Image analysis – Applications
Reexamination Certificate
2007-12-18
2007-12-18
Ahmed, Samir (Department: 2624)
Image analysis
Applications
C382S232000, C382S240000, C713S176000, C713S179000, C380S051000, C386S349000, C358S003280
Reexamination Certificate
active
10531584
ABSTRACT:
A false alteration detecting method using an electronic watermark method of fragile type by number theoretic transform. A processing section sets parameters P, N, α of number theoretic transform (S101), and reads original image blocks fi,j(x,y) (S103), conducts number theoretic transform of fi,j(x,y) to calculate the number theoretic transform blocks Fi,j(x,y) (S105), determines the position (x′,y′) at which a signature image is to be embedded by using a randomizing function (S107), reads pixel values gi,jof the signature image for embedment from a storage section (S109), determines the embedment value δ of each block from the Fi,j(x′,y′) of the embedment position and gi,j(S111), adds the embedment value δ to the Fi,j(x,y) or subtracts the embedment value δ from the Fi,j(x,y) to determine the number theoretic transform blocks Hi,j(x,y) of the embedded image block (S113), calculates the inverse number theoretic transform of the Hi,j(x,y), determines the embedded image blocks hi,j(x,y), stores them, and outputs them to an output section.
REFERENCES:
patent: 5930369 (1999-07-01), Cox et al.
patent: 6185312 (2001-02-01), Nakamura et al.
patent: 7072522 (2006-07-01), Miyake et al.
patent: 7142689 (2006-11-01), Hayashi et al.
patent: 2002/0191856 (2002-12-01), Umeda et al.
patent: 1 221 816 (2001-12-01), None
patent: 11-355558 (1999-12-01), None
patent: 2000-228632 (2000-08-01), None
patent: 2001-024876 (2001-01-01), None
patent: 2001-148778 (2001-05-01), None
patent: 2002-044429 (2002-02-01), None
patent: 2004-048285 (2004-02-01), None
Paten Abstact of Japan 2002-201703 Jul. 19, 2002.
“A Digital Watermarking Technique for Detecting Alteration on Still Images Using Number Theoretic Transform” Hideaki Tamori, Naofumi Aoki, and Tsuyoshi Yamamoto. Graduate School of Engineering, Hokkaido University.
“Localization and Correction of Digital Image Alteration Using Fragile Watermarks Based on Number Theoretic Transform” Hideaki Tamori, Naofumi Aoki, and Tsuyoshi Yamamoto.
“A Secure Watermarking for Changing Points Detection” Keiichi Iwamura, Junichi Hayashi, Kouichi Sakurai, Hideki Imai Oct. 13, 2001.
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Aug. 2002 A publication of the engineering sciences society.
Proceeding of the 2002 IEICE General Conference, Mar. 27-30, 2002, Waseda University, Tokyo.
Aoki Naofumi
Tamori Hideaki
Yamamoto Tsuyoshi
Ahmed Samir
Bitar Nancy
Japan Science and Technology Agency
Lowe Hauptman & Ham & Berner, LLP
LandOfFree
Unauthorized-alteration detecting method,... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Unauthorized-alteration detecting method,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Unauthorized-alteration detecting method,... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3877098