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US 7,598,971 B2Granted
Color image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsHiroki Tezuka, Yoshiyuki Akiba, Hiroki Kitamura
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AssigneeCanon Kabushiki Kaisha
InventorsHiroki Tezuka, Yoshiyuki Akiba, Hiroki Kitamura
Estimating the term…
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.
A color image forming apparatus comprising:
A method of correcting misregistration in a color image forming apparatus, wherein the color image forming apparatus includes a plurality of image forming parts each of which forms an image;
Dependencies are inferred from the claim text.