摘要
文献已报道多种可用于印刷品防伪的数字水印算法。由于打印/扫描过程的特殊性,使得其中有些算法的水印检测效果达不到实用要求。文章在研究打印/扫描对数字图像所引起的失真的规律基础上,提出了一种在离散傅里叶变换(DFT)域实现的、可用于印刷品防伪的数字水印嵌入算法。实验结果表明:不需原始图像,即可检测出用此算法嵌入印刷图像中的不可见标记。
Most of watermarking algorithms reported on literature are of little value to image that have been printed and then scanned. In this paper, a new algorithm for embedding information in digital images is proposed based on the analysis of the distortion of image data introduced by printing/scanning. This algorithm is realized on Discrete Fourier Transform domain of original image, and is available for anti-counterfeit of printed images. Experiment results show： the embedded signal in the printed image is invisible, and they can be detected （decoded） without use the original image.
出处
《信息安全与通信保密》
2006年第6期73-74,77,共3页
Information Security and Communications Privacy
关键词
数字水印
离散傅里叶变换
打印
扫描
防伪
watermark, discrete Fourier transform, printing, scanning, anti-counterfeit
