发明名称 |
ELECTRONIC WATERMARK EMBEDDING DEVICE, ELECTRONIC WATERMARK DETECTION DEVICE, METHOD THEREOF, AND PROGRAM |
摘要 |
<p>A digital watermark embedding apparatus of the present invention includes: a block dividing unit for dividing an input image into plural pixel blocks; a digital watermark information spreading unit for obtaining an embedding series having a length corresponding to a number of divided pixel blocks; a block-by-block embedding unit for selecting at least a frequency from predetermined plural frequencies according to a term value of the embedding series corresponding to a position of a pixel block in the image, amplifying amplitude of a waveform pattern corresponding to the selected frequency with an embedding strength value, and superimposing the waveform pattern in which the amplitude is amplified on the pixel block; and an image outputting unit for outputting an image on which a corresponding waveform pattern is superimposed on each pixel block by the block-by-block embedding unit.</p> |
申请公布号 |
KR100730611(B1) |
申请公布日期 |
2007.06.21 |
申请号 |
KR20057016750 |
申请日期 |
2005.09.08 |
申请人 |
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发明人 |
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分类号 |
H04N5/913;G06T1/00;H04N1/32;H04N1/387;H04N1/40;H04N7/167 |
主分类号 |
H04N5/913 |
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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