Effective Fragile Watermarking for Image Authentication with High-quality Recovery Capability
Effective Fragile Watermarking for Image Authentication with High-quality Recovery Capability
复制标题
有效的脆弱水印图像认证与高质量的恢复能力
DOI：
10.3837/tiis.2013.11.023
复制
发表时间：
2013-11
影响因子：
1.5
通讯作者：
Tai-Jung Hsu
中科院分区：
文献类型：
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作者：
Chuan Qin;Chin-Chen Chang;Tai-Jung Hsu
本文提出了一种用于篡改检测和内容恢复的脆弱图像水印方案。该算法将覆盖图像划分为一系列互不重叠的块，并利用密钥构造块映射关系。每个块的多个具有直流和较低MSB频率的DCT系数被用于生成参考比特，并且不同的系数根据其重要性被分配不同的比特数用于表示。为了提高恢复性能，认证位分别由MSB和参考位生成。LSB替换隐藏后，每个块中嵌入的水印比特由其自身信息和其映射块信息组成。在接收器侧，可以使用有效提取的参考位来检测和恢复具有篡改MSB的所有块。实验结果证明了该方案的有效性。
In this paper, we propose an effective fragile image watermarking scheme for tampering detection and content recovery. Cover image is divided into a series of non-overlapping blocks and a block mapping relationship is constructed by the secret key. Several DCT coefficients with direct current and lower frequencies of the MSBs for each block are used to generate the reference bits, and different coefficients are assigned with different bit numbers for representation according to their importance. To enhance recovery performance, authentication bits are generated by the MSBs and the reference bits, respectively. After LSB substitution hiding, the embedded watermark bits in each block consist of the information of itself and its mapping blocks. On the receiver side, all blocks with tampered MSBs can be detected and recovered using the valid extracted reference bits. Experimental results demonstrate the effectiveness of the proposed scheme.
DOI：
10.3837/tiis.2013.11.022
发表时间：
2013-11
期刊：
KSII Trans. Internet Inf. Syst.
影响因子：
--
作者：
Chien-Lung Hsu;Han-Yu Lin
通讯作者：
Chien-Lung Hsu;Han-Yu Lin