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 reading apparatus according to an embodiment includes an image reading unit configured to generate reference data by reading a reference surface and to generate image data by reading a sheet. A reference unit has a reference surface. A shading correction unit determines whether a portion of the reference surface includes a contaminant based on image data generated by the image reading unit reading the portion of the reference unit. When the portion of the reference surface is determined to not include a contaminant, the shading correction unit generates reference data based on the image data generated by the image reading unit reading the portion of the reference surface determined to not include a contaminant.

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.

A discharge unit discharges a sheet having an image thereon. A switching unit switches between stacking the sheet discharged from the discharge unit on a stacking unit or conveying the sheet from the discharge unit toward an image reading apparatus. A conveyance unit conveys the sheet conveyed via the switching unit to a reading unit. A cooling unit cools the sheet discharged from the discharge unit or cools the reading unit.

An image forming apparatus includes an image forming device and circuitry. The image forming device is configured to form an image on a medium. The circuitry is configured to detect a position of the image forming device relative to the medium. The circuitry is further configured to control the image forming device based on the position of the image fanning device detected and image data. The circuitry is further configured to control a system state of the image forming device based on the position of the image forming device associated with movement of the image forming device relative to the medium.

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.

A reading apparatus includes: a reading section configured to generate a first image being a read image of a first face of a document sheet and a second image being a read image of a second face of the document sheet; if there is a brightness change area including a bright part having a brightness change in a convex state and a dark part being in contact with the bright part and having a brightness change in a concave state at an identical position on both of the images, an identification section configured to identify the brightness change area as a wrinkle area; and an output section configured to output the first image having been subjected to image processing of the identified wrinkle area.

An image reading apparatus according to an embodiment includes an image reading unit configured to generate reference data by reading a reference surface and to generate image data by reading a sheet. A reference unit has a reference surface. A shading correction unit determines whether a portion of the reference surface includes a contaminant based on image data generated by the image reading unit reading the portion of the reference unit. When the portion of the reference surface is determined to not include a contaminant, the shading correction unit generates reference data based on the image data generated by the image reading unit reading the portion of the reference surface determined to not include a contaminant.

An image reading apparatus including a controller configured to perform an update processing for updating shading correction data stored in a memory by a generation processing of generating shading correction data based on an image signal of a reference member and perform a size determination processing for determining a size of a document based on an image signal of the document, wherein, when the document on the document platen is read, the controller performs the generation processing before the document is read, and an image processing portion performs the shading correction using the shading correction data generated before the document is read, and wherein, when the size determination processing is performed, the image processing portion performs the shading correction using the shading correction data stored in the memory, and the update processing is not performed.

Provided is an image forming apparatus capable of accurately returning a carriage to a home position without having to turn ON a light source in the process of returning the carriage to the home position. A first reading-position-detection plate is arranged inside of a reading width of a line sensor and outside of a document-image-reading width. A second color region has a length that gradually increases in the main scanning direction as going away from the home position of the carriage. A reading-position-detecting unit detects the length in the main scanning direction of the second color region on the basis of output from the line sensor. A movement-distance-converting unit converts this length to a movement distance to the home position. A movement-control unit causes the carriage to move toward the home position just the movement distance.