Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2006-02-28
2006-02-28
Patel, Kanjibhai (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S003300, C382S100000
Reexamination Certificate
active
07006256
ABSTRACT:
A watermarked image generator includes a watermark data source that inputs watermark data to a watermark embedding device. The watermark embedding device halftones the input image to generate the output image made of 2×2 binary patterns, the 2×2 binary patterns forming the watermarks embedded in the output image. The watermark embedding device includes a tri-level error diffusion generator that performs tri-level error diffusion on the input image by halftoning the input image into black, white and 50% gray. A plurality of halftoning circuits successively replace each pixel of the halftoned input image with one of a plurality of the 2×2 binary patterns. The one of the plurality of 2×2 binary patterns corresponds to at least one respective bit of the watermark data when a pixel of the halftoned image data is 50% gray. The watermark data can be segmentation map data of the input image.
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Cheng Hui
Fan Zhigang
Lin Ying-wei
Wang Shen-ge
Oliff & Berridg,e PLC
Patel Kanjibhai
Tabatabai Abolfazl
Xerox Corporation
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