CAJ | 학술논문

以静态数字图像为主要研究对象,提出一种采用载体和水印图像进行同步小波变换的水印嵌入算法。为了获得较好的嵌入效果,在同步分解的方法中采用重复嵌入方式。首先对载体和水印图像进行小波分解,然后将水印低频嵌入到载体图像第二层低频,最后将水印中频和高频对应嵌入至载体图像的中频和高频。采用该算法嵌入时保持嵌入强度、噪声强度不变,与载体单一分解算法进行对比。实验结果表明：该算法对高斯噪声具有良好的隐藏性和鲁棒性。
이정태수자도상위주요연구대상,제출일충채용재체화수인도상진행동보소파변환적수인감입산법。위료획득교호적감입효과,재동보분해적방법중채용중복감입방식。수선대재체화수인도상진행소파분해,연후장수인저빈감입도재체도상제이층저빈,최후장수인중빈화고빈대응감입지재체도상적중빈화고빈。채용해산법감입시보지감입강도、조성강도불변,여재체단일분해산법진행대비。실험결과표명：해산법대고사조성구유량호적은장성화로봉성。
In this paper,the static digital images are studied.An embedding watermarking algorithm is proposed.The watermark image transferred based on wavelet transform domain is introduced.In order to improve the embedding effect,the way of repeated embedding is used in the synchronous decomposition.Firstly,the carrier and the watermark image are decomposed by the wavelet transformation.Then,the low-frequency of watermark is embedded into the second low-frequency of the carrier image.Finally,the medium and high frequency of the watermark are inserted into the medium and high frequency of the carrier image correspondingly.The processing of embedding keep the embedding intensity and the noise strength unchanged.Comparison is made between the proposed algorithm and the single decomposition algorithm.Experimental result demonstrates that the presented scheme achieves better invisibility and robustness by the attack of Gaussian noise.