NDLI: Hierarchical watermarking depending on local constraints

Content Provider	IEEE Xplore Digital Library
Author	Coltman, C.D. Bors, A.G.
Copyright Year	2001
Description	Author affiliation: Dept. of Comput. Sci., York Univ., UK (Coltman, C.D.)
Abstract	We propose a new watermarking technique where the watermark is embedded according to two keys. The first key is used to embed a code bit in a block of pixels. The second is used to generate the whole sequence of code bits The watermark is embedded in spatial domain by adding or subtracting a random digital pattern to the given image signal. The embedding depth level depends on the spectral density distribution of the DCT coefficients and on the JPEG quantization table. The label consists of a set of bits which are embedded locally in a rectangular set of blocks and it is repeated over the entire image. After detecting individual bits, the retrieved label is verified by performing a XOR operation to the watermark code.
Sponsorship	IEEE Signal Process. Soc
Starting Page	1011
Ending Page	1014
File Size	459996
Page Count	4
File Format	PDF
ISBN	0780367251
DOI	10.1109/ICIP.2001.958297
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-10-07
Publisher Place	Greece
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Watermarking Robustness Testing Discrete cosine transforms Frequency domain analysis Computer science Quantization Copyright protection Image coding Filtering
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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