摘要
数字水印技术是将水印信号隐藏在数字图像、声音、文档、图书、视频等数字产品中,目前比较典型的图像和视频数字水印方法是利用人类视觉系统(HVS)的空间频率特性来折衷水印的知觉透明性和鲁棒性,利用HVS相关特性,可以构建数字水印理论框架,从而给出相应的定义,即利用水印嵌入算法E,将由水印生成算法G生成的水印W嵌入到多媒体数据X中,保证不引起X的质量下降,即保证水印化数据Xw和原始数据X具有知觉相似性。并且,利用提取算法D,能够从Xw中提取出水印W*,满足W*和W等价。
The digital watermark technology hides the watermark signal in digital image, sound, documents, books, video frequency products and so on. Now the comparatively typical digital watermark method of image and video frequency is using the spatial frequency characteristic of the human vision system （HVS） to comprising the watermark＇s perceptual transparency and robustness, using the HVS＇ correlative characteristic, we may construct the digital watermark＇s theory frame,thus produce the corresponding definition, namely making use of watermark＇s embedding algorithm E, we may make the watermark W which derives from watermark＇s generation algorithm embed into the multimedia data X,then guarantee no quality reduction of X, namely guarantee watermark data Xw possessing perceptual comparability with raw data X. Furthermore,using extraction algorithm D,we can extract watermark W^＊ which meets with the equivalence of W^＊ and W from Xw.
出处
《现代电子技术》
2006年第13期62-63,66,共3页
Modern Electronics Technique
关键词
数字水印技术
人类视觉系统
知觉相似性
多媒体
digital watermarking
human visual system
perceptual similarity
multimedia
