for human vision to perceive and corresponds to the kind of an original document is superimposed on an input image signal by an amount corresponding to the kind of the original document. More specifically, a noise selection circuit selects a spatial frequency characteristic and an amplification value table that conform to the kind of an original document. Based on the selected characteristic and table, a noise amount calculation circuit calculates a noise amount corresponding to the image signal. A noise superimposing circuit superimposes the noise thus generated on the image signal.
REFERENCES:
patent: 5008752 (1991-04-01), Van Nostrand
patent: 5557429 (1996-09-01), Hirose
Sei-ichi Taguchi and Satoru Honjo, "Quality of Digital Images," The Fifth International Congress on Advances in Non-Impact Printing Technologies, Nov. 12-17, 1989, pp. 383-389.
Yoshitsugu Hirose, "Perceptual Characteristics of Image Noise in Color Hardcopy Images UDC 621.397:778:1:535.6," 1993.
Sei-ichi Taguchi & Satoru Honjo, "Quality of Digital Images," The Fifth International Congress on Advances in Non-Impact Printing Technology, Nov. 12-17, 1989, pp. 383-389.
Bost Dwayne
Fuji 'Xerox Co., Ltd.
Johnson Brian L.
LandOfFree
Image signal processing apparatus with noise superimposition does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image signal processing apparatus with noise superimposition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image signal processing apparatus with noise superimposition will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-699449