Detection from two chrominance directions
First Claim
1. A detector apparatus comprising:
- memory for storing color image data comprising first color data and second color data, in which the first color data comprises digital watermarking including a first polarity and the second color data comprises the digital watermarking including a second polarity that is inversely related to the first polarity;
one or more processors programmed for;
weighting the first color data and the second color data so that the digital watermarking is emphasized while image content is de-emphasized when weighted first color data and weighted second color data are combined, in which said weighting aligns digital watermarking detection along a multi-axis direction;
detecting the digital watermarking from combined, weighted first color data and weighted second color data; and
outputting data corresponding to detected digital watermarking.
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Abstract
The present disclosure relates generally to signal processing, including processing digital watermarking. One claim recites a detector apparatus comprising: memory for storing data representing color image data comprising red color data and green color data, in which the red color data comprises digital watermarking including a first polarity and the green color data comprises the digital watermarking including a second polarity that is inversely related to the first polarity; means for selectively weighting the red color data and the green color data so that the digital watermarking is emphasized while image content is de-emphasized when weighted red color data and weighted green color data are combined; means for detecting the digital watermarking from combined, weighted red color data and weighted green color data; and more or more processors configured for outputting data corresponding to detected digital watermarking. Of course, different combinations and claims are provided too.
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Citations
17 Claims
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1. A detector apparatus comprising:
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memory for storing color image data comprising first color data and second color data, in which the first color data comprises digital watermarking including a first polarity and the second color data comprises the digital watermarking including a second polarity that is inversely related to the first polarity; one or more processors programmed for; weighting the first color data and the second color data so that the digital watermarking is emphasized while image content is de-emphasized when weighted first color data and weighted second color data are combined, in which said weighting aligns digital watermarking detection along a multi-axis direction; detecting the digital watermarking from combined, weighted first color data and weighted second color data; and outputting data corresponding to detected digital watermarking. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A detector apparatus comprising:
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memory for storing color image data comprising first color data and second color data, in which the first color data comprises signal encoding including a first polarity and the second color data comprises the signal encoding including a second polarity that is inversely related to the first polarity, and in which the first color data corresponds to a first multi-color axis, and the second color data corresponds to a second multi-color axis; one or more processors configured for; combining the first color data and the second color data by subtracting the second color data and the first color data, the subtracting emphasizing the signal encoding while de-emphasizing image content; detecting the signal encoding from the combined first color data and second color data; and controlling output of data corresponding to detected signal encoding. - View Dependent Claims (10, 11, 12)
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13. A detector apparatus comprising:
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memory for storing color image data comprising first color data and second color data, in which the first color data comprises signal encoding including a first polarity and the second color data comprises the signal encoding including a second polarity that is inversely related to the first polarity; means for weighting the first color data and the second color data so that the digital watermarking is emphasized while image content is de-emphasized when weighted first color data and weighted second color data are combined, in which said means for weighting aligns signal encoding detection along a multi-axis direction; means for detecting the signal encoding from combined, weighted first color data and weighted second green data; and one or more processors configured for outputting data corresponding to detected signal encoding. - View Dependent Claims (14, 15, 16, 17)
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Specification