| 摘要 |
PROBLEM TO BE SOLVED: To distribute a content in such a way that a sales promotion effect as well as an advertisement function can be improved. SOLUTION: Information about copyright protection is embedded as invisible electronic watermark information into the content of an original image, and advertisement information and raffle information are also embedded as visible electronic watermark information, and the content is distributed. COPYRIGHT: (C)2004,JPO&NCIPI |
