An image forming apparatus includes: a conveyor that transports a sheet; an image former that forms an image on front and back surfaces of the sheet being transported in a transportation path and forms marks on the front and back surfaces; a reader that comprises a first line sensor that is disposed on a front surface side and reads the front surface; and a second line sensor that is disposed on a back surface side and reads the back surface; and a controller that: calculates a positional deviation between the images formed on the front and back surfaces based on positions of the marks on the front surface read by the first line sensor and positions of the marks on the back surface read by the second line sensor, and controls the image former to adjust positions of the images formed on the front and back surfaces.

An image reading apparatus includes a reading unit and a controller. The reading unit reads a first image on a first surface of a sheet and a second image on a second surface of the sheet and generates first and second image data, respectively. The controller determines, based on the first and second image data, whether the first image is at a first edge of the first surface and the second image is at a second edge of the second surface of the sheet. The controller combines the first and second image data into combined image data corresponding to the first and second images if both the first image is at the first edge and the second image is at the second edge. The controller processes the combined image data such that a combined image corresponding to the combined image data has a predetermined size.

An image reading apparatus includes a reading unit and a controller. The reading unit reads a first image on a first surface of a sheet and a second image on a second surface of the sheet and generates first and second image data, respectively. The controller determines, based on the first and second image data, whether the first image is at a first edge of the first surface and the second image is at a second edge of the second surface of the sheet. The controller combines the first and second image data into combined image data corresponding to the first and second images if both the first image is at the first edge and the second image is at the second edge. The controller processes the combined image data such that a combined image corresponding to the combined image data has a predetermined size.

An image reading apparatus includes a first image reading unit, a second image reading unit provided on a side opposite from the first image reading unit with respect to a sheet feeding passage, a first guiding member, a second guiding member, a first unit holding the first image reading unit and the second guiding member, and a second unit holding the second image reading unit and the first guiding member. One of the first unit and the second unit is movable relative to the other unit so as to open the sheet feeding passage.

An image reading apparatus includes: a conveyance portion configured to convey a first medium; a first imaging portion; a first reading processing portion configured to cause the first imaging portion to read a first image of a first reading surface of the first medium conveyed by the conveyance portion; a second imaging portion; a second reading processing portion configured to cause the second imaging portion to read a second image of the second reading surface of the second medium by scanning while the second imaging portion is being moved along a second reading surface of a second medium placed on a medium placement surface; a reading control portion configured to control the first reading processing portion and the second reading processing portion to operate in parallel with each other; and a synthesis processing portion configured to generate a synthesized image by synthesizing the first image and the second image.

A reading device includes a first light source, a second light source, a first reading unit, a second reading unit, a comparison unit, and a correction unit. The first source irradiates an object to be read, with first light having a first transmittance to the object. The second source irradiates the object with second light having a second transmittance to the object. The first reading unit reads the first light from the object to output first image data. The second reading unit reads the second light from the object to output second image data. The comparison unit compares a data difference between the first and second image data. In a case where the data difference is equal to or larger than a threshold, the correction unit corrects data of an image area having the data difference equal to or larger than the threshold in the first or second image data.

A media scanner including an input tray, an output tray disposed above the input tray, a media feeder to advance media along a media path from the input tray to the output tray, an upper scanning device to generate a first scan line, and a lower scanning assembly. The upper scanning device is disposed to face downward to scan a first side of the media. The lower scanning assembly is disposed to face upward to scan a second side of the media. The media path extends from the input tray to below the upper scanning device, to above the lower scanning assembly, and to the output tray. The upper scanning device is disposed at an angle with respect to the media path to cause a front edge of the media advancing along the media path to contact the upper scanning device at or before the first scan line.

A set of program instructions, when executed by a controller of an information processing apparatus configured to communicate with an image scanner, causes the information processing apparatus to: display, on a display of the information processing apparatus, a scan result screen formed by alternately arranging a front-side image and a back-side image of a document scanned by the image scanner, the front-side image and the back-side image being received from the image scanner; perform at least insertion of an image of a newly-scanned document into a plurality of images displayed on the scan result screen, or deletion of an image included in the plurality of images displayed on the scan result screen; and in response to determining that the insertion or the deletion is performed, disable file separation, the file separation being separating a plurality of images displayed on the scan result screen into files.

A set of program instructions, when executed by a controller of an information processing apparatus configured to communicate with an image scanner, causes the information processing apparatus to: display, on a display of the information processing apparatus, a scan result screen formed by alternately arranging a front-side image and a back-side image of a document scanned by the image scanner, the front-side image and the back-side image being received from the image scanner; perform at least insertion of an image of a newly-scanned document into a plurality of images displayed on the scan result screen, or deletion of an image included in the plurality of images displayed on the scan result screen; and in response to determining that the insertion or the deletion is performed, disable file separation, the file separation being separating a plurality of images displayed on the scan result screen into files.

An image forming apparatus includes an image reading device, an image forming device, and a control device. The image reading device reads a source document image. The image forming device forms the source document image read by the image reading device, on a recording sheet. The control device includes a processor, and acts as a controller, when the processor executes a control program. The controller arranges a plurality of source document images sequentially read by the image reading device, in a consolidated form in an area corresponding to one recording sheet, and causes the image forming device to record the source document images on one recording sheet.