用于图像资源版权保护的SVD域数字水印方法

Digital Watermarking Method in SVD Domain for Copyright Protection of Image Resources

图像数字水印技术,作为潜在的可有效解决数字图书馆中图像资源版权保护问题的手段,受到了广大学者越来越多的关注。为有效地实现图像资源的版权保护,该文在讨论和分析了图像资源版权保护的现状和发展趋势后,提出了一种新的简单、方便、容易的SVD域图像数字水印方法。该文方法在对数字水印的提取时,无须原始图像的参与,实用性强。实验结果表明,该文方法对数字水印具有很好的透明性,并且方法对图像JPEG压缩、亮度调整、对比度调整、叠加噪声等常见图像处理攻击均具有很强的稳健性。因此,该文方法可有效地运用于图像资源的版权保护。

Image digital watermarking technology gets more and more attention by scholars since it is a potential effective way to solve the problem of copyright protection of image resources in digital library. In order to effectively realize copyright protection of image resources,after discussing and analyzing the actuality and the tendency of copyright protection of image resources,this paper proposed a novel handy and easy image digital watermarking method in SVD domain. In the process of digital watermark extracting,this method didn’t need the original image,so this method was more useful. Experimental results showed that this method has fine transparency of the embedded digital watermark and was strongly robust against common image- processing attacks such as JPEG- compression,brightness adjustment,contrast adjustment and noise adding. Thus,the proposed method was much fit and effective for the copyright protection of image resources.