Detection from two chrominance directions
First Claim
1. A detector apparatus comprising:
- memory for storing data representing 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 in which the second color data comprises the signal encoding including a second polarity that is inversely related to the first polarity, the first polarity and the second polarity offsetting luminance attributable to the signal encoding;
one or more processors programmed for;
selectively weighting the first color data and the second color data so that the signal encoding is emphasized while image content is de-emphasized when weighted first color data and weighted second color data are combined;
detecting the signal encoding from combined, weighted first color data and weighted second color data; and
outputting data corresponding to detected signal encoding.
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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
24 Claims
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1. A detector apparatus comprising:
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memory for storing data representing 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 in which the second color data comprises the signal encoding including a second polarity that is inversely related to the first polarity, the first polarity and the second polarity offsetting luminance attributable to the signal encoding; one or more processors programmed for; selectively weighting the first color data and the second color data so that the signal encoding is emphasized while image content is de-emphasized when weighted first color data and weighted second color data are combined; detecting the signal encoding from combined, weighted first color data and weighted second color data; and outputting data corresponding to detected signal encoding. - 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 data representing 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 in which 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 programmed 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 outputting 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 data representing 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 signal encoding 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 encoded signal detection along a multi-axis color direction; means for detecting the signal encoding from combined, weighted first color data and weighted second color data; and more or more processors configured for outputting data corresponding to detected signal encoding. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A non-transitory computer readable medium comprising instructions stored thereon, that, when executed by a processor, causes the processor to perform the following:
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accessing data representing 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; weighting the first color data and the second color data so that the signal encoding 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 encoded signal detection along a multi-axis color direction; combining the weighted first color data and the weighted second color data by subtracting the weighted second color data from the weighted first color data, the combining yielding combined weighted first color data and weighted second color data; decoding a plural-bit identifier from the signal encoding within the combined weighted first color data and weighted second color data; and providing the plural-bit identifier as an output. - View Dependent Claims (21, 22, 23, 24)
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Specification