An image reading device having a mark formed on front and back of a sheet by an image forming device, and including a first scanner which reads the mark and a second scanner provided at a downstream side of the first scanner and which reads the mark, includes: a position adjusting unit configured to adjust front and back positions of the mark on the basis of a print position of the mark read by at least one of the first scanner and the second scanner; and a monitoring unit configured to monitor front and back misregistration of the mark on the basis of the front and back positions of the mark adjusted by the position adjusting unit.

A document reading device includes: a conveying unit configured to convey a document; a background member having a mark for correcting an inclination of the document; a color reading unit configured to read an image of the document and to output color image data; a monochrome reading unit configured to read the image of the document and to output monochrome image data; a switching unit configured to switch between a first state and a second state; and a hardware processor configured to switch into the first state at the time of a color mode, and to switch into the second state at the time of the monochrome mode, configured to detect the inclination of the document, and configured to correct the inclination of the color image data, and to correct the inclination of the monochrome image data, in accordance with the detected inclination of the document.

An image reading apparatus including: a conveyance path; a light transmitting member; a first reading unit; a second reading unit; a first roller disposed opposite to the first reading unit; a second roller disposed opposite to the second reading unit; a holding member configured to hold the first roller and the second roller; a plurality of first abutment portions provided on both end portion sides in a width direction of the first roller and forming a gap between the light transmitting member and the first roller by abutting on the light transmitting member; a plurality of second abutment portions provided on both end portion sides in the width direction of the second roller and forming a gap between the light transmitting member and the second roller by abutting on the light transmitting member; and an urging member urges the holding member against the light transmitting member.

Provided is an image reading system capable of improving the image quality of a document in which text and images are mixed in the same page. A camera captures a document in page units to obtain captured image data. A document reading unit is an image scanner having a higher resolution than the camera. An area classifying unit classifies the captured image data captured by the camera into areas for each content. An area selecting unit selects, for each classified area, whether to output captured image data based on the area classification and the state of the captured image data. An image processing unit processes the captured image data or the scanned image data for each area, and outputs or deletes the data as area data. The document output unit collects the processed area data, reconstructs the data into document data, and outputs the document data.

An upper unit includes a feed tray configured to support a document to be fed such that the document is inclined, a transport path configured to reverse the document fed in a direction having a vertically downward component by a feed tray in a direction having a vertically upward component, a first reader disposed on the transport path, and a discharge tray configured to support the discharged document such that the document is inclined. A lower unit includes a document positioning plate on which a document is mounted, and includes a second reader disposed vertically below the document positioning plate and configured to read the document mounted on the document positioning plate. A portion of the first reader and a portion of the document positioning plate overlap when viewed from vertically above.

A recording-material-transporting apparatus includes: a transport unit that transports a recording material and causes the recording material to pass through an upstream location and a downstream location that is positioned downstream of the upstream location in a recording-material-transporting direction in which the recording material is transported; an upstream reader including a light receiver that receives light reflected by the recording material, the upstream reader reading an image that is formed on a portion of the recording material positioned at the upstream location and that is formed on one surface of the recording material; and a downstream reader including a light receiver that receives light reflected by the recording material, the downstream reader reading an image that is formed on a portion of the recording material positioned at the downstream location and that is formed on other surface of the recording material. The light receiver of the upstream reader is positioned downstream of the upstream location in the recording-material-transporting direction, and/or the light receiver of the downstream reader is positioned upstream of the downstream location in the recording-material-transporting direction.

An upper unit includes a feed tray configured to support a document to be fed such that the document is inclined, a transport path configured to reverse the document fed in a direction having a vertically downward component by a feed tray in a direction having a vertically upward component, a first reader disposed on the transport path, and a discharge tray configured to support the discharged document such that the document is inclined. A lower unit includes a document positioning plate on which a document is mounted, and includes a second reader disposed vertically below the document positioning plate and configured to read the document mounted on the document positioning plate. A portion of the first reader and a portion of the document positioning plate overlap when viewed from vertically above.

Provided is an image reading system capable of improving the image quality of a document in which text and images are mixed in the same page. A camera captures a document in page units to obtain captured image data. A document reading unit is an image scanner having a higher resolution than the camera. An area classifying unit classifies the captured image data captured by the camera into areas for each content. An area selecting unit selects, for each classified area, whether to output captured image data based on the area classification and the state of the captured image data. An image processing unit processes the captured image data or the scanned image data for each area, and outputs or deletes the data as area data. The document output unit collects the processed area data, reconstructs the data into document data, and outputs the document data.

An image reading apparatus according to an embodiment includes an image reading unit configured to generate reference data by reading a reference surface and to generate image data by reading a sheet. A reference unit has a reference surface. A shading correction unit determines whether a portion of the reference surface includes a contaminant based on image data generated by the image reading unit reading the portion of the reference unit. When the portion of the reference surface is determined to not include a contaminant, the shading correction unit generates reference data based on the image data generated by the image reading unit reading the portion of the reference surface determined to not include a contaminant.

An image reading apparatus includes a common transport route, a first and a second transport route, a first and a second image sensor, a first and a second discharge tray, and a controller. The controller executes a first reading mode including guiding the document from the common transport route to the first transport route, reading the image on the first face of the document with the first image sensor, and discharging the document to the first discharge tray, or a second reading mode including reading the image on the second face of the document with the second image sensor, guiding the document from the common transport route to the second transport route, and discharging the document to the second discharge tray, inhibits the first reading mode, upon deciding that the first discharge tray is full, and inhibits the second reading mode, upon deciding that the second discharge tray is full.