Provided is a recording apparatus capable of accurate positioning and size detection in accordance with a medium size in a paper feed cassette capable of supporting media of a plurality of sizes.

A document reading apparatus includes a calculation unit configured to calculate first shading data of a first sensor based on first measurement data acquired by the first sensor by reading a first reference member and calculate second shading data based on second measurement data acquired by a second reading sensor by reading a second reference member and profile data, and a verification unit configured to verify the profile data, and if the profile data is judged incorrect as a result of the verification, the calculation unit calculates the second shading data from the second measurement data acquired by the second reading sensor by reading the second reference member without using the profile data, and if the profile data is judged correct as a result of the verification, the calculation unit calculates the second shading data based on the second reference data and the profile data.

An image reading apparatus includes the following. A conveyor conveys a sheet on which an image is formed by an image forming apparatus. An image reader reads the image formed on the sheet. A storage stores a speed variation profile which shows a speed variation for conveying the sheet with the conveyor when the image is read by the image reader. A controller, based on a speed variation profile stored in the storage, controls the conveyor to cancel a variation in speed shown by the speed variation profile, controls the image reader to read a reference mark formed on a sheet by the image forming apparatus, and obtains a forming position of the reference mark.

Provided is a recording apparatus capable of accurate positioning and size detection in accordance with a medium size in a paper feed cassette capable of supporting media of a plurality of sizes.

According to one embodiment, there is provided an image processing apparatus including a reading unit and a determining unit. The reading unit generates sheet image data indicating image data of a sheet. The determining unit determines, on the basis of a degree of gradation in the sheet image data generated by the reading unit, whether a planar object adheres on the sheet read by the reading unit.

An image processing device comprises a receiving port, a processor and an output port. The receiving port receives old image data from a peripheral device. The old image data has partial positioning mark data corresponding to a portion of a positioning mark of a document, and partial main image data corresponding to a partial main image of a portion of a main image of the document. The processor electrically connected to the receiving port shifts the partial main image by a calibration distance in a calibration direction to a standard position of a typesetting page according to the partial positioning mark data and the partial main image data, and adds a predetermined image to one side or neighboring two sides of the partial main image to generate new image data. The output port electrically connected to the processor outputs the new image data. Copy apparatus and method are also provided.

An image reading device having a mark formed on front and back of a sheet by an image forming device, and including a first scanner which reads the mark and a second scanner provided at a downstream side of the first scanner and which reads the mark, includes: a position adjusting unit configured to adjust front and back positions of the mark on the basis of a print position of the mark read by at least one of the first scanner and the second scanner; and a monitoring unit configured to monitor front and back misregistration of the mark on the basis of the front and back positions of the mark adjusted by the position adjusting unit.

An image reading apparatus for reading an image on a sheet while conveying the sheet includes a conveyance mechanism configured to convey the sheet, a guide unit configured to be attachable and detachable with respect to a predetermined position of the image reading apparatus and to guide the sheet, and a detector configured to detect whether the guide unit is attached to the predetermined position.

An image reading apparatus includes a sensor, a light source, and an image-capture controller. The sensor has a sensitivity area that is in a predetermined wavelength band, and acquires an image signal in accordance with light from sheet. The light source has a first light emitting unit that emits first light having a wavelength within the sensitivity area of the sensor, and a second light emitting unit that emits second light that has a wavelength which is outside of the sensitivity area of the sensor and that excites a fluorophore applied on the sheet. The image-capture controller irradiates the sheet with the first light and the second light to acquire a first image signal using the sensor, and irradiates, after acquiring the first image signal, the sheet with only the second light to acquire a second image signal using the sensor.

A printer includes: a processor; a head configured to perform printing; a sensor configured to detect an amount of movement of the printer; and a scanner configured to acquire an image including a frame described on a material to be printed beforehand, the scanner being disposed forward of the head in a moving direction of the printer. The processor executes during scanning for frame detection over the material to be printed, frame detection processing to detect the frame based on the amount of movement and the image without performing the printing, and during scanning for printing over the material to be printed, print processing to perform the printing with the head based on the frame detected.