NDLI: A DWT Ordering Scheme for Hiding Data in Images Using Pixel Value Difference

Content Provider	IEEE Xplore Digital Library
Author	Al-Asmari, A.K. Salama, A. Iliyasu, A.M. Al-Qodah, M.A.
Copyright Year	2012
Abstract	A scheme is proposed to hide data in images based on a prioritised ordering of the content of the host image. The embedding process uses the watermark strength to determine the ordering of the 16 regions resulting from the second level wavelet transform DWT decomposed content of the host image. The DWT decomposed sub-bands of the cover image were analysed, transformed using the Pixel Value Difference (PVD), and then ranked in terms of their ability to withstand changes that do not imperil the visual quality (PSNR) of the watermarked image depending on which an N×N-sized watermark stream is hidden in the 8 highest ranked sub-bands. Using the proposal, a 256×256 Lena image had the capacity to accommodate up to 96800 bits of a watermark logo while still maintaining an appreciable visual quality manifested by a PSNR value of 33.66 dB.
Starting Page	553
Ending Page	557
File Size	586754
Page Count	5
File Format	PDF
ISBN	9781467347259
DOI	10.1109/CIS.2012.130
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-11-17
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	image processing Visualization PSNR Watermarking discrete wavelet transform (DWT) Discrete wavelet transforms Data mining watermark extraction Pixel Value Difference (PVD) watermarking DWT ordering Streaming media Robustness
Content Type	Text
Resource Type	Article

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