A semi-blind digital watermarking scheme based on the triplet of significant wavelet coefficients

被引：2
作者：
Chu, Hyung-Suk [1 ]
Batgerel, Ariunzaya [2 ]
An, Chong-Koo [2 ]
机构：
[1] Powelltechwin, Inc., Ulsan
[2] School of Electrical Engineering, University of Ulsan, Ulsan
来源：
Journal of Electrical Engineering and Technology | 2009年 / 4卷 / 04期
关键词：
Copyright protection; Digital image watermarking; Quad-tree algorithm; Semi-blind watermarking;
D O I：
10.5370/JEET.2009.4.4.552
中图分类号：
学科分类号：
摘要：
We proposed a semi-blind digital image watermarking technique for copyright protection. The proposed algorithm embedded a binary sequence watermark into significant wavelet coefficients by using a quantization method. The main idea of the quantization method was to quantize a middle coefficient of the triplet of a significant wavelet coefficient according to the watermark's value. Unlike an existing algorithm, which used a random location table to find a coefficient in which the watermark bit will be embedded: the proposed algorithm used quad-tree decomposition to find a significant wavelet coefficient for embedding. For watermark detection, an original host image was not required. Thanks to the usage of significant wavelet coefficients, the proposed algorithm improved the correlation value, up to 0.43, in comparison with the existing algorithm.
引用
收藏
页码：552 / 558
页数：6
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