CAJ | 학술논문

该文提出了一种基于多变换域的多功能水印算法。首先通过量化DCT系数嵌入鲁棒水印以保护版权，然后在提升小波域的最低有效位嵌入脆弱水印以检测篡改。仿真实验结果表明，算法具有良好的不可见性。对于加噪、滤波、JPEG压缩等常规攻击，剪切、缩放等几何攻击有较强的抗攻击能力，并能较好地检测出对图像的细微篡改。
해문제출료일충기우다변환역적다공능수인산법。수선통과양화DCT계수감입로봉수인이보호판권，연후재제승소파역적최저유효위감입취약수인이검측찬개。방진실험결과표명，산법구유량호적불가견성。대우가조、려파、JPEG압축등상규공격，전절、축방등궤하공격유교강적항공격능력，병능교호지검측출대도상적세미찬개。
This paper proposes a kind of multifunction watermarking algorithm based on mult-transform-do-main.Firstly quantify DCT coefficients to embedding robust watermarking to protect copyright , then embed fragile watermarking in least significant bit ( LSB) to detect tampering .Simulation results show that the algo-rithm has good invisibility .For normal attacks , such as adding noise , filtering, JPEG, etc., and geometric attacks, such as shear , scaling, etc., the algorithm has good robustness and can detect the subtle alteration .