An enhannced technique for image steganography using 2-levels PVD

Authors:
Kamal Jambi;Salim Alnahdi
Affiliations:
King Abdulaziz University, Jeddah, Saudi Arabia;King Abdulaziz University, Jeddah, Saudi Arabia
Venue:
SIP '07 Proceedings of the Ninth IASTED International Conference on Signal and Image Processing
Year:
2007

Citing 4
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Abstract

Pixel-Value Differencing (PVD) for information hiding is proposed by Wu and Tsai. It is capable to hide large amount of data by using adaptive scheme. This paper presents a modified scheme based on Wu-Tsai's algorithm. The proposed method exploits the ability of performing embedding process twice for every pair of pixels. The sum and difference of block pixels facilitates restoring of the first stego-image. Results show an improvement in stego-image capacity by more than 30% compared with the original scheme. Comparing Stegoimages after using both schemes illustrates that the proposed method can hide much more data information and maintain good visual quality.