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An IWT based blind and robust image watermarking scheme using secret key matrix

机译：基于IWT的秘密密钥矩阵盲鲁棒图像水印方案

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摘要

In this paper, the authors have proposed a binary watermark embedding approach for protecting the copyright ownership of the gray-scale images. The proposed watermark embedding process is realized in integer wavelet transform (IWT) domain to defend the robustness property. Instead of inserting the watermark bits directly in the coefficients of cover media, an indirect embedding mechanism is proposed with the reference to a logistic map based secret key matrix which enhance the secrecy of the proposed embedding approach. Initially, the approximate sub band of the IWT transformed cover image is selected with the intention to embed the watermark. Later, a secret key matrix of size corresponding to the approximate sub band of the cover image is formed using the logistic map with secret parameters. During the watermark embedding process, the approximate sub band is modified indirectly with reference to the secret key matrix and a proposed division table. The scheme is tested on a set of standard images and satisfactory results are achieved. In addition, the proposed schemes is also able to extract the watermark information in blind manner. Also, the scheme is comparable with some other related schemes. Finally, the proposed watermarking scheme is able to survive the watermark even after performing certain types of image manipulation attacks.
机译：在本文中，作者提出了一种二进制水印嵌入方法来保护灰度图像的版权。提出的水印嵌入过程在整数小波变换（IWT）域中实现，以捍卫鲁棒性。代替直接将水印位插入覆盖媒体的系数中，参考基于逻辑图的秘密密钥矩阵，提出了一种间接嵌入机制，该机制提高了所提出的嵌入方法的保密性。最初，选择IWT变换后的封面图像的近似子带，以嵌入水印。随后，使用具有秘密参数的逻辑图来形成大小对应于封面图像的近似子带的秘密密钥矩阵。在水印嵌入过程中，参考秘密密钥矩阵和建议的划分表间接修改近似子带。该方案在一组标准图像上进行了测试，并获得了满意的结果。另外，提出的方案还能够以盲目的方式提取水印信息。而且，该方案可与一些其他相关方案相媲美。最后，提出的水印方案即使在执行某些类型的图像操作攻击后也能够幸免于水印。

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