基于截断面包师变换的DCT域数字图像水印算法

Based on the Baker's Transformation Image Watermark Algorithm in DCT Domain

结合混沌置乱中的截断面包师变换和HVS视觉掩盖特性,提出了一种基于面包师变换的DCT域数字图像公开水印算法。该方法采用截断面包师面变换对水印图像进行加密,利用DCT域的视觉掩盖特性,在图像的不同部分嵌入不同强度的经混沌置乱后的水印,且提取时无需原始图像。实验结果表明:在保证水印不可视的条件下,该方法提高了水印的鲁棒性,并对JPEG压缩、中值滤波等攻击具有很好的抵抗能力。

In this paper, we present a novel digital watermark algorithm based on HVS marking and the Baker＇s transformation. The algorithm uses the baker＇s transformation to encrypt watermark image and utilizes the visual masking in DCT domain to embed the encrypted watermark in different image parts with different intensity, extracting watermark without original image. Experimental results show that the algorithm can improve the robust of watermarking and keep it invisible and stand against several attacks, such as JPEG compression and filter, etc.