发明名称 |
Digital watermark embedding method and apparatus, and digital watermark |
摘要 |
A specific frequency extraction unit extracts a specific frequency component signal from an input image signal, a phase controller and amplitude controller control at least one of the phase and amplitude of the specific frequency component signal in accordance with watermark information, and a watermark information superposition unit superposes the specific frequency component signal on the input image signal to generate an image signal embedded with the watermark information. |
申请公布号 |
US6952486(B2) |
申请公布日期 |
2005.10.04 |
申请号 |
US20040815868 |
申请日期 |
2004.04.02 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
YAMAKAGE TOMOO;MURATANI HIROFUMI;YAMADA HISASHI;KAMBAYASHI TORU;KOTO SHINICHIRO |
分类号 |
G06T1/00;H04N1/32;H04N1/387;H04N5/913;H04N7/025;H04N7/035;H04N7/08;H04N7/081;(IPC1-7):H04K1/00 |
主分类号 |
G06T1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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