Image analysis – Applications
Reexamination Certificate
2005-05-03
2005-05-03
Johns, Andrew W. (Department: 2621)
Image analysis
Applications
C348S465000
Reexamination Certificate
active
06888952
ABSTRACT:
An implementation of a technology is described herein for the protection of rights in the content of a video sequence. This technology further generally relates to a technology facilitating embedding imperceptible, de-synchronization-resistant watermarks in video sequence and facilitating detecting such watermarks. These watermarks are resistant against unintentional and intentional modifications. In particular, the watermarks are resistant to de-synchronization. In addition, the watermarks are perceptually invisible. The watermarks are hidden in the video so that flicker is minimized or eliminated. More specifically, this technology hides a watermark (of portions thereof) over one or more regions of successive frames. Each region has a center defined by a hash value. A watermark (of portions thereof) is encoded into the region in a “plateau” manner. The mark (of portions thereof) is fully encoded in the frames surrounding the region's center, but trail off towards the edges of the region. This abstract itself is not intended to limit the scope of this patent. The scope of the present invention is pointed out in the appending claims.
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Mihcak M. Kivanc
Venkatesan Ramarathnam
Johns Andrew W.
Lee & Hayes PLLC
Microsoft Corporation
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