A document reading apparatus includes a stacking portion on which a plurality of documents are stacked, a feeding unit configured to feed the plurality of documents in a feeding direction, a reading unit configured to read the documents, a drive source configured to drive the feeding unit, and a control unit configured to execute a mode in which the plurality of documents having different sizes are fed by the feeding unit and read by the reading unit. The control unit is configured to control the drive source in the mode such that the feeding unit feeds a first document at a first feeding speed, and the feeding unit feeds a second document following the first document at a second feeding speed higher than the first feeding speed in a case where the width of the first document is larger than a predetermined width.

A medium conveying apparatus includes a conveying roller to convey a medium, an imaging device to generate an input image acquired by imaging the conveyed medium, and a processor to extract edge pixels from the input image, detect a degree of roundness at a corner of the medium in the input image based on the edge pixels, determine whether the conveyed medium is an ID card based on the degree of roundness, and control the conveying roller based on a result of the determination or outputs the result of the determination.

An image forming apparatus includes an original reading unit; an image forming unit, an image data sending unit; and a mode setting unit for setting one of original reading modes including a first original reading mode for the original reading unit to read originals of the same size, and a second original reading mode for the original reading unit to read originals of different sizes; and a control unit for controlling the original reading unit and the image forming unit so as to execute a copy job including the original reading process and the image forming process, and a sending job including the original reading process and the sending process. The mode setting unit is capable of independently setting, for the copy job and the sending job, a default value indicating the first original reading mode or the second original reading mode.

An automatic document feeder includes a document loading detector, a document feeder, a document guide, a guide width measurer, a document width acquirer, a guide shift determiner, a document skew detector, a skew determiner, a warning display information generator, and a display. When a detected skew of a document is determined to be unallowable, the document feeder stops a feeding of the document. The warning display information generator generates a warning content about a feed trouble that stopped the feeding of the document, and the generated warning content about the feed trouble is displayed on the display.

An image reading apparatus includes a reading processing unit that acquires image data including an image of a document placed on a document placement unit. A first detection processing unit detects a first line image whose width or density exceeds a predetermined first threshold value from the image data. A second detection processing unit detects a rectangular area that is defined by the first line image, included in the image data, and satisfies a predetermined detection condition. A third detection processing unit detects a second line image whose width or density exceeds a second threshold value smaller than the first threshold value from the rectangular area. A fourth detection processing unit detects, as document areas of the respective documents, the rectangular area not divided by the second line image and divided areas included in the rectangular area divided by the second line image.

An image reading apparatus includes a stacking tray, a feeding roller, a restricting member configured to move to a restricting position and a retracted position, a reading sensor, a reversing roller configured to perform a reversing operation, a first conveyance path, a second conveyance, and a controller. The controller is configured to permit the reversing operation if the controller receives an execution instruction of a double-sided reading job on a sheet having a first size, and prohibit the reversing operation if the controller receives an execution instruction of the double-sided reading job on a sheet having a second size smaller than the first size.

Implemented are a control apparatus, a control method, and a storage medium that enable efficient setting of poster printing. To this end, a control apparatus of the present invention is a control apparatus that allows a printing apparatus to print multiple divided images, into which an input image is divided, on print media, including: a setting unit that sets the number of divisions of the input image based on user input; an obtaining unit that obtains a width of the print media; a determining unit that determines a print region width of each of the divided images based on at least the set number of divisions and the width of the print medium; and a display control unit that displays guide information indicating a dividing position on a preview screen of the input image based on at least the determined print region width of the divided image.

An image reading device includes a background member, an illumination unit opposed to the background member, and a reader. The illumination unit emits light to a recording medium having an image thereon. The reader receives a reflection from the recording medium to read the image. The background member has a facing surface that faces the recording medium. The facing surface includes a reference portion on a center portion in a width direction of the background member. The reference portion has a higher reflectance than an end portion of the facing surface in the width direction.

An image forming apparatus includes a conveyance part, an image forming part, a sheet detection sensor, a sensor unit, and a controller. The sheet detection sensor, in which a plurality of sensor blocks each with a plurality of sensor elements mounted thereon at specified intervals are arrayed in a sheet width direction, detects an edge position in the sheet width direction on a basis of scanning image data formed by reading of the sheet. The controller is enabled to execute a calibration of inserting, into the scanning image data, interpolation pixels for compensating an error between an edge position detected by the scanning image data and an actual edge position.

An edge detection unit is arranged in a conveying portion conveying a sheet and detects the edge of the sheet in the width direction perpendicular to the sheet conveying direction. A light source unit is arranged opposite the sheet. A detecting portion holder holds the edge detection unit and the light source unit. A conveying roller pair positions the sheet conveyed toward the edge detection unit. A unit housing houses the detecting portion holder and the conveying roller pair. The edge detection unit has a contact glass making contact with the sheet. The light source unit has a facing glass facing the contact glass. One glass out of the contact glass and the facing glass is inclined downward at a first angle with respect to the tangent line, which passes through the nip portion between the conveying roller pair, toward the downstream side in the sheet conveying direction.