Multimedia Courseware Copyright Notification and Protection Based on DCT
Ruo-hong Huang, Huailan Liu, Yongqiang Chen · 2007
According to the characteristic of courseware screen stream, this paper proposes a novel digital watermark solution for the color image of screen stream based on DCT. It embeds visible and invisible watermarks into different area of screen color image to achieve screen color image with dual digital watermark embedded. The effectiveness and good results of this method in multimedia courseware copyright notification and protection have been testified by a test system.