An image forming device and an image forming system which can perform a sheet setting process for a sheet on which an image or text has already been formed, an image forming system control method, and a non-transitory computer-readable recording medium storing a program. The image forming device includes a communication section, a determination section, and a notifying section. The communication section receives, from a sheet detector for detecting a physical property value of a sheet, detected information acquired by detecting the sheet. The determination section determines whether the detected information meets a given condition or not. If the determination section determines that the given condition is not met, the notifying section notifies a user that the given condition is not met.

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 includes: a light source; a reference sheet that reflects light emitted from the light source; a light-receiving lens that converges the reflected light; a reading sensor that reads the light converged by the light-receiving lens; and a hardware processor that: based on first white data obtained when the reading sensor reads the reference sheet for the first time, determines whether the reference sheet or the reading sensor has dust; in response to determining that the reference sheet or the reading sensor has dust, produces ideal initial white reference data by complementing the first white data with second white data obtained when the reading sensor reads the reference sheet for the second and subsequent times; and with the ideal initial white reference data, complements third white data obtained when the reading sensor reads the reference sheet right before reading an image of a job.

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.

The image reading apparatus includes a reading unit, a reading region in which a first region in which a member that suppresses entry of external light is disposed and a second region other than the first region are arranged in a main scanning direction of the reading unit, and a controller, wherein the controller calculates intensity of external light in the second region based on a reading value in the reading region, wherein the reading value is obtained by the reading unit, determines whether the intensity of the external light exceeds a threshold value, performs a first shading correction on a reading value of a document transported to the reading region when the intensity of the external light exceeds the threshold value, and performs a second shading correction on the reading value of the document when the intensity of the external light does not exceed the threshold value.

An image reading apparatus according to the present disclosure includes a platen glass, an image reader, and an output interface. An original is placed on the platen glass. The image reader is configured to read an image of the original on the platen glass. The image reader includes at least one sensor configured to detect a quantity of light for each of a plurality of regions on the platen glass. The output interface is configured to output information which identifies one or more regions of the plurality of regions in which the quantity of light detected therefrom exceeds a given value.

There is provided a scanner that combines images read by a first sensor array and a second sensor array, in which the first sensor array and the second sensor array have read regions which are overlapped partially, and includes a combining section that deforms and combines an image in a region read in an overlapped manner in a main scanning direction in at least any one of a first read image read by the first sensor array and a second read image read by the second sensor array.

An image processing device includes: a sensor that reads a print region and a non-print region of a print medium, an image being printed in the print region, the non-print region being a blank area; and a controller that makes shading correction for an output from the sensor, based on a read result from the sensor. The controller sets a patch image printed in the print region to a black reference, sets the non-print region to a white reference, and makes the shading correction, based on properties of the black reference and the white reference at individual locations.

An image scanner includes: a document table; a document cover; a light source; an image sensor; and a circuit configured to: acquire, as pre-reading black data, the line data that is generated by the image sensor in a state where the light source is turned off; after acquiring the pre-reading black data, acquire, as line image data, the line data that is generated by the image sensor in a state where light is emitted from the light source to an original document supported on the document table; after acquiring the line image data, acquire, as post-reading black data, the line data that is generated by the image sensor in a state where the light source is turned off; determine black reference data based on the post-reading black data and the pre-reading black data; and perform black correction on the line image data based on the black reference data.

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.