Apparatus and method for embedding electronic watermark

Details Apparatus and method for embedding electronic watermark Apparatus and method for embedding electronic watermark

2011-04-05

2011-04-05

Lu, Tom Y (Department: 2624)

Image analysis

Applications

Reexamination Certificate

active

07920715

ABSTRACT:
An electronic watermark embedding apparatus for embedding watermark information as digital information into a document image includes a background eliminating unit that determines whether pixels on an input image are pixels composing a background image and eliminates the pixels determined as the pixels composing the background image from the input image, and a watermark embedding unit that embeds a watermark into a background eliminated image from which the background is eliminated by the background eliminating unit so as to form a watermark image. A readable watermark can be embedded into a multi-valued image including a halftone/gradation portion on the background of the input image.

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