NDLI: Robustness Evaluation of Perceptual Watermarks

Content Provider	IEEE Xplore Digital Library
Author	Nafornita, C.
Copyright Year	2007
Description	Author affiliation: Politehnica Univ. of Timisoara, Timisoara (Nafornita, C.)
Abstract	In a watermarking system, robustness evaluation should be made if invisibility criteria are satisfied. For this purpose, we propose to measure the perceptual impact of a watermark on the image using the well known peak signal-to-noise ratio (PSNR) and additionally a spatial masking model that indicates "bad" pixels between the original and watermarked images. Two perceptual watermarks using pixel-wise masking in the wavelet domain are being tested, limiting the watermark strength such that the PSNR is 35 dB and in average the percentage of affected pixels is less than 25%. Extensive tests were made on several watermarked images and for different types of attacks (JPEG compression, median filtering, resizing, cropping and gamma correction) in order to see the effect of these attacks on the detector results. Simulations show some limitations of these techniques under the invisibility constraint.
Starting Page	1
Ending Page	4
File Size	2525455
Page Count	4
File Format	PDF
ISBN	1424409683
DOI	10.1109/ISSCS.2007.4292744
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-07-13
Publisher Place	Romania
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	PSNR Wavelet domain Image coding Filtering Transform coding Watermarking Robustness Gamma ray detection Pixel Testing
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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