Digital watermarking apparatus and methods

Details Digital watermarking apparatus and methods Digital watermarking apparatus and methods

2007-01-16

2007-01-16

Couso, Jose L. (Department: 2624)

Image analysis

Applications

Reexamination Certificate

active

11060919

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.

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