基于离散余弦变换的图像数字水印算法

Digital Watermark Algorithm Based On Discrete Cosine Transformation

从密码术和信息隐藏的区别出发,运用数字通信理论中的数据加扰技术,提出一种在图像中植入数字水印的方法,该方法与JPEG图像数据的压缩标准算法相一致,运用了离散余弦变换,不仅可以方便地实现图像的植入,还可避免进行两次重复的变换。

Starting from the difference between encryption and information hiding, and using data interfering technology, the paper proposed a kind of method, the method operates in the frequency domain embedding watermark in the original image, and the method corresponds with JPEG compression Algorithms easily embedding, but avoiding repeated transform, effectively improving robustness and perceptual invisibility to image processing techniques.