发明名称 |
ELECTRONIC WATERMARK DETECTION DEVICE, METHOD THEREOF, AND PROGRAM |
摘要 |
<p>A digital watermark embedding apparatus for embedding digital watermark information by superimposing macroblock patterns on an image is disclosed. The digital watermark embedding apparatus: spreads input digital watermark information to obtain an embedding series having a length corresponding to a number of pixel blocks of a macroblock pattern; selects at least a frequency from among predetermined plural frequencies according to a term value of the embedding series corresponding to a position of a pixel block in the macroblock pattern, and sets a waveform pattern corresponding to the selected frequency as a pixel of the pixel block; and amplifies, with an embedding strength value, the macroblock pattern on which a waveform pattern is superimposed on each pixel block by the waveform pattern setting unit, and superimposes the macroblock pattern on an input image like a tile.</p> |
申请公布号 |
EP1713249(A1) |
申请公布日期 |
2006.10.18 |
申请号 |
EP20050709510 |
申请日期 |
2005.01.31 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
NAKAMURA, TAKAO;KATAYAMA, ATUSHI;YAMAMURO, MASASHI |
分类号 |
H04N1/32;G06T1/00;H04N1/387;H04N1/40;H04N19/00;H04N19/467;H04N19/70 |
主分类号 |
H04N1/32 |
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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