发明名称 |
Watermark detection |
摘要 |
An improved method and arrangement for detecting a watermark in an information (e.g. image or video) signal are disclosed. The detection is more reliable and less vulnerable to image processing by partitioning the image into a sequence of blocks having a predetermined size, accumulating the blocks, computing a value indicative of the correlation of the accumulated blocks and the watermark having the predetermined size, and detecting whether the correlation value is larger than a predetermined threshold.
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申请公布号 |
US2005089192(A1) |
申请公布日期 |
2005.04.28 |
申请号 |
US20040990633 |
申请日期 |
2004.11.17 |
申请人 |
HAITSMA JAAP A.;KALKER ANTONIUS A.;DENISSEN ADRIANUS J. |
发明人 |
HAITSMA JAAP A.;KALKER ANTONIUS A.;DENISSEN ADRIANUS J. |
分类号 |
H04N7/08;G06K9/00;G06K9/36;G06K9/46;G06T1/00;G06T7/00;G09C5/00;H04H20/31;H04N1/32;H04N1/387;H04N5/913;H04N5/92;H04N7/081;H04N7/26;(IPC1-7):G06K9/00 |
主分类号 |
H04N7/08 |
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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