基于DCT和DWT的彩色图像双功能水印算法
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摘要
针对现今多数数字水印算法仅针对灰度图像并且功能单一的问题,提出一种彩色图像双功能水印算法,不仅增加了水印的信息量同时还可以实现版权保护和内容认证的双重功能。该算法是基于RGB色彩空间,首先提取原始彩色图像的R、G、B 3个彩色分量,然后将版权水印嵌入蓝色分量的低频系数中,认证水印嵌入绿色分量的中频系数中。实验结果表明,版权水印具有较好的鲁棒性和不可见性,认证水印可实现盲提取。
Contrapose?the?existing?problem in the majority of digital watermarking algorithms nowadays only aiming at gray image and single function,a dual watermarking algorithm for color image was proposed.Not only increase the watermarking information at the same time also can achieve the dual function of copyright protection and content authentication.The algorithm is based on RGB color space,first extracting three color components of R、G、B from the original color image,and then embedding copyright watermark into the low frequency coefficient of blue component and authentication watermark into the intermediate frequency coefficient of green component.The experimental results show that the copyright watermark has good robustness and invisibility, authentication watermark can realize blind extraction.
Contrapose?the?existing?problem in the majority of digital watermarking algorithms nowadays only aiming at gray image and single function,a dual watermarking algorithm for color image was proposed.Not only increase the watermarking information at the same time also can achieve the dual function of copyright protection and content authentication.The algorithm is based on RGB color space,first extracting three color components of R、G、B from the original color image,and then embedding copyright watermark into the low frequency coefficient of blue component and authentication watermark into the intermediate frequency coefficient of green component.The experimental results show that the copyright watermark has good robustness and invisibility, authentication watermark can realize blind extraction.
引文
[1]胡学龙.数字图像处理[M].2版.北京:电子工业出版社,2011.
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[3]陈星娥.图像版权保护和内容认证的双数字水印技术研究[J].廊坊师范学院学报:自然科学版,2013,13(4):38-43.
[4]张利,吕建平,杨龙.基于DCT和DWT变换域的双功能水印方法[J].西安邮电大学学报,2013,18(1):50-53.
[5]聂雪莲.面向图像版权和内容保护的数字水印技术研究[D].郑州:解放军信息工程大学,2012.
[6]于帅珍,沈建国.基于DCT和DWT的彩色图像盲数字水印算法[J].计算机应用与软件,2007,24(8):210-212.
[7]虞晓庆,李宏昌,张茂.基于提升小波的多功能彩色数字图像双水印算法[J].计算机应用与软件,2013,30(2):50-53.
[8]虞晓庆,李宏昌,张茂.兼具版权保护和内容认证彩色图像双水印算法[J].电子设计工程,2012,20(23):32-35.
[9]于帅珍.基于小波变换的彩色图像双盲水印算法[J].安徽工程科技学院学报:自然科学版,2006,21(2):49-52.
[2]贾二群,吕建平.基于DCT域的双重数字图像水印算法的研究[D].西安:西安邮电大学,2011.
[3]陈星娥.图像版权保护和内容认证的双数字水印技术研究[J].廊坊师范学院学报:自然科学版,2013,13(4):38-43.
[4]张利,吕建平,杨龙.基于DCT和DWT变换域的双功能水印方法[J].西安邮电大学学报,2013,18(1):50-53.
[5]聂雪莲.面向图像版权和内容保护的数字水印技术研究[D].郑州:解放军信息工程大学,2012.
[6]于帅珍,沈建国.基于DCT和DWT的彩色图像盲数字水印算法[J].计算机应用与软件,2007,24(8):210-212.
[7]虞晓庆,李宏昌,张茂.基于提升小波的多功能彩色数字图像双水印算法[J].计算机应用与软件,2013,30(2):50-53.
[8]虞晓庆,李宏昌,张茂.兼具版权保护和内容认证彩色图像双水印算法[J].电子设计工程,2012,20(23):32-35.
[9]于帅珍.基于小波变换的彩色图像双盲水印算法[J].安徽工程科技学院学报:自然科学版,2006,21(2):49-52.