Image processing apparatus, image forming apparatus, and...

Details Image processing apparatus, image forming apparatus, and... Image processing apparatus, image forming apparatus, and...

2008-05-27

2008-05-27

Poon, King Y. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S001900, C358S296000, C358S447000, C382S266000, C382S267000

Reexamination Certificate

active

07379210

ABSTRACT:
It is intended to provide an image processing apparatus capable of precisely discriminating a halftone dot region and a figure such as a character arranged on the halftone dot region and applying appropriate image processing to the halftone dot region and the character separately. An isolated point discriminating section detects presence of an isolated point and detects a size of the detected isolated point. A temporary halftone dot region discriminating section42determines a temporary halftone dot region by counting the number of isolated point signals detected. Thereby, a region where isolated points concentrate is regarded as a temporary halftone dot region. An isolated point magnifying section43magnifies the detected isolated point signal to its original size so as to determine a magnified isolated point region. A halftone dot region restricting section44takes an AND computation results of the temporary halftone dot region and the magnified isolated point region. Thereby, in the temporary halftone dot region, only a place where an isolated point actually exists is regarded as a halftone dot processing region. Accordingly, in case a character or the like exists on a halftone dot region, the character is not included in a halftone dot processing region.

REFERENCES:
patent: 5832141 (1998-11-01), Ishida et al.
patent: 2002/0126315 (2002-09-01), Nabeshima
patent: 8-181864 (1996-07-01), None

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