The present disclosure pertains to an image reading device that may include an image reader, an operation detector, a correction parameter adjuster, an entry detector, and a document reading controller. The image reader may read an image on a document. The operation detector may detect an operation indicating a start of a reading of the image on the document. The correction parameter adjuster may perform adjustment of a correction parameter. The entry detector may detect entry of a document reading instruction including a reading condition. The document reading controller may check for completion of the adjustment of the correction parameter for the reading condition. If the adjustment of the correction parameter is not completed, the document reading controller may instruct the correction parameter adjuster to perform adjustment of an uncompleted correction parameter and instruct the image reader to read the image.

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 image recording device includes a recorder, a reader and a hardware processor. The recorder records an image on a recording medium. The reader reads, with an imaging element, a surface of the recording medium and a surface of a predetermined reference member. The hardware processor calibrates the reader for a value to be detected by the imaging element, based on a reading result of the reading of the surface of the reference member. Further, the hardware processor performs the calibration in at least one of: a case where a type of the image to be recorded on the recording medium satisfies a predetermined image type condition; and a case where a predetermined reading influence factor which affects a reading result of the reading of the surface of the recording medium satisfies a predetermined reading influence factor condition.

An image recording device includes a recorder, a reader and a hardware processor. The recorder records an image on a recording medium. The reader reads, with an imaging element, a surface of the recording medium and a surface of a predetermined reference member. The hardware processor calibrates the reader for a value to be detected by the imaging element, based on a reading result of the reading of the surface of the reference member. Further, the hardware processor performs the calibration in at least one of: a case where a type of the image to be recorded on the recording medium satisfies a predetermined image type condition; and a case where a predetermined reading influence factor which affects a reading result of the reading of the surface of the recording medium satisfies a predetermined reading influence factor condition.

A reading module has a light source, an optical system having a mirror array and an aperture stop portion, a sensor in which a plurality of image regions where the image light is converted into an electrical signal are arranged; a housing; and a light-shielding wall shielding stray light striking the image regions. In the mirror array, a plurality of reflective mirrors whose reflection surfaces are aspherical concave surfaces are coupled together in an array in the main scanning direction. The optical system is fixed to on the case housing at one point in the main scanning direction, and the light shielding walls are arranged at a positions displaced deviated by a predetermined amount from boundaries between the image regions in the direction opposite to the fixed side of the optical system.

A reading module has a light source, an optical system having a mirror array and an aperture stop portion, a sensor in which a plurality of image regions where the image light is converted into an electrical signal are arranged; a housing; and a light-shielding wall shielding stray light striking the image regions. In the mirror array, a plurality of reflective mirrors whose reflection surfaces are aspherical concave surfaces are coupled together in an array in the main scanning direction. The optical system is fixed to on the case housing at one point in the main scanning direction, and the light shielding walls are arranged at a positions displaced deviated by a predetermined amount from boundaries between the image regions in the direction opposite to the fixed side of the optical system.

A relative position identification portion is included that identifies a relative position of a personal digital assistant with respect to an image forming apparatus. The relative position identification portion acquires the relative position of the image forming apparatus and the personal digital assistant, displays, on the display portion of the personal digital assistant, an image that shows the position and the direction of the image forming apparatus seen from a user who carries the personal digital assistant and an image of the position and the direction of an original document which is arranged in the reading portion of the image forming apparatus and which is seen from the user and thereafter transmits, to the image forming apparatus, setting information based on an input operation of the operator.

A relative position identification portion is included that identifies a relative position of a personal digital assistant with respect to an image forming apparatus. The relative position identification portion acquires the relative position of the image forming apparatus and the personal digital assistant, displays, on the display portion of the personal digital assistant, an image that shows the position and the direction of the image forming apparatus seen from a user who carries the personal digital assistant and an image of the position and the direction of an original document which is arranged in the reading portion of the image forming apparatus and which is seen from the user and thereafter transmits, to the image forming apparatus, setting information based on an input operation of the operator.

A radiation imaging apparatus includes a pixel array including n pixel rows, where n3, and a driving circuit configured to scan the pixel array from a first row toward an n.sup.th row, counting from one end of the pixel array. In a case where a region of interest is included in a partial region composed of pixel rows from an i.sup.th row to a j.sup.th row, where 1<ij<n, the driving circuit starts scanning of the pixel array from the first row, and starts scanning of the pixel array from the first row again during scanning of pixel rows from a (j+1).sup.th row to the n.sup.th row.

An image reading apparatus includes a first sensor, a second sensor, a third sensor, a first processor that generates a first merge image based on first image data acquired by reading by the first sensor and second image data acquired by reading by the second sensor, and a second processor that generates a second merge image based on the second image data and third image data acquired by reading by the third sensor, and generates an output image by performing a linking process on the first merge image and the second merge image.