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.

Provided are systems and methods for identifying, isolating, and/or aligning sheets. An identification system can facilitate accurate identification of a sheet by (i) vacating one or more components of the system that are not the sheet from a zone of detection, and/or (ii) determining a reference axis of the sheet. An isolation system can facilitate accurate isolation of a sheet by (i) providing targeted air flow, and/or (ii) introducing a wave into the sheet. Identification systems and/or isolation systems described herein may facilitate isolation of sheets that were previously fastened together by one or more fasteners. An alignment system can facilitate accurate alignment of a first sheet at an upstream location relative to a second sheet at a downstream location via machine learning.

A reading device includes a reading sensor, a platen on which a first original and a second original being longer in a first direction can be placed, and a controller. the controller moves the reading sensor from an initial position to a standby position, causes the reading sensor to detect edges of the original while moving by a predetermined distance in the first direction, detect edges of the original while moving toward the initial position when a first edge in the first direction and a second edge in a second direction orthogonal to the first direction are detected or when neither of the edges are detected, detect edges while moving in a direction away from the initial position when the first edge is not detected and the second edge is detected, and acquire a content of the original while moving toward the initial position when the first edge is detected.

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.

Provided are a medium conveyance apparatus, control method, and control program is to enable more precisely detecting an end part in a main scan direction of a medium from an image. A medium conveyance apparatus includes a conveying module to convey a medium, an imaging device to capture an image of the conveyed medium, a storage device to store a low reliability region inside an input image of a medium captured by the imaging device based on a positional relationship between an imaging position of the imaging device and arrangement position of the conveying module, an edge pixel detection module to detect edge pixels from the input image, an end part detection module to detect an end part in a main scan direction of the medium based on edge pixels detected from a region not including the low reliability region inside the input image, and an output control module to output information relating to the detected end part.

A reading portion generates an original image including an image of a document sheet. A first document sheet end detection portion, in a case where the thickness of the document sheet is equal to or greater than a threshold value, identifies a peripheral edge shape of the document sheet by detecting a shadow portion that occurs at a peripheral edge portion of the document sheet in the original image. A second document end detection portion, in a case where the thickness of the document sheet is less than a threshold value, identifies the peripheral edge shape based on a specification by the user. A document sheet size determination portion determines a size of the document sheet according to a result of shape identification by the first document sheet end detection portion or a result of shape identification by the second document sheet end detection portion.

Methods and system are disclosed for a double-feed detector with neural network classifier. These includes accepting pages of a print-based media substrate into a scanning device with a paper feed device, back-illuminating the pages using a light source, capturing a page image of back-illuminated pages using an image capture device, detecting noise patterns exhibited by the page image using an image processor, classifying detected noise patterns using a noise pattern classifier, and determining, using classified detected noise patterns and a neural network controller for a neural network model, whether the at least one page is a sheet stack (at least two pages stacked together and passing through the paper feed device concurrently) based on the classified detected noise patterns. On condition a sheet stack is detected, a sheet stack detected signal triggers taking an action.

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.

An image reading apparatus acquires first control data regarding generation of first rectangular image data that includes a whole of a document area corresponding to a document within a reading area of read image data. The image reading apparatus acquires second control data regarding generation of second rectangular image data that does not include a background area not corresponding to the document within the reading area of the read image data and includes at least a part of the document area.

A multi-mode scanning device for scanning an original includes a non-transparent element, a first light source, a second light source and an optical module. The first light source outputs visible light to irradiate the non-transparent element and the original to generate first light and second light, respectively. The second light source outputs invisible light to irradiate a combination of the non-transparent element and the original to generate third light and fourth light. The optical module receives the first light, the second light, the third light and the fourth light and generates sensing signals representative of visible light information and invisible light information of the original. The original is disposed between the non-transparent element and the optical module. The first light source and the optical module are disposed on a same side of the non-transparent element.