NDLI: The image authenticity confirmation by modifying spectral components

Content Provider	IEEE Xplore Digital Library
Author	Rakocevic, I. Reljin, B. Reljin, I.
Copyright Year	1998
Description	Author affiliation: TMS Project Co., Belgrade, Yugoslavia (Rakocevic, I.)
Abstract	The method for providing digital image authenticity, using the 'digital watermark' technique, is described. The protection method is based on the modification of the spectral coefficients in the discrete cosine transform (DCT) domain. In order to preserve both the watermark invisibility and its resistance to compression procedure (as JPEG) the low-frequency DCT coefficients of the watermark are inserted into the middle-frequency positions of the original image in every 8/spl times/8 DCT block, satisfying the zig-zag ordering. Our technique also ensures robustness to various image processing algorithms such as common geometric distortion, brightness and contrast modification, JPEG compression, as illustrated on several examples. The protected image and the watermark signal are the same size, providing not only the authenticity confirmation but also some kind of the secure transfer of another image using the same image area.
Starting Page	494
Ending Page	497
File Size	698732
Page Count	4
File Format	PDF
ISBN	078036290X
DOI	10.1109/MELCON.2000.879978
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-05-29
Publisher Place	Cyprus
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Watermarking Discrete cosine transforms Protection Image coding Transform coding Cryptography Electronic mail Brightness Image storage Digital images
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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