基于整数小波系数直方图移位的可逆半脆弱水印

Xiaoyun Wu
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引用次数: 35

摘要

提出了一种用于图像认证的可逆半脆弱水印方案。该方案通过在整数小波域的LL4子带中嵌入水印,具有大多数文献报道的可逆半脆弱认证水印方案所没有的篡改定位能力。通过对相应子带系数直方图中幅度较大的整数小波系数进行直方图移位,将用于恢复原始图像的数据隐藏在高频子带中,从而保持标记图像的良好视觉质量。此外,该方案在较低的质量因数下对JPEG有损压缩具有鲁棒性。实验结果证明了该方案的优越性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Reversible Semi-fragile Watermarking Based on Histogram Shifting of Integer Wavelet Coefficients
A reversible semi-fragile watermarking scheme for image authentication is presented in this paper. By embedding a watermark in LL4 subband of the integer wavelet domain, the scheme has the ability for tamper localization which is not mentioned in most of the reversible semi-fragile authentication watermarking scheme reported in the literature. Data that are used to restore the original image are hidden in the high frequency subbands by histogram shifting of integer wavelet coefficients with higher magnitude in the corresponding subband coefficients histogram, and therefore keep good visual quality of the marked image. Moreover, this scheme is robust to JPEG lossy compression at a lower quality factor. Experimental results demonstrate the merits of the proposed scheme.
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