| 李克秋,庄庶,张永.一种基于几何不变特征区域的数字水印算法[J].,2011,(2):274-280 |
| 一种基于几何不变特征区域的数字水印算法 |
| A digital watermarking algorithm based on geometric invariable feature area |
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| DOI：10.7511/dllgxb201102021 |
| 中文关键词: 数字图像水印 几何攻击 特征点 特征区域 |
| 英文关键词: digital image watermarking geometric attacks feature points feature area |
| 基金项目:教育部新世纪优秀人才支持计划资助项目(NCET-07-0132)；国家自然科学基金资助项目(重大项目90718030). |
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| 中文摘要: |
| 为了提高数字水印技术抗几何攻击的能力,提出了一种新的抗几何攻击的数字水印算法．该算法以稳定的特征点和方向选取能够应对几何攻击的不变特征区域,并对选中的区域进行离散余弦频域变换,最后在离散余弦变换的中频系数中嵌入水印信息．实验结果表明,该算法对于基于旋转、缩放、裁减、滤波、压缩等一般性几何攻击,以及它们的复合攻击都具有良好的稳健性． |
| 英文摘要: |
| In order to improve the ability of resisting geometric attacks for digital watermarking technology, a new digital watermarking algorithm against geometric attacks is proposed. It selects invariable feature area which can reply to the geometric attacks based on the steady feature points and direction, then makes discrete cosine frequency domain transform on the selected area, and at last embeds watermark information in the middle frequency coefficient of the discrete cosine transform. The experimental results indicate that the proposed algorithm has a good solidity for not only the single attack of the rotation, scaling, cutting, filtering, compressing, but also their composite attacks. |
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