Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorYoichiro Maebashi
Life of this patent
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Abstract
An image forming apparatus includes a coordinate converter that corrects an image position in one pixel unit by converting a coordinate, a gradation value converter that corrects the image position in less-than-one pixel unit by converting a gradation value, an image outputting unit that forms a detection toner image including an intermediate gradation pixel onto an image bearing member that can bear a toner image, and a light reflection characteristic detector that detects a light reflection characteristic of the detection toner image. The gradation value converter is adjusted in accordance with a detection output of the light reflection characteristic detector.
Claims8
An image-forming apparatus configured to adjust a slope of an image in image information, the image-forming apparatus comprising:
- a first converter that corrects at least one image slope in one pixel units by converting a coordinate of the image;
- a second converter that corrects at least one image slope in less-than-one pixel units in a boundary where the first converter converts the coordinate of the image in one pixel units in a sub-scanning direction by changing, at each main-scanning position, gradation values to be assigned to a plurality of pixels at a same main-scanning position in the sub-scanning direction;
- an image-forming device that forms at least one toner image onto an image bearing member on a basis of image information corrected by the first converter and the second converter;
- a controller configured to form a test toner image including an intermediate gradation pixel using the image-forming device;
- a detector that detects a light reflection characteristic of the test toner image that is formed by the image-forming device;
- and
- an adjuster that adjusts gradation values to be assigned to a plurality of pixels at a same main-scanning position in the sub-scanning direction in accordance with an output of the detector.
Dependencies are inferred from the claim text.