High-Capacity Text Watermarking Resistive to Print-Scan Process
High-Capacity Text Watermarking Resistive to Print-Scan Process
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发表时间：
2011
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影响因子：
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通讯作者：
Guo Cheng-qing;Xu Guo-ai;Niu Xin-xin;Li Yang
中科院分区：
文献类型：
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作者：
Guo Cheng-qing;Xu Guo-ai;Niu Xin-xin;Li Yang
在分析现有文本水印技术的基础上，提出了一种抗打印扫描的高容量文本水印方案。首先将二进制文档图像分割成单个字符。然后，根据字符的打印扫描不变量和复杂度，通过翻转每个字符的边界像素来嵌入一个多比特水印。建立定量模型，实现字符像素量化，使视觉失真最小化。实验结果表明，该方案可以提高嵌入容量。它可以有效地抵抗打印扫描攻击，从而为硬拷贝文档添加水印。
Based on an analysis of the existing text watermarking techniques,a high-capacity text watermarking scheme resistive to print-and-scan processes is proposed.The binary document image is first segmented into individual characters.A multi-bit watermark is then embedded by flipping the boundary pixels of each character based on a print-scan invariant quantity and complexity of the character.A quantitative model is established to achieve the character pixel quantization,which can minimize visual distortion.Experimental results show that the proposed scheme can increase embedding capacity.It can effectively resist print-scan attacks so as to watermark hardcopy documents.