发明名称 |
Digital watermark detecting apparatus |
摘要 |
A digital watermark embedding apparatus includes: an extractor configured to extract a specific frequency component from each of N kinds of scaled images about an input image signal to generate N kinds of extracted signals; a generator configured to compress the amplitude of the respective extracted signals on the basis of N kinds of to-be-embedded information corresponding to the N kinds of extracted signals to generate watermark image signals by shifting the predetermined phases; and a superimposer configured to add the N kinds of watermark image signals to the input image signal to generate an output image signal. |
申请公布号 |
US8204271(B2) |
申请公布日期 |
2012.06.19 |
申请号 |
US20080235196 |
申请日期 |
2008.09.22 |
申请人 |
KOGURE NAKADA;YAMAKAGE TOMOO;KABUSHIKI KAISHA TOSHIBA |
发明人 |
KOGURE NAKADA;YAMAKAGE TOMOO |
分类号 |
G06K9/00 |
主分类号 |
G06K9/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|