CAJ | 학술논문

半脆弱水印因为在多媒体内容认证方面的重要作用而受到人们密切的关注。为了能够区分偶然攻击与恶意篡改，半脆弱水印需要对一般的内容保护图像操作有一定的鲁棒性。基于此，提出了遗传算法的半脆弱数字图像水印方法。根据图像局部区域的类型自适应地确定图像局部区域的水印嵌入强度，GA用来优化水印的嵌入位置。实验结果证实了所提的算法的优点，表明该方法具有较好的不可见性和鲁棒性，并实现了印刷图像载体版权保护。
반취약수인인위재다매체내용인증방면적중요작용이수도인문밀절적관주。위료능구구분우연공격여악의찬개，반취약수인수요대일반적내용보호도상조작유일정적로봉성。기우차，제출료유전산법적반취약수자도상수인방법。근거도상국부구역적류형자괄응지학정도상국부구역적수인감입강도，GA용래우화수인적감입위치。실험결과증실료소제적산법적우점，표명해방법구유교호적불가견성화로봉성，병실현료인쇄도상재체판권보호。
Semi-fragile watermark has attracted attentiondue to its important role in content authentication for multimedia. In order to differentiate incidental attacks and malicious attacks, the semi-fragile watermark must be robust against content-protection image pro- cessing. This paper proposes a new semi-fragile digital image watermarking scheme based on genetic algorithm (GA). In the scheme, the genetic algorithm used for optimizing embedding strength is employed to optimize the embedding location. Experimental results show that our scheme has both high fidelity and good robustness, which can realize digital copyright protection for printed image.