Digital watermarking apparatus and methods
AssigneeDigimarc Corporation
InventorsTrent J. Brundage, Tony F. Rodriguez, Brett T. Hannigan
Life of this patent
Estimating the term…
Abstract
The present invention relates to various steganographic methods and apparatus. In one embodiment, a plurality of microlenses can provide a steganographic signal for a handheld device. The pattern corresponds to (or conveys) a device identifier. In another embodiment, a handheld computing device includes: a plurality of pixel elements; a set of microlenses; and electronic circuitry communicating with the set of microlenses. The set of microlenses are arranged to create a pattern, the pattern providing a plural-bit identifier. The electronic circuitry operates to change the unique identifier. Other embodiments are also provided.
Claims15
A handheld computing device comprising:
- a plurality of pixel elements;
- and
- a set of microlenses, wherein each microlens in the set of microlenses corresponds with a pixel element, wherein the microlenses are arranged to create a pattern, the pattern including a steganographic plural-bit identifier associated with the device.
A handheld computing device comprising:
- a plurality of pixel elements;
- a set of microlenses, wherein the set of microlenses are arranged to create a pattern, the pattern providing a plural-bit identifier;
- and
- electronic circuitry communicating with the set of microlenses, wherein the electronic circuitry operates to change the unique identifier.
A handheld computing device comprising:
- a plurality of pixel elements;
- and
- a set of microlenses, wherein each microlens in the set of microlenses corresponds with a pixel element, wherein the microlenses are arranged to create a pattern, the pattern providing a plural-bit identifier associated with the device,
- wherein the device comprises a cell phone.
A handheld device comprising:
- an image sensor array comprising a plurality of pixel elements;
- and
- a plurality of lenses, wherein the plurality of lenses are arranged to provide a steganographic, plural-bit identifier.
A handheld device comprising:
- an image sensor array comprising a plurality of pixel elements;
- a plurality of lenses, wherein the plurality of lenses are arranged to provide a steganographic signal;
- and
- electronic circuitry to energize at least some of the lenses, wherein energizing at least some of the lenses changes the steganographic signal.
Dependencies are inferred from the claim text.