Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorYasuo Kamei
Life of this patent
Estimating the term…
Abstract
An image forming apparatus includes a measurement unit configured to emit light to a measurement target, and measure reflected light from the measurement target; a white reference plate disposed at a position opposed to the measurement unit; an image forming unit configured to form a measurement image on a sheet; and a calculation unit configured to, based on a measurement value of the white reference plate and a measurement value of the measurement image by the measurement unit, calculate a spectral reflectivity of reflected light from the measurement image. The calculation unit is configured to, after correcting a variation due to color change of the white reference plate with respect to the measurement value of the white reference plate, calculate the spectral reflectivity.
Claims20
An image forming apparatus comprising:
- a measurement unit configured to emit light to a measurement target, and measure reflected light from the measurement target;
- a white reference plate disposed at a position opposed to the measurement unit;
- an image forming unit configured to form a measurement image on a sheet;
- and
- a calculation unit configured to, based on a measurement value of the white reference plate and a measurement value of the measurement image by the measurement unit, calculate a spectral reflectivity of reflected light from the measurement image,
- wherein the calculation unit is configured to, after correcting a variation due to color change of the white reference plate with respect to the measurement value of the white reference plate, calculate the spectral reflectivity.
Dependencies are inferred from the claim text.