Color image forming apparatus

Details Color image forming apparatus Color image forming apparatus

2006-06-01

2009-10-06

Tran, Huan H (Department: 2861)

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

C399S301000

Reexamination Certificate

active

07598971

ABSTRACT:
A color image forming apparatus includes a coordinate conversion part, which converts a ordinate value, for executing a misregistration correction in the unit of a pixel; a gradation conversion part, which converts a gradation level, for executing a misregistration correction in a unit less than a pixel; and a judgment part, which detects a feature of the image and judges whether or not to execute the misregistration correction in a unit less than a pixel by the gradation conversion part. The judgment part compares the gradation level in an object pixel and a pixel adjacent in a sub-scanning direction, thereby judging whether or not to execute the misregistration correction in a unit less than a pixel. Thus, the invention enables to distinguish an image to be subjected to the registration correction in a unit less than a pixel and an image not to be subjected to such correction in a simple manner and also in consideration of the image color.

REFERENCES:
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Computer-generated translation of JP 2005-010746 cited in the IDS filed on Jan. 5, 2007.
European Official Letter Search Report, dated Sep. 26, 2006, in European Application No. 06011940.1.

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