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.

An image reading apparatus includes a control unit configured to detect occurrence or non-occurrence of multi-sheet feed of a medium based on a reception level signal output by a reception unit in accordance with the received ultrasonic wave. The control unit, after a tip of the medium reaches the positions of the reception unit in a transport path, when the reception level signal is below a predetermined threshold, causes the driving voltage to rise, when an amount of change in the reception level signal in accordance with the rise in the driving voltage is smaller than a reference amount of change, determines that multi-sheet feed is ongoing, and when the amount of change in the reception level signal in accordance with the rise in the driving voltage is greater than the reference amount of change, determines that multi-sheet feed is not ongoing.

An image processing apparatus includes a selection unit, a determination unit, and a control unit to set candidates to be selected by the selection unit. If determination unit determines that there is not a set of a size and an orientation of a document of which the orientation cannot be correctly determined, the control unit sets, as selection unit selection candidates, candidates of sets of sizes and orientations of a plurality of documents. If the determination unit determines that there is a set of a size and an orientation of a document of which the orientation cannot be correctly determined, the control unit sets, as selection unit selection candidates, candidates obtained by excluding the set of the size and the orientation of the document of which the orientation cannot be correctly determined from the candidates of the sets of the sizes and the orientations of the plurality of documents.

An information processing apparatus includes a processor configured to store an instruction to execute a first job by using a first setting, in a case in which the first setting is changed to a second setting different from the first setting when the first job is executed, store first setting information regarding the first setting and second setting information regarding the second setting in association with each other in a storage unit, and in a case in which an instruction for execution of a second job different from the first job is given by using the first setting of the first job, perform control to display the first setting and the second setting, which are stored in the storage unit, in association with each other.

An image reading device includes a reading unit, a background member, and processing circuitry. The reading unit includes alight source to emit light to a passage area through which an object passes and an imaging device to capture reflected light of the light emitted to generate a visible image and an invisible image. The background member is disposed opposite the light source across the passage area. The processing circuitry is configured to: detect a change in an image characteristic due to a change in an optical characteristic of the reading unit, in invisible images obtained by capturing of invisible marks on the background member; determine a correction amount of an image characteristic to be used for correcting an image of the object generated by the imaging device, based on the change in the image characteristic detected; and correct the image characteristic based on the correction amount determined.

An information processing apparatus is configured to perform information processing on a target. The information processing apparatus includes one or more processors; and one or more memories storing program instructions that cause the one or more processors to perform a plurality of processes, the plurality of processes including a first process of adding information to the target and a second process of obtaining the information; control each of the plurality of processes; and perform a correcting process of concurrently performing corrections with respect to the plurality of processes.

An image reading apparatus includes a light emitter to irradiate a document with light, a first light guide to guide the light reflected by the document, an output device to output a readout signal obtained from the light reflected and guided by the first light guide, a base to correct shading in the readout signal, and circuitry to output a scanned image in which the shading of the document in the readout signal is corrected, based on correction data obtained from the readout signal of the base output from the output device, control a timing at which the light emitter emits the light and a timing at which the output device outputs a signal, and heat the first light guide with the light emitted from the light emitter before the output device outputs the readout signal of each of the document and the base.

A reading apparatus includes a reading part that reads information of a document, a housing that accommodates the reading part, a document feeding port through which the document is fed, a cover member disposed on the housing to be displaced to an open position at which the document feeding port is open and a closed position at which the document feeding port is closed, a drive source that displaces the cover member to the open position and the closed position, a position detection mechanism that detects a position of the cover member, and a control part, wherein the control part is configured to displace the cover member to the closed position by the drive source when a time during which reading by the reading part is not performed exceeds a predetermined time, and the position detection mechanism detects that the cover member is at the open position.

An image reading apparatus acquires first image data of a background portion stored in advance and read by a reading unit, acquires second image data by reading the background portion, generates third image data by increasing resolution of the first image data and fourth image data by increasing resolution of the second image data, detects an amount of shift of an image sensor relative to a lens array in a predetermined direction by shifting a specific pixel range of the fourth image data relative to the third image data and comparing the specific pixel range with the third image data, and compares fifth image data obtained by shifting the fourth image data in accordance with the shift amount with the third image data, so as to determine whether each of pixels included in the fifth image data is a defective pixel having an abnormal value.

An image forming apparatus is operable at least in a first power state and in a second power state, in which electric power consumption in the second power state is less than electric power consumption in the first power state. The apparatus includes a detection unit formed by a plurality of elements disposed to detect the temperature of an object, and a control unit configured to control the image forming apparatus in such a way as to shift from the second power state to the first power state based on a detection result obtained by the detection unit at first timing and a detection result obtained by the detection unit at second timing.