Digital image watermark embedding and blind extracting in the ridgelet domain

被引：0

作者：

Zhang, Zhi-Yu ^{[1
]}

Yu, Hai-Yan ^{[1
]}

Zhang, Jiu-Long ^{[2
]}

Zhang, Xiao-Li ^{[2
]}

机构：

[1] Institute of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China

[2] Institute of Computer, Xi'an University of Technology, Xi'an 710048, China

来源：

Tien Tzu Hsueh Pao/Acta Electronica Sinica | 2007年 / 35卷 / 09期

关键词：

Algorithms - Digital watermarking - Edge detection - Feature extraction - Mathematical transformations - Robustness (control systems) - Signal to noise ratio - Textures - Threshold logic - Transparency;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A digital image watermark embedding and extracting algorithm is presented based on the multiscale ridgelet transform (RT) which can efficiently represent image with linear singularities. The RT transform also has directional sensitivity so that among the transformed coefficients the most significant ones represent the most energetic directions of straight edges in an image. To get straight edges the digital image with curvilinear edges or texture is partitioned into small pieces. Then the pieces are treated by RT and the most energetic directions of pieces whose energy are greater than some threshold are selected. And eventually the watermarks are embedded in the middle ridgelet subband of the selected directions. Different noises with different SNR are added to the watermarked image in the experiments and the results prove robustness and transparency.

引用

页码：1804 / 1808

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