CAJ | 학술논문

在基于离散余弦变换DCT域基础上，提出一种数字水印加密算法。该算法以二值图像作为水印信息，通过Arnold变换置乱加密后，采用扩频技术嵌入到载体图像的中频部分。实验结果表明，该算法具有很好的鲁棒性和安全性，并能有效抵抗如滤波、噪声和剪切等常见的非几何攻击。
재기우리산여현변환DCT역기출상，제출일충수자수인가밀산법。해산법이이치도상작위수인신식，통과Arnold변환치란가밀후，채용확빈기술감입도재체도상적중빈부분。실험결과표명，해산법구유흔호적로봉성화안전성，병능유효저항여려파、조성화전절등상견적비궤하공격。
This paper refers a digital watermark encryption algorithm based on DCT (Discrete Cosine Transform).The al-gorithm use a binary image as watermark information,throughing Arnold transform scrambling encryption.Then utilize the spread-spectrum technology embedded into the image of Mid-frequency section.Experiment shows that the approach has good robustness and security.Moreover,the non-geometric attacks such as cutting,filtering and noise can be wel defended.