Information embedding device, information detecting device,...

Details Information embedding device, information detecting device,... Information embedding device, information detecting device,...

2005-05-27

2009-12-01

Tucker, Wesley (Department: 2624)

Image analysis

Applications

C382S176000

Reexamination Certificate

active

07627136

ABSTRACT:
An information embedding device is provided that embeds information in a document image having a character region therein. This information embedding device includes: a character region detecting unit that detects the character region from the document image; a character region dividing unit that divides the character region into a plurality of sub regions; and a feature quantity increasing/decreasing unit that performs an operation to increase or decrease a feature quantity with respect to each of the sub regions to a value that is determined from a pseudorandom number sequence in accordance with predetermined rules.

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