A maximum a-posteriori identification criterion for wavelet domain watermarking

被引：3
作者：
Ng, Tek Ming [1 ,2 ]
Garg, Hari Krishna [1 ]
机构：
[1] Faculty of Engineering, Department of Electrical and Computer Engineering, National University of Singapore, 117576, Singapore
[2] Republic Polytechnic, Singapore
来源：
International Journal of Wireless and Mobile Computing | 2009年 / 3卷 / 04期
关键词：
Correlation detector; Generalised Gaussian; MAP detector; Wavelet transform;
D O I：
10.1504/IJWMC.2009.029346
中图分类号：
学科分类号：
摘要：
A detector based on Maximum A-posteriori Probability (MAP) criterion has been introduced for identifying image watermark in the Discrete Cosine Transform (DCT) domain. This type of detector has been shown to be optimum and robust to common image processing operations. In this paper, an MAP detector in the Discrete Wavelet Transform (DWT) domain is proposed. It is based on modelling the wavelet coefficients by a generalised Gaussian distribution. Simulations are used to compare the proposed detector with the conventional correlation detector in terms of detection effectiveness. Copyright © 2009 Inderscience Enterprises Ltd.
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收藏
页码：265 / 270
页数：5
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