Image analysis – Image compression or coding – Lossless compression
Reexamination Certificate
2007-05-01
2007-05-01
Alavi, Amir (Department: 2624)
Image analysis
Image compression or coding
Lossless compression
Reexamination Certificate
active
10355056
ABSTRACT:
Provided are an image compression method and apparatus for differentially encoding digital image signals based on a Joint Photographic Experts Group (JPEG) image compression standard. RGB image signals are converted to luminance and chrominance data. Pixels of converted chrominance components are compared, difference values between the compared pixels are obtained, and representative pixel values are determined by comparing the obtained difference value and an allowable error. The representative pixel values are encoded. A data compression ratio can be improved by discrete-cosine-transforming only portions of an image having different colors from a background color.
REFERENCES:
patent: 3942154 (1976-03-01), Akami et al.
patent: 5164819 (1992-11-01), Music
patent: 5333212 (1994-07-01), Ligtenberg
patent: 5383037 (1995-01-01), Kimura et al.
patent: 5754697 (1998-05-01), Fu et al.
patent: 5903671 (1999-05-01), Toda
patent: 6628411 (2003-09-01), Miller et al.
patent: 2002/0149679 (2002-10-01), Deangelis et al.
patent: 63-76685 (1988-04-01), None
patent: 8-23550 (1996-01-01), None
patent: 9-327021 (1997-12-01), None
patent: 1999-013733 (1999-02-01), None
Alavi Amir
Samsung Electronics Co,. Ltd.
LandOfFree
Method and apparatus for differentially compressing images does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for differentially compressing images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for differentially compressing images will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3780052