Image processing apparatus and control method thereof

Details Image processing apparatus and control method thereof Image processing apparatus and control method thereof

2011-08-09

2011-08-09

Park, Chan S (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S002100, C358S003220, C358S003300, C358S001110, C358S003270, C358S003240, C358S462000, C382S260000, C382S261000, C382S262000, C382S263000, C382S264000, C382S265000, C382S266000, C382S269000

Reexamination Certificate

active

07995243

ABSTRACT:
The invention distinguishes not only character areas and halftone dot areas in an image, but also makes highly accurate decisions concerning characters present in halftone dot areas. A decision signal generating unit generates a decision signal having luminance as a main component from a signal indicating inputted image data, and supplies the decision signal to a character decision unit, a halftone dot decision unit, and a character-in-halftone dot decision unit. The character decision unit generates data indicating whether a pixel of interest is inside a character image area. The halftone dot decision unit generates data indicating whether a pixel of interest is inside a halftone dot area. The character-in-halftone dot decision unit generates data indicating whether there is a character image inside the halftone dot area. Based on these three signals, an attribute flag generating unit generates attribute data of the pixel of interest.

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