Robust gray-scale logo watermarking in wavelet domain

被引:23
作者
Bhatnagar, Gaurav [1 ]
Wu, Q. M. Jonathan [1 ]
Raman, Balasubramanian [2 ]
机构
[1] Univ Windsor, Dept Elect & Comp Engn, Windsor, ON N9B 3P4, Canada
[2] Indian Inst Technol Roorkee, Dept Math, Roorkee 247667, Uttar Pradesh, India
基金
加拿大自然科学与工程研究理事会;
关键词
IMAGE WATERMARKING; DIGITAL IMAGE; DWT; DECOMPOSITION; TRANSFORM; ALGORITHM;
D O I
10.1016/j.compeleceng.2012.02.002
中图分类号
TP3 [计算技术、计算机技术];
学科分类号
0812 ;
摘要
In this paper, a robust logo watermarking scheme based on image fusion is proposed. Unlike existing watermarking schemes, the used watermark is a gray scale logo instead of randomly generated Gaussian noise type watermark. The core idea of the proposed scheme is to decompose an image into frequency sub-bands using wavelet transform followed by the embedding in selected blocks of sub-bands obtained by ZIG-ZAG sequence. Block selection is done by taking variance of the blocks into consideration. The experimental results show better visual imperceptibility and resiliency of the proposed scheme against intentional or un-intentional variety of attacks and superiority is carried out by comparison made by us with the existing schemes. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1164 / 1176
页数:13
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