发明名称 |
METHOD AND DEVICE FOR ASSESSING THE PRESENCE OF A WATERMARK IN A VIDEO |
摘要 |
The invention relates to a method for assessing the presence of a watermark in a video wherein the video comprises at least a sequence of frames. The method comprises for at least one frame among one of the sequences of frames the steps of computing a set of axial cross-correlation values, wherein each axial cross-correlation value corresponds to a correlation between the frame and a reference watermark shifted along a spatial horizontal axis; obtaining a detection score by computing a weighted sum of values output by a function applied to said axial cross-correlation values; assessing the presence of a watermark according to the detection score. Such method is particularly well adapted to the detection of disparity coherent watermark but is compliant with any watermarking technique. A device implementing the method is further disclosed. |
申请公布号 |
US2015010201(A1) |
申请公布日期 |
2015.01.08 |
申请号 |
US201414324161 |
申请日期 |
2014.07.05 |
申请人 |
THOMSON LICENSING |
发明人 |
BURINI Cesar;DOERR Gwenael;BAUDRY Severine |
分类号 |
G06T1/00;H04N13/00 |
主分类号 |
G06T1/00 |
代理机构 |
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代理人 |
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主权项 |
1. A method for assessing the presence of a watermark in a video, wherein said video comprises at least a sequence of frames, the method comprises for at least one frame among one of the sequences of frames:
computing a set of axial cross-correlation values, wherein each axial cross-correlation value corresponds to a correlation between said frame and a reference watermark shifted along a spatial horizontal axis; obtaining a detection score by computing a weighted sum of values output by a function applied to said axial cross-correlation values; assessing the presence of a watermark according to the detection score. |
地址 |
Issy de Moulineaux FR |