【摘要】 数字水印是近年来出现的一种新的数字媒体产品版权保护技术,其过程可看作干扰信道的通信,不可见性和鲁棒性是数字水印最基本的要求。文章根据通信中的差错控制编码(ECC)原理提出了一种提高数字水印鲁棒性方法,水印的嵌入在DCT域进行,为保证水印不可见,嵌入算法结合图像特征和人眼视觉掩蔽特性自适地将水印信号嵌入到DCT系数中。实验结果表明该方法能大大提高水印的鲁棒性。更多还原

【Abstract】 Digital watermark is a new technique for digital multimedia copyright protection.Its process can be modeled as a communication channel that exposes to multiple kinds of disturbance.The robustness and the imperceptibility are the basic requirements of the digital watermark.A method for enhancing the robustness of digital image watermark is presented in this paper.The method is based on the ECC principle used in digital communication.To assure impercepti-bility,the watermark is adaptively embedded into coefficients of image DCT transformation by exploiting the visual masking and texture characteristics of the image that carries watermark.The experimental results show that the method can enhance the robustness of digital watermark.更多还原