Watermark detection using a propagation map
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United States of America Patent
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Aug 11, 2015
Grant Date -
Dec 6, 2012
app pub date -
Feb 7, 2011
filing date -
Feb 9, 2010
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Abstract
A method for detecting and selecting watermarking in video coding is provided that comprises accessing a list of possible watermarks; generating propagation maps of modifications to the video that would be caused by applying the respective watermarks; generating a detection region responsive to each respective propagation map that includes blocks within the propagation map that collectively rank highest with respect to a selected detection criteria compared to each other region within the propagation map; selecting a threshold metric for evaluating detection regions; and removing watermarks from the list responsive to a comparison of their detection regions with the threshold metric.
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