Watermarking of data invariant to distortion
First Claim
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1. A computer-implemented method comprising:
- electronically transforming a data set to a first domain in which data values are more invariant to distortion;
electronically transforming the data set from the first domain to a second domain that includes a set of expandable values, wherein transforming the data set from the first domain to the second domain comprises recursively transforming at least one difference value; and
modifying expandable values to include auxiliary data.
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Abstract
A data set is transformed to a domain in which values are robust to distortion. The values are then expanded to carry auxiliary data. To recover the data, the data set is transformed into the domain, further transformed to get a set of possibly expanded data, and then processed to extract auxiliary data from the expanded values.
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Citations
13 Claims
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1. A computer-implemented method comprising:
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electronically transforming a data set to a first domain in which data values are more invariant to distortion; electronically transforming the data set from the first domain to a second domain that includes a set of expandable values, wherein transforming the data set from the first domain to the second domain comprises recursively transforming at least one difference value; and modifying expandable values to include auxiliary data. - View Dependent Claims (3, 4, 5, 6)
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2. A non-transitory computer readable medium having instructions stored thereon, the instructions comprising:
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instructions to transform a data set to a first domain in which data values are more invariant to distortion; instructions to transform the data set from the first domain to a second domain that includes a set of expandable values, wherein transforming the data set from the first domain to the second domain comprises recursively transforming at least one difference value; and instructions to modify expandable values to include auxiliary data.
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7. A computer-implemented method comprising:
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electronically transforming a data set to a first domain in which data values are more invariant to distortion; electronically transforming the data set from the first domain to a second domain that includes a set of values, wherein transforming the data set from the first domain to the second domain comprises recursively transforming at least one difference value; identifying locations within the set of values that have attributes indicative of carrying auxiliary data through expansion; and extracting the auxiliary data from the set of values.
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8. A non-transitory computer readable medium having instructions stored thereon, the instructions comprising:
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instructions to transform a data set to a first domain in which data values are more invariant to distortion; instructions to transform the data set from the first domain to a second domain that includes a set of values, wherein transforming the data set from the first domain to the second domain comprises recursively transforming at least one difference value; instructions to identify locations within the set of values that have attributes indicative of carrying auxiliary data through expansion; and instructions to extract the auxiliary data from the set of values.
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9. A device comprising:
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a memory configured to store a data set; and a processor operatively coupled to the memory and configured to; transform the data set to a first domain in which data values are more invariant to distortion; transform the data set from the first domain to a second domain that includes a set of expandable values, wherein the processor transforms the data set from the first domain to the second domain by recursively transforming at least one difference value; and modify the expandable values to include auxiliary data. - View Dependent Claims (10, 11, 12)
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13. A device comprising:
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a memory configured to store a data set; and a processor operatively coupled to the memory and configured to; transform the data set to a first domain in which data values are more invariant to distortion; transform the data set from the first domain to a second domain that includes a set of values, wherein the processor transforms the data set from the first domain to the second domain by recursively transforming at least one difference value; identify locations within the set of values that have attributes indicative of carrying auxiliary data through expansion; and extract the auxiliary data from the set of values.
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Specification