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

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

2006-08-29

2006-08-29

Rogers, Scott A. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003260, C358S462000, C358S463000, C382S176000, C382S194000, C382S199000, C382S275000

Reexamination Certificate

active

07099045

ABSTRACT:
Disclosed are an image processing apparatus and an image processing method that can decrease image quality deterioration caused by unsuitable image correction processing performed on a pixel in a halftone-dot area due to a misjudgment of an image type, and an image forming apparatus that utilizes the image processing apparatus. A characteristic of a halftone-dot area is judged by, for example, counting the number of isolated pixels detected by an isolated pixel detection filter with a predetermined size. A parameter such as a threshold for the number of inner edge pixels for use in a judgment of an edge area of a character that is present on a halftone-dot area is switched (between thresholds503and504), based on the characteristic of the halftone-dot area.

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U.S. Appl. No. 09/369,176—“Haltone dot Image Discrimination Method and Image Processing Device”.
U.S. Appl. No. 09/568,669—“Image Processing Apparatus, Image Processing Method and Computer Program Product for Image Processing”.

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