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

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

2006-11-14

2006-11-14

Williams, Kimberly (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003260, C382S176000, C382S205000

Reexamination Certificate

active

07136194

ABSTRACT:
Disclosed are an image processing apparatus that can decrease such a misjudgment that an area including an extremely small-sized character is judged to be a halftone-dot area when a judgment of a halftone-dot area is performed based on a number of isolated pixels in a predetermined area, and an image forming apparatus that utilizes the image processing apparatus. An isolated pixel signal that is outputted from an isolated pixel detection unit and that indicates whether a target pixel corresponds to an isolated pixel is inputted into a filter processing unit. The filter processing unit corrects the isolated pixel signal based on whether the target pixel should be handled as an isolated pixel. A judgment is then performed as to whether an area including the target pixel is a halftone-dot area, based on a signal outputted from the filter processing unit.

REFERENCES:
patent: 6449060 (2002-09-01), Kawai et al.
patent: 05-153393 (1993-06-01), None
patent: 09-247436 (1997-09-01), None
patent: 11-266360 (1999-09-01), None
patent: 2000-287077 (2000-10-01), None
U.S. Appl. No. 09/369,176 “Halftone Dot Image Discrimination Method and Image Processing Device”.
U.S. Appl. No. 09/568,669 “Image Processing Apparatus, Image Processing Method and Coomputer Program Product for Image Processing”.

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