Image reading device, image forming apparatus, and reading-unit install method
AssigneeRicoh Company, Ltd.
InventorHajime Tsukahara
Life of this patent
Estimating the term…
Abstract
An adjusting unit adjusts an output level of digital data converted from image data, based on a correction coefficient for each color. A color correction unit performs a color-correction process of correcting a fluctuation of adjusted output level based on a color-correction parameter that differs from one image reading device to another. The correction coefficient is generated before a reading unit is installed in the image reading device such that the output level becomes a predetermined value when reading the original document without the color-correction process, and then adjusted without the color-correction process at a time of installing the reading unit.
Claims11
An image reading device comprising:
- a reading unit that reads an original document and outputs image data of the original document;
- and
- an image processing unit that processes the image data output from the reading unit, wherein
- the reading unit includes
- an optical unit that irradiates the original document with a light, and receives a reflected light from the original document,
- a converting unit that converts image data obtained from the reflected light into digital data,
- an adjusting unit that adjusts an output level of the digital data based on a correction coefficient for each color, and
- a color correction unit that performs a color-correction process of correcting a fluctuation of adjusted output level based on a color-correction parameter that differs from one image reading device to another, and
- the correction coefficient is generated before the reading unit is installed in the image reading device such that the output level becomes a predetermined value when the reading unit reads the original document without the color-correction process, and then adjusted without the color-correction process at a time when the reading unit is installed in the image reading device.
An image forming apparatus comprising:
- a reading unit that reads an original document and outputs image data of the original document;
- and
- an image processing unit that processes the image data output from the reading unit, wherein
- the reading unit includes
- an optical unit that irradiates the original document with a light, and receives a reflected light from the original document,
- a converting unit that converts image data obtained from the reflected light into digital data,
- an adjusting unit that adjusts an output level of the digital data based on a correction coefficient for each color, and
- a color correction unit that performs a color-correction process of correcting a fluctuation of adjusted output level based on a color-correction parameter that differs from one image forming apparatus to another, and
- the correction coefficient is generated before the reading unit is installed in the image forming apparatus such that the output level becomes a predetermined value when the reading unit reads the original document without the color-correction process, and then adjusted without the color-correction process at a time when the reading unit is installed in the image forming apparatus.
A method of installing a reading unit irradiates an original document with a light and receives a reflected light from the original document, converts image data obtained from the reflected light into digital data, adjusts an output level of the digital data based on a correction coefficient for each color, and performs a color-correction process of correcting a fluctuation of adjusted output level based on a color-correction parameter that differs from one image reading device to another, the method performed using an image reading device, comprising:
- first generating including generating the correction coefficient before the reading unit is installed in the image reading device such that the output level becomes a predetermined value when the reading unit reads the original document without the color-correction process;
- second generating including generating the color-correction parameter for each image reading device;
- installing the reading unit in the image reading device;
- and
- adjusting the correction coefficient without the color-correction process at a time when the reading unit is installed in the image reading device.
Dependencies are inferred from the claim text.