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US 2024/0397007 A1Published application
Image reading apparatus for reading a document, and image forming system
AssigneeCanon Kabushiki Kaisha
InventorsSHUHEI HAMADA, SHOKI KIKUKAWA
Life of this patent
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Abstract
An image reading apparatus includes: a reading unit comprising a light source, a sensor configured to receive light reflected by a document and output an analog signal, and a converter configured to convert the analog signal into a digital signal, and a controller. The controller is configured to: control the reading unit to perform a plurality of readings of the document; and change a reading condition of the reading unit so that a value of a first digital signal to be acquired in a first reading among the plurality of readings and a value of a second digital signal to be acquired in a second reading among the plurality of readings differ from one another.
Claims17
An image reading apparatus that reads a document, comprising:
- a reading unit comprising:
- a light source configured to emit light to the document;
- a sensor configured to receive the light reflected by the document and output an analog signal based on a light reception result of the reflected light;
- and
- a converter configured to convert the analog signal output by the sensor into a digital signal, and output the digital signal obtained as a result of the conversion by the converter, and
- a controller configured to:
- control the reading unit to perform a plurality of readings of the document;
- and
- change a reading condition of the reading unit so that a value of a first digital signal to be acquired in a first reading among the plurality of readings and a value of a second digital signal to be acquired in a second reading among the plurality of readings differ from one another.
6 more elements
An image forming system comprising:
- an image reading apparatus configured to read a document;
- an image forming apparatus configured to output a test printed object by forming an image on a sheet based on first image data of a reference printed object;
- and
- a processing apparatus configured to generate second image data to be used for image forming by the image forming apparatus, the second image data being generated based on a first read image signal obtained as a result of the image reading apparatus reading the test printed object and a second read image signal obtained as a result of the image reading apparatus reading the reference printed object,
- wherein the image reading apparatus comprises:
- a reading unit comprising a light source that is configured to emit light to the document, a sensor that is configured to receive the light reflected by the document and output an analog signal based on a light reception result of the reflected light, and a converter that is configured to convert the analog signal output by the sensor into a digital signal, the reading unit being configured to output the digital signal obtained as a result of the conversion by the converter;
- and
- a controller configured to:
- control the reading unit to perform a plurality of readings of the document;
- and
- change a reading condition of the reading unit so that a value of a first digital signal to be acquired in a first reading among the plurality of readings and a value of a second digital signal to be acquired in a second reading among the plurality of readings differ from one another.
8 more elements
An image forming system comprising:
- an image reading apparatus configured to read a document;
- and
- an image forming apparatus configured to output a color adjustment chart by forming an image on a sheet based on image data of the color adjustment chart,
- wherein the image forming apparatus controls an image forming condition based on a read image signal obtained as a result of the image reading apparatus reading the color adjustment chart formed on the sheet, and
- the image reading apparatus comprises:
- a reading unit comprising a light source that is configured to emit light to the document, a sensor that is configured to receive the light reflected by the document and output an analog signal based on a light reception result of the reflected light, and a converter that is configured to convert the analog signal output by the sensor into a digital signal, the reading unit being configured to output the digital signal obtained as a result of the conversion by the converter;
- and
- a controller configured to:
- control the reading unit to perform a plurality of readings of the document;
- and
- change a reading condition of the reading unit so that a value of a first digital signal to be acquired in a first reading among the plurality of readings and a value of a second digital signal to be acquired in a second reading among the plurality of readings differ from one another.
8 more elements
Dependencies are inferred from the claim text.