Reversible watermarking with adaptive embedding threshold matrix

Document Type

Article

Publication Date

9-30-2016

Abstract

In this paper, a new reversible watermarking algorithm with adaptive embedding threshold matrix is proposed. Firstly, to avoid the overflow and underflow, two flexible thresholds, TL and TR, are applied to preprocess the image histogram with least histogram shift cost. Secondly, for achieving an optimal or near optimal tradeoff between the embedding capacity and imperceptibility, the embedding threshold matrix, composed of the embedding thresholds of all blocks, is determined adaptively by the combination between the composite chaos and the average energy of Integer Wavelet Transform (IWT) block. As a non-liner system with good randomness, the composite chaos is suitable to search the optimal embedding thresholds. Meanwhile, the average energy of IWT block is calculated to adjust the block embedding capacity, and more data are embedded into those IWT blocks with larger average energy. The experimental results demonstrate that compared with the state-of-the-art reversible watermarking schemes, the proposed scheme has better performance for the tradeoff between the embedding capacity and imperceptibility.

Identifier

84989332111 (Scopus)

Publication Title

Ksii Transactions on Internet and Information Systems

External Full Text Location

https://doi.org/10.3837/tiis.2016.09.031

e-ISSN

22881468

ISSN

19767277

First Page

4603

Last Page

4624

Issue

9

Volume

10

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