An image inspection apparatus includes: a light source configured to emit white light onto a test image formed on a paper sheet; an optical lens system configured to receive light reflected by the paper sheet, the reflected light being of the white light emitted from the light source; a separating unit configured to separate light having passed through the optical lens system; a reading unit configured to receive the separated light at the different wavelengths, and optically read the test image of the light; and a control unit configured to calculate edge blurs at a rising edge and a falling edge of each set of image data of the light obtained by the reading unit reading the test image, calculate widths of the test image, and determine the width calculated from the set of image data having the smallest edge blur to be the width of the test image.

An image reading apparatus includes a reading controller, a data generating circuit unit, a document holder, an opening/closing sensor which provides an output of a first level when the document holder is open by an angle equal to or more than a predetermined angle, and a storage unit which stores an adjustment value. Where a return is made from a power saving mode to an active mode, when an output level of the opening/closing sensor is the first level, the reading controller makes a setting for an operation of the data generating circuit unit based on the adjustment value stored in the storage unit, and then makes the reading unit perform reading for document size detection.

A position detection device includes a background member, a reader, and processing circuitry. The background member has a higher absorption characteristic in an invisible wavelength region than in a visible wavelength region. The reader opposite the background member irradiates a recording medium having a mark and the background member with light of a visible wavelength to output a visible image or with light of an invisible wavelength to output an invisible image. The processing circuitry is configured to: detect an end position of the recording medium and a position of the mark on the recording medium from a read image output from the reader; and select the visible or invisible image as the read image used for position detection, according to an absorption characteristic of a color material forming the mark read by the reader and an absorption characteristic of the recording medium in the invisible wavelength region.

A non-transitory computer-readable medium stores computer-readable instructions executable by a processor of an information processing device that includes a user interface and a display. The instructions are configured to, when executed by the processor, cause the information processing device to accept, via the user interface, an operation to specify a rearrangement condition for a plurality of pieces of image data to be obtained, obtain image data of a single sheet, determine an arrangement order for arranging first image data and second image data in accordance with the rearrangement condition specified by the accepted operation, the first image data being image data of one or more sheets obtained earlier than the second image data, the second image data being the image data of the single sheet, and display, on the display, images contained in the first image data and the second image data, to be arranged in the determined arrangement order.

A medium feeding apparatus includes a medium mounting section forming a mounting face for mounting a medium thereon, a feeding roller configured to feed a lowermost medium among mediums mounted on the medium mounting section in a feeding direction, and a movement detection unit configured to output information related to movement of the medium in a direction along the mounting face, wherein based on detection information detected by a medium height detection unit that outputs information related to a height of the medium mounted on the mounting section from the mounting face in abnormality detection processing, when the height is less than a first threshold value, a control unit continues feeding the medium regardless of detection information detected by the movement detection unit or without obtaining detection information detected by the movement detection unit.

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.

An image reading apparatus includes a conveyor configured to convey an original in a conveyance direction; a reader configured to read an image of the original conveyed by the conveyor; and at least one processor configured to: determine, based on the image read by the reader, an inclination amount corresponding to an inclination angle of a side of a leading edge of the original in the conveyance direction, wherein the inclination angle represents an inclination of the side of the leading edge of the original with respect to a width direction orthogonal to the conveyance direction; rotationally correct the image read by the reader by the inclination amount so as to reduce the inclination amount to output a first image in which the rotationally corrected image is included in a case where the inclination amount is smaller than a predetermined amount.

A method and system for automatically verifying the authenticity of documents is provided. The method has: scanning a document to be verified in the visible and ultraviolet light spectrum; detecting in the scanned document digital watermarks printed with visible and ultraviolet ink; decrypting the marks, thereby obtaining an ultraviolet mark identifier and a variable data mark identifier; validating the percentage of the mark by checking for the presence of the digital watermark in different areas of the scanned document; comparing the mark identifiers obtained with mark identifiers stored in a database; and determining the validity of the document on the basis of the comparison. The invention allows the validity of the data printed in the document to be checked automatically, reducing the possibility of the undetected falsification, modification or total or partial alteration of a document.

An image scanning device according to aspects of the present disclosures includes a transparent plate member on which an original document can be placed, a line sensor configured to receive a light emitted from a light source and reflected by the original document, and output an electrical signal according to the reflected light, a holding member configured to cover an upper surface of the plate member, and a controller. The controller is configured to obtain a first electrical signal corresponding to a first reflected light when the light source emits light having a first light amount, obtain a second electrical signal corresponding to a second reflected light when the light source emits light having a second light amount, and determine a particular scanning mode for scanning the original document placed on the plate member based on an image difference value calculated from the first and second electrical signals.

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.