可携带图像特性信息的双盲水印设计与实现

Design and realization on dual blind digital watermarkings of carrying image feature

为实现保护载体图像特征信息的和隐藏标识信息的目的,提出一种基于彩色图像的双盲水印方案。利用彩色图像的颜色空间特性和色度分布不均匀的特点,充分结合DWT、DCT的频域变换特性,将原载体图像变换到YUV颜色空间,将不同的颜色通道变换到频域并嵌入两个水印,反变换到空域并转换到RGB颜色空间得到含两个隐藏信息的图像。实验结果表明,该算法能够实现水印的盲提取,能够抵抗一些常见攻击,具有良好的视觉不见性和鲁棒性。

To protect the features of the image and hide the identified information,a double blind watermarkings scheme based on color image carrying the image features and the identified information was designed.The characteristics of color space and inhomogeneous chromaticity distribution of the color image were utilized,and the characteristics of DWT domain and DCT domain were combined.The color space of original carrier image was changed from RGB to YUV.Two watermarks were embedded in different color channels which were then changed into the space and converted to the RGB color space.An image containing double watermarkings was formed.Experimental results demonstrate that the double blind watermarking scheme shows good visual inconsistency and robustness.