http://dx.doi.org/10.1109/TIP.2011.2150233">
 

Document Type

Journal Article

Department/Unit

Department of Mathematics

Title

Efficient reversible watermarking based on adaptive prediction-error expansion and pixel selection

Language

English

Abstract

Prediction-error expansion (PEE) is an important technique of reversible watermarking which can embed large payloads into digital images with low distortion. In this paper, the PEE technique is further investigated and an efficient reversible watermarking scheme is proposed, by incorporating in PEE two new strategies, namely, adaptive embedding and pixel selection. Unlike conventional PEE which embeds data uniformly, we propose to adaptively embed 1 or 2 bits into expandable pixel according to the local complexity. This avoids expanding pixels with large prediction-errors, and thus, it reduces embedding impact by decreasing the maximum modification to pixel values. Meanwhile, adaptive PEE allows very large payload in a single embedding pass, and it improves the capacity limit of conventional PEE. We also propose to select pixels of smooth area for data embedding and leave rough pixels unchanged. In this way, compared with conventional PEE, a more sharply distributed prediction-error histogram is obtained and a better visual quality of watermarked image is observed. With these improvements, our method outperforms conventional PEE. Its superiority over other state-of-the-art methods is also demonstrated experimentally. © 2006 IEEE.

Keywords

Adaptive embedding, Pixel selection, Prediction-error expansion (PEE), Reversible watermarking

Publication Date

2011

Source Publication Title

IEEE Transactions on Image Processing

Volume

20

Issue

12

Start Page

3524

End Page

3533

Publisher

Institute of Electrical and Electronics Engineers

ISSN (print)

10577149

ISSN (electronic)

19410042

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