Image reading apparatus and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorShigeto Tanaka
Life of this patent
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Abstract
An image reading apparatus includes a tray on which a sheet is to be placed, a conveyance unit configured to convey the sheet placed on the tray, a platen on which a sheet is to be placed, a reading unit configured to read one of a first surface of the sheet conveyed by the conveyance unit and a first surface of the sheet placed on the platen, and a controller configured to control the image reading apparatus to execute, a first reading mode of reading, by the reading unit, a first surface of a sheet having a plurality of test images formed thereon, which is conveyed by the conveyance unit; and a second reading mode of reading, by the reading unit, the first surface of the sheet having the plurality of test images formed thereon, which is placed on the platen.
Claims15
An image reading apparatus comprising:
- a tray on which a sheet is to be placed;
- a conveyance unit configured to convey the sheet placed on the tray;
- a platen on which a sheet is to be placed;
- a reading unit configured to read one of a first surface of the sheet conveyed by the conveyance unit and a first surface of the sheet placed on the platen;
- and
- a controller configured to control the image reading apparatus to execute:
- a first reading mode of reading, by the reading unit, a first surface of a sheet having a plurality of test images formed thereon, which is conveyed by the conveyance unit;
- and
- a second reading mode of reading, by the reading unit, the first surface of the sheet having the plurality of test images formed thereon, which is placed on the platen,
- wherein the controller is configured to obtain a correction value for correcting a reading operation of reading, by the reading unit, the sheet conveyed by the conveyance unit, based on a first read image read by the first reading mode and a second read image read by the second reading mode.
An image reading apparatus comprising:
- a tray on which a sheet is to be placed;
- a conveyance unit configured to convey the sheet placed on the tray;
- a platen on which a sheet is to be placed;
- a reading unit configured to read one of a first surface of the sheet conveyed by the conveyance unit and a first surface of the sheet placed on the platen;
- and
- a controller configured to control the image reading apparatus to execute:
- a first reading mode of reading, by the reading unit, a first surface of a sheet having a plurality of test images formed thereon, which is conveyed by the conveyance unit;
- and
- a second reading mode of reading, by the reading unit, the first surface of the sheet having the plurality of test images formed thereon, which is placed on the platen,
- wherein the controller is configured to correct a conveying speed of the sheet conveyed by the conveyance unit, based on a first read image read by the first reading mode and a second read image read by the second reading mode, and control the reading unit to execute reading of a sheet conveyed at the corrected conveying speed.
An image forming apparatus comprising:
- a printer engine configured to form an image onto a sheet based on a predetermined image forming condition;
- a tray on which the sheet having the image formed thereon by the printer engine is to be placed;
- a conveyance unit configured to convey the sheet placed on the tray;
- a platen on which the sheet having the image formed thereon by the printer engine is to be placed;
- a reading unit configured to read one of a first surface of the sheet conveyed by the conveyance unit and a first surface of the sheet placed on the platen;
- and
- a controller configured to control the image forming apparatus to execute:
- a first reading mode of reading, by the reading unit, a first surface of a sheet having a plurality of test images formed thereon, which is conveyed by the conveyance unit;
- and
- a second reading mode of reading, by the reading unit, the first surface of the sheet having the plurality of test images formed thereon, which is placed on the platen,
- wherein the controller is configured to obtain a first correction value for correcting a reading operation of reading, by the reading unit, the sheet conveyed by the conveyance unit, based on a first read image read by the first reading mode and a second read image read by the second reading mode, and
- wherein the controller is configured to generate a second correction value for correcting the image forming condition, based on a read image obtained by reading, by the reading unit, the sheet conveyed by the conveyance unit after correction based on the first correction value has been performed.
Dependencies are inferred from the claim text.