The Research on Image Watermark Spread Spectrum Method
Jingjing Liu · Journal of Anhui Radio & TV University · 2006
Digital watermarking is a valid method to protect the copyright of multi-media works(such as image,video,audio).In recent years,it has caused tremendous interests in domestic and international area.As a kind of digital watermarking technique,image watermarking technique is to hide author's important information in common images and audience can not identify what has been hidden.In this text,we mainly discuss a kind of image watermark spread spectrum method carried out in DCT transform domain and give discriptions in details on how to execute comparisons and analysis between different image watermark spread spectrum methods with perceptibility and robustness evaluation standards so that we can get a comparably reasonable conclusion.