Image processing apparatus that performs black coloring,...

Details Image processing apparatus that performs black coloring,... Image processing apparatus that performs black coloring,...

2005-04-05

2005-04-05

Rogers, Scott A. (Department: 2626)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S002100, C358S003030, C358S518000, C358S521000, C382S252000

Reexamination Certificate

active

06876468

ABSTRACT:
A lower-bit replacement means of an information addition means replaces lower 3 bits of an 8-bit image signal with 3 bits of an image area separation signal, and outputs an 8-bit conversion image signal. A lower-bit extraction means of an information extraction means extracts lower 3 bits of the8-bit conversion image signal and outputs an image area separation signal as additional information. On the other hand, as regards image information, the conversion image signal input to the information extraction means is output as it is, as an image signal.

REFERENCES:
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patent: 5907370 (1999-05-01), Suzuki et al.
patent: 6598197 (2003-07-01), Peterson et al.
patent: 11-331586 (1999-11-01), None
patent: 2000228731 (2000-08-01), None
Koide et al.; “A Data Embedding Method for Bilevel Based on the Error Diffusion Method and the Mean Density Approximation Method”; 1996; pp. 7-14.

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