Reading device, image forming apparatus including same, and reading method
AssigneeRicoh Company, Ltd.
InventorsMasamoto Nakazawa, Tadaaki Oyama, Masahiro Itoh, Masato Tanaka
Life of this patent
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Abstract
A reading device includes an imaging element and correcting circuitry. The imaging element is configured to receive light from an object selectively irradiated with visible light or invisible light. The correcting circuitry is configured to apply correction processing based on a difference in an optical characteristic between an invisible light region and a visible light region to an image signal in the invisible light region output from the imaging element and output the image signal corrected.
Claims30
A reading device, comprising:
- an imaging element configured to receive light from an object selectively irradiated with visible light or invisible light;
- and
- correcting circuitry configured to
- apply correction processing to an image signal to correct the image signal, based on a difference in an optical characteristic of the object between an invisible light region and a visible light region of the object, the image signal being a signal in the invisible light region and output from the imaging element, and
- output the corrected image signal.
A reading device configured to receive and read, with an imaging element, light from an object irradiated with light by a light source, the reading device comprising:
- correcting circuitry configured to individually set a first reading density range of the object used in a first reading operation for executing correction using first reference data for first data of the object read in a visible light region, and a second reading density range used in a second reading operation for executing the correction using second reference data for second data of the object read in an invisible light region.
A reading method, comprising:
- applying correction processing to an image signal to correct the image signal, based on a difference in an optical characteristic of an object between an invisible light region and a visible light region of the object, the image signal being a signal in the invisible light region and output from an imaging element configured to receive light from the object, which is selectively irradiated with visible light or invisible light;
- and
- outputting the corrected image signal.
A reading method for a reading device configured to receive and read, with an imaging element, light from an object irradiated with light by a light source, the reading method comprising:
- individually setting a first reading density range of the object used in a first reading operation for executing correction using first reference data for first data of the object read in a visible light region, and a second reading density range used in a second reading operation for executing the correction using second reference data for second data of the object read in an invisible light region.
A non-transitory recording medium storing computer-readable program code that, when executed by one or more processors, causes the processors to perform:
- applying correction processing to an image signal to correct the image signal, based on a difference in an optical characteristic of an object between an invisible light region and a visible light region of the object, the image signal being a signal in the invisible light region and output from an imaging element configured to receive light from the object, which is selectively irradiated with visible light or invisible light;
- and
- outputting the corrected image signal.
A non-transitory recording medium storing computer-readable program code that causes a reading device to perform a reading method, the reading device configured to receive and read, with an imaging element, light from an object irradiated with light by a light source, the reading method comprising:
- individually setting a first reading density range of the object used in a first reading operation for executing correction using first reference data for first data of the object read in a visible light region, and a second reading density range used in a second reading operation for executing the correction using second reference data for second data of the object read in an invisible light region.
Dependencies are inferred from the claim text.