Image processing apparatus and color processing method
AssigneeCanon Kabushiki Kaisha
InventorKazushige Hatori
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Abstract
The invention provides an image processing apparatus comprising: forming means for forming a patch based on patch data on a medium; temperature measuring means for measuring the temperature of a white paper portion of a medium to obtain a white paper temperature; colorimetry means for obtaining a colorimetric value by measuring the color of the patch formed on the medium; estimation means for estimating a colorimetry temperature, which is the temperature of the patch at the time when the colorimetry means measures its color, based on the patch data and the white paper temperature; and correction means for correcting the colorimetric value based on the estimated colorimetry temperature.
Claims12
An image processing apparatus comprising:
- a forming unit configured to form a patch based on patch data on a medium;
- a temperature measuring unit configured to measure the temperature of a white paper portion of a medium to obtain a white paper temperature;
- a colorimetry unit configured to obtain a colorimetric value by measuring the color of the patch formed on the medium;
- an estimation unit configured to estimate a colorimetry temperature, which is the temperature of the patch at the time when the colorimetry unit measures its color, based on the patch data and the white paper temperature;
- and
- a correction unit configured to correct the colorimetric value based on the estimated colorimetry temperature.
A color processing method for an image processing apparatus comprising a forming unit for forming a patch on a medium, a temperature measuring unit for measuring the temperature of a formed patch, and a colorimetry unit for measuring the color of a patch, the method comprising:
- a forming step of forming, with a forming unit, a patch based on patch data on a medium;
- a temperature measuring step of measuring, with a temperature measuring unit, the temperature of a white paper portion of the medium to obtain a white paper temperature;
- a colorimetry step of obtaining, with a colorimetry unit, a colorimetric value by measuring the color of the patch formed on the medium;
- an estimation step of estimating a colorimetry temperature, which is the temperature of the patch at the time when its color is measured with the colorimetry unit, the estimation being based on the patch data and the white paper temperature;
- and
- a colorimetric value correction step of correcting the colorimetric value based on the estimated colorimetry temperature.
(canceled)
Dependencies are inferred from the claim text.