发明名称 |
Watermarking images with wavepackets encoded by intensity and/or phase variations |
摘要 |
A phase space encoded watermark is applied to an image to guard against counterfeiting and/or unauthorized copying. The watermark is formed of wavepackets. An authentication message is encoded in the wavepackets by variations in one or both of the intensities of the wavepackets and the phases of the wavepackets.
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申请公布号 |
US2006045306(A1) |
申请公布日期 |
2006.03.02 |
申请号 |
US20040929588 |
申请日期 |
2004.08.30 |
申请人 |
PITNEY BOWES INCORPORATED |
发明人 |
CORDERY ROBERT A.;SCHMIDT ERIK |
分类号 |
G06K9/00 |
主分类号 |
G06K9/00 |
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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