Canon Kabushiki Kaisha

Kaoru Hamada

Masato Furukawa

Seiji Shibaki

Yushi Oka

Satoshi Seki

Hidenori Sunada

Akiko Kanno

Asahiro Nakayoshi

Yohei Katto

Yumeng Zhang

Daisuke Akagi

Ryo Mikami

Shinichi Ikoma

An image reading apparatus includes a transparent member having a placement surface on which a document is to be placed, a reading unit configured to read an image of the document placed on the transparent member via the transparent member, and a reading mode in which an image of a document, placed in a holding member with a transparent portion, is read. The document to be read is placed in the holding member so as to be visible via the transparent portion and the holding member is placed on the placement surface with the transparent portion of the holding member in contact with the placement surface. A processor detects an edge in an image acquired by the reading unit in the reading mode, and to extract an image surrounded by an edge detected in an area surrounded by an edge corresponding to the holding member in the reading mode.

Image reading apparatus caused to read a holding member placed on a reading area, the holding member holding receipts and extracting edges of the receipts from a single read image

An image reading apparatus includes a conveyor configured to convey an original, a reader configured to read the original conveyed by the conveyor, a detector configured to detect an abnormal image generated in a read image of the original obtained by the reader, a correction processor configured to correct the abnormal image, an operation unit configured to receive a setting of an operation mode set by a user, and a controller. The controller is configured to, in a case where the detector detects the abnormal image, control the correction processor to correct the abnormal image in a case in which a first operation mode of continuing image reading is set, and stop conveyance of the original performed by the conveyor and give a notification of generation of the abnormal image in a case in which a second operation mode of interrupting the image reading is set.

Image reading apparatus and image reading method

Image reading apparatus comprising a processor configured to extract an edge in an area corresponding to a holding member as an edge of an image corresponding to the document

An image reading apparatus includes a conveyance unit and a reading unit. Based on read image data from the reading unit, a tilt amount of an edge of a document on a leading edge side in a conveyance direction in which the document is conveyed is decided. If the decided tilt amount exceeds a first threshold where a setting that performs document digitalization with respect to the image data, notification is given of information indicating that reading of the document for the document digitalization has failed. If the decided tilt amount is smaller than the first threshold, skew correction is executed for correcting the tilt amount based on the decided tilt amount with respect to the image data, and the document digitalization is executed with respect to the image data for which the skew correction has been executed.

Image reading apparatus indicating reading for OCR processing failure based on amount of document tilt

An original reading apparatus includes a reading unit, a pick-up roller, a feed roller, a conveyance roller, a conveyance motor, a clutch, and a controller unit to control the clutch and the conveyance motor such that the pick-up roller and the feed roller that receive a driving force from the conveyance motor rotate at a given rotation speed. The rotation speed is set to a first speed when reading an original having a first size at a first resolution, to a second speed higher than the first speed when reading an original having the first size at a second resolution lower than the first resolution, and to a third speed lower than the second speed, regardless of designation of the reading resolution, when reading an original having a second size smaller than the first size.

Original reading apparatus

An image reading apparatus includes: at least one processor configured to: set reading resolutions in a first and a second directions when reading an image of a document; determine an inclination amount of the document; correct an image to reduce the inclination amount; output image data indicative of an corrected image; and obtain information relating to a first direction length of the document. In a case where the first direction length of the document is less than a predetermined length and the processor outputs the image data indicative of the corrected image, whose resolution in the first direction is a first resolution and resolution in the second direction is a second resolution lower than the first resolution, the processor sets the reading resolution in the second direction to a third resolution higher than the second resolution.

Image reading apparatus and image forming apparatus

A reader CPU stops a lead motor in a case in which a discharge sensor cannot detect reaching of a leading edge part of an original D even though the original is conveyed by a first amount (L+L) or a second amount (L+L) which is smaller than the first amount from when a lead sensor detects the original, when a reader image processing portion (leading edge detection portion) cannot detect the leading edge part of the original from image data of a first face of the original.

An image forming apparatus temporarily stores, in an image memory, image data generated by a front surface reading unit and a back surface reading unit for reading images of a front surface and a back surface of an original respectively. A CPU of an image forming apparatus, at a time of starting a copy job, sets an output frequency of the image memory (transfer rate of image data) to a first frequency Fthat is lower than a second frequency F. The CPU sets the output frequency of the image memory to the second frequency Fwhen transfer of the image data of the first page which corresponds to the front surface of a first original completes.

Image forming apparatus with two-sided copying and variable image data transfer clock frequency

An image reading apparatus, including: a first distance detector configured to measure a first distance of the original conveyed after a sensor is changed from a first state detecting the original to a second state not detecting the original; a second distance detector configured to measure a second distance of the original conveyed after the second state is changed to the first state; and a controller configured to control a conveyor so that the conveyor starts a conveyance of a succeeding original when the second distance reaches a conveyance permission distance before the first distance reaches a hole detection distance and the conveyor stops the succeeding original when the second state is changed to the first state before the first distance reaches the hole detection distance, and thereafter starts the conveyance of the succeeding original when the first distance reaches the hole detection distance.

Image reading apparatus

Provided is an image reading apparatus for suppressing an image defect ascribable to shading correction using a white reference plate arranged at a position different from a reading position of an original. The image reading apparatus includes a reading unit configured to read an image from the original passing through the reading position, the white reference plate arranged such that a distance between the reading unit and the white reference plate is larger than the distance between the reading unit and the reading position, and a control system. The control system includes a memory for backup configured to store in advance correlation data representing a correlation between a reading result of the white reference plate obtained by the reading unit, and a reading result of a reference member having a uniform density and arranged at the reading position.

Image reading apparatus with shading correction

An image forming apparatus which is capable of reading an original, temporarily storing image data in a storage unit, and then transferring the image data to an image forming unit to improve FCOT in forming an image. A memory stores image data output from image reading units. An image forming unit forms an image on a recording medium based on the image data stored in the memory. A first memory output frequency in a first mode in which one side of an original is read and an image is formed on one side of a recording medium is lower than a second memory output frequency in a second mode in which both sides of an original are read and an image is formed both sides of a recording medium.

Image forming apparatus that improves FCOT

An image forming apparatus includes an image reader configured to perform image reading of a first original and perform image reading of a second original after reading of the first original, a printer configured to print a read image read by the image reader on a sheet, and a controller configured to control operation of the image reader and the printer. As to the first original, the controller is configured, in a case where the printer performs double-sided printing to print on both sides of a sheet, to start to print a read image of the first original before the image reading of the first original is completed, and as to the second original, the controller is configured, in a case where the printer performs double-sided printing to print on both sides of a sheet, to start to print a read image of the second original after the image reading of the second original is completed.

Image forming apparatus having double-sided printing and control method of the same

An image reading apparatus includes a first unit, a second unit that is pivotable against the first unit, and a controller. The first unit includes a platen, a member, and a movable first reader. The second unit includes an original tray, a conveyance unit that conveys an original from the original tray, a static second reader. The controller determines an opening/closing state of the second unit against the first unit based on read data obtained when the second reader reads the member. The first reader reads the first side of an original conveyed by the conveyance unit and the second reader reads the second side of the original when the original placed on the original tray is read. The first reader reads the first side while moving under the original when the original placed on the platen is read.

Image reading apparatus capable of determining opening-closing state of original conveyance device and image forming apparatus equipped with image reading apparatus

An image reading apparatus reads an original image of an original, which is conveyed along a conveyance path, using a scanner unit and a CCD sensor unit. A separation sensor, a lead sensor, and a sheet discharge sensor, which are provided to the conveyance path, detect occurrence of a jam. A restarting method for reading processing of the original after the occurrence of the jam includes a first restarting method of re-placing all of the originals, which have been fed, on an original tray and a second restarting method of re-placing only an unread original on the original tray, and is set by a user. In a case where the second restarting method is set, the restarting method is determined from any one of the first restarting method and the second restarting method based on a discharged length of the original having been discharged to a sheet discharge tray.

Growing community of inventors

Nagareyama, Japan

Kaoru Hamada