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US 6,430,302 B2Granted
Steganographically encoding a first image in accordance with a second image
AssigneeDigimarc Corporation
InventorGeoffrey B. Rhoads
Life of this patent
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Abstract
Multi-bit auxiliary information is hidden in imagery (e.g., digital photographs, video), using steganographic techniques. Such information can be used for various purposes, including identifying imagery as originating from a particular source, copy control, etc. In some embodiments, one image is encoded using data that is dependent on a second image.
Claims17
A steganographic image processing method comprising:
- receiving first and second digital images;
- transforming the second image into a noise-like image;
- determining scale data corresponding to said first image;
- and
- scaling the noise-like image in accordance with the scale data, and summing with the first digital image.
2 more elements
A steganographic image processing method comprising:
- receiving first and second digital images;
- steganographically encoding first data within the first digital image, the first data being dependent on the second digital image and being adaptively scaled in accordance with the first digital image so as to be better concealed therein.
A steganographic image processing method comprising:
- receiving first and second digital images, and a carrier signal;
- processing the second digital image in accordance with the carrier signal to produce a noise-like signal;
- and
- summing the noise-like signal with the first digital image.
1 more element
Dependencies are inferred from the claim text.