基于数据存储的小波数字水印算法

提出了一种基于数据储存的D W T算法。该算法打破了传统小波变换以整幅图像为研究对象的思路,而是以存放在存储器中的图像数据为研究对象,先将其分成若干块,分别对每一块数据进行D W T之后,再进行水印的嵌入,并在嵌入之前进行图像置乱预处理,以提高安全性和隐蔽性,兼顾了水印的不可见性和鲁棒性。实验结果表明,本文算法在保证水印不可见性的同时,对图像的J P E G压缩、噪声、滤波、剪切等处理,均有较好的鲁棒性。

Wavelet digital watermarking algorithm base on data storage

A new DWT algorithm is proposed based on data storage.Compared with the traditional wavelet transform,the algorithm is not to the whole image as the research object,but the image data stored in the memory.Before the embedding of the watermark,it is divided into several data blocks,and DWT is carried out for each block,then to improve the safety and concealment,image scrambling preprocessing is performed,which taking into account the watermark invisibility and robustness.The experimental results showed that ...