Image processing apparatus, image processing method,...

Details Image processing apparatus, image processing method,... Image processing apparatus, image processing method,...

2006-07-04

2006-07-04

Chau, Minh (Department: 2854)

Typewriting machines

Including control of format by programmed-control-system

C347S014000

Reexamination Certificate

active

07070346

ABSTRACT:
The image processing apparatus of the invention determines dot on-off state of respective pixels to create dots at a preset density corresponding to a tone value of image data and outputs data representing positions of dots to be created as control data to a printer. The printer creates dots according to the control data in synchronism with main scans and sub-scans of a print head to complete a printed image. The technique of the invention determines the dot on-off state according to the image data to have weighted dot distribution in a direction different from the scanning direction of the print head. Positional misalignment of dot formation generally occurs in the scanning direction of the print head. The weighted dot distribution in the direction different from the scanning direction of the print head thus does not significantly affect the resulting picture quality even in the event of some positional misalignment of dot formation and ensures a high-quality printed image.

REFERENCES:
patent: 4748453 (1988-05-01), Lin et al.
patent: 5684517 (1997-11-01), Clemente et al.
patent: 5923344 (1999-07-01), Norum et al.
patent: 6142598 (2000-11-01), Iwasaki et al.
patent: 6170932 (2001-01-01), Kanaya et al.
patent: 6547355 (2003-04-01), Shimada et al.
patent: 2000-261669 (2000-09-01), None
Abstract of Japanese Patent Publication No. 2000-261669, Pub. Date: Sep. 22, 2000, Patent Abstracts of Japan.

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