一种有效的图像盲水印算法

数字水印技术是数字产品版权保护领域研究热点之一。文章提出一种小波域数字图像盲水印方案,嵌入过程中在原始图像小波域中随机选取系数加以调整嵌入二值图像作为水印,保证其不可见性、鲁棒性和安全性。提取过程中勿需原始图像,利用盲源分离算法提取水印。实验表明本算法对于通常图像处理具有较强鲁棒性,是一种有效的盲水印技术。

An effective blind watermarking algorithm of images

With the development of the Internet, the technique of digital watermarking has attracted more and more attention in the field of copyright protection for the digital products. In this paper, a digital watermarking algorithm is presented based on the Blind Source Separation (BSS) algorithm. In the presented algorithm, the binary image viewed as the watermark is embedded into the detailed components in the wavelet domain of the initial images. The embedding position is chosen pseudo-randomly to avoid some malicious attacks. If need be, the watermarking image can be extracted quickly by using the BSS algorithm in the absence of the initial image. The experiments show that the algorithm is an effective and secure one that is robust to the common image processing such as noising, cropping, scaling and compressing.