摘要
数字水印技术是解决数字产品中版权保护以及数字信息的安全传输等迫切问题的一种行之有效和最具发展潜力的技术。采用基于Arnold置乱变换和小波变换的有含义数字水印算法,通过系数比较将水印嵌入在垂直和水平方向的中频分量中,同时改进原算法的系数调整方法,减少了误差。实验结果表明,与原系统相比,改进后的水印系统不仅较好地保持了图像的质量,对噪声污染、滤波、剪切等图像攻击都增强了水印图像的鲁棒性。
The technology of digital watermarking is a feasible and the most potential technology to solve the copyright protection of digital products as well as the transmission safety of digital information. The significant digital watermarking al- gorithm is adopted based on Arnold scrambling transformation and wavelet transformation. By coefficients comparison, the watermarking can be embedded to the vertical and parallel intermediate frequency, and the former algorithm of coefficients adjustment can be improved to reduce the error. The experimental results show that the improved watermarking system can preferably maintain the image quality and enhance the robustness of watermarking images to avoid the attack from noise pollution, filter and cutting.
出处
《现代电子技术》
2010年第20期67-70,共4页
Modern Electronics Technique
关键词
数字水印
小波算法
系数比较
鲁棒性
digital watermarking
wavelet algorthm
coefficients comparison
robustness
