A DWT ordering Scheme for Hiding Data in Images using Pixel Value Difference

被引：5

作者：

Al-Asmari, Awad Kh. ^{[1
]}

Salama, Ahmed ^{[1
]}

Iliyasu, Abdullah M. ^{[1
]}

Al-Qodah, Mohammed A. ^{[1
]}

机构：

[1] Salman bin Abdul Aziz Univ, Al Karj, Saudi Arabia

来源：

PROCEEDINGS OF THE 2012 EIGHTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL INTELLIGENCE AND SECURITY (CIS 2012) | 2012年

关键词：

image processing; watermarking; discrete wavelet transform (DWT); watermark extraction; DWT ordering; Pixel Value Difference (PVD);

D O I：

10.1109/CIS.2012.130

中图分类号：

TP18 [人工智能理论];

学科分类号：

081104 ; 0812 ; 0835 ; 1405 ;

摘要：

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 NxN-sized watermark stream is hidden in the 8 highest ranked sub-bands. Using the proposal, a 256x256 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.

引用

页码：553 / 557

页数：5

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