Image processing apparatus, image processing method, and non-transitory recording medium
AssigneeRicoh Company, Ltd.
InventorKeisuke TAKASHIMA
Life of this patent
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Abstract
An image processing apparatus includes a reading sensor to read an image, a black image providing object to provide a black image for calculating an amount of density fluctuation due to stray light, and circuitry to calculate the amount of density fluctuation based on a first black image and a second black image read by the reading sensor in states where a light source is turned on and off for the black image providing object, respectively, and correct the image read by the reading sensor using the amount of density fluctuation.
Claims9
An image processing apparatus comprising:
- a reading sensor to read an image;
- a black image providing object to provide a black image for calculating an amount of density fluctuation due to stray light;
- and
- circuitry configured to:
- calculate the amount of density fluctuation based on a first black image and a second black image read by the reading sensor in states where a light source is turned on and off for the black image providing object, respectively;
- and
- correct the image read by the reading sensor using the amount of density fluctuation.
An image processing method comprising:
- calculating an amount of density fluctuation based on a first black image and a second black image read by a reading sensor, respectively, in states where a light source is turned on and off for a black image providing object used for calculating the amount of the density fluctuation due to stray light;
- reading, with the reading sensor, an image used for performing density correction;
- and
- correcting the image read by the reading sensor using the amount of the density fluctuation.
A non-transitory recording medium storing a plurality of program codes which, when executed by one or more processors, causes the one or more processors to perform a method, the method comprising:
- calculating an amount of density fluctuation based on a first black image and a second black image read by a reading sensor, respectively, in states where a light source is turned on and off for a black image providing object used for calculating the amount of the density fluctuation due to stray light;
- reading, with the reading sensor, an image used for performing density correction;
- and
- correcting the image read by the reading sensor using the amount of the density fluctuation.
Dependencies are inferred from the claim text.