Steganographic encoding and decoding
First Claim
1. In a digital watermark encoder, a method of encoding auxiliary information in imagery comprising:
- using a programmed electronic processor, analyzing data representing the imagery to determine whether a color value comprises color saturation;
adjusting the data representing the imagery to adjust the color saturation into a linear region, said adjusting yielding adjusted data;
encoding the auxiliary information in the adjusted data, said encoding adapted to an anticipated watermark detection.
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Abstract
This patent document relates generally to steganography and digital watermarking. One claim recites an apparatus comprising: electronic memory for buffering samples corresponding to imagery; and a programmed processor. The processor is programmed for: analyzing the samples corresponding to the imagery to determine whether a color value comprises color saturation; adjusting the samples to adjust the color saturation into a linear region, the adjusting yielding adjusted samples; encoding the auxiliary information in the adjusted samples, said encoding adapted to an anticipated watermark detection. Of course, other claims and combinations are provided too.
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Citations
21 Claims
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1. In a digital watermark encoder, a method of encoding auxiliary information in imagery comprising:
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using a programmed electronic processor, analyzing data representing the imagery to determine whether a color value comprises color saturation; adjusting the data representing the imagery to adjust the color saturation into a linear region, said adjusting yielding adjusted data; encoding the auxiliary information in the adjusted data, said encoding adapted to an anticipated watermark detection. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus comprising:
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electronic memory for buffering samples corresponding to imagery; a processor programmed for; analyzing the samples corresponding to imagery to determine whether a color value comprises color saturation; adjusting the samples corresponding to imagery to adjust the color saturation into a linear region, the adjusting yielding adjusted samples; encoding the auxiliary information in the adjusted samples, said encoding adapted to an anticipated watermark detection. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An apparatus comprising:
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electronic memory for buffering samples corresponding to imagery; means for analyzing the samples conesponding to imagery to determine whether a color value comprises color saturation; means for adjusting the samples conesponding to imagery to adjust the color saturation into a linear region, the adjusting yielding adjusted samples; means for encoding the auxiliary information in the adjusted samples, the encoding adapted to an anticipated watermark detection. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification