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US 8,411,337 B2Granted
Image forming apparatus and image forming method
AssigneeCanon Kabushiki Kaisha
InventorRyousuke Suzuki
Life of this patent
Estimating the term…
Abstract
A step and non-uniformity in density in a drawing object due to an offset for an electrical color-shift correction are reduced. An image forming apparatus includes: a unit for determining a changing coordinate in a main scanning direction for correcting a color shift; a unit for detecting a closed region lying across the determined changing coordinate, from a drawing object; and a unit for performing a changing by using the determined changing coordinate without changing a shape of the detected closed region.
Claims6
An image forming apparatus comprising:
- a unit for determining a changing coordinate in a main scanning direction for correcting a color shift in a sub scanning direction on the basis of a shift amount of the color shift, the color shift expected to occur in image formation of a generated image;
- a unit for detecting a closed region from a drawing object based on which the image is formed, the closed region lying across the determined changing coordinate and formed of a plurality of neighboring color pixels;
- and
- a unit for performing a changing by using the determined changing coordinate without changing a shape of the detected closed region.
1 more element
An image forming method comprising the steps of:
- determining a changing coordinate in a main scanning direction for correcting a color shift in a sub scanning direction on the basis of a shift amount of the color shift, the color shift expected to occur in image formation of a generated image;
- detecting a closed region from a drawing object based on which the image is formed, the closed region lying across the determined changing coordinate and formed of a plurality of neighboring color pixels;
- and
- performing a changing by using the determined changing coordinate without changing a shape of the detected closed region.
1 more element
Dependencies are inferred from the claim text.