A controller of an image reading device performs search for an edge candidate position inward from an edge portion in a main scanning direction of analysis image data in an extraction process of extracting a document region from read image data. When the retrieved edge candidate position corresponds to a dirt position, the search is continued whereas when the retrieved edge candidate position does not correspond to the dirt position, the document region is extracted from the read image data at the retrieved edge candidate position.

A first surface of a first sheet has a second image formed in advance. An image forming system generates reference data based on a result of reading an image on the first surface of the first sheet on which a first image is not formed, generates first image data that represents a result of reading an image on the first surface of the first sheet having the first image formed on the first surface, and determines, based on the reference data and the first image data, a relative position between the first image and the second image on the first surface of the first sheet.

An image reading apparatus includes a conveyance unit and a reading unit. Based on read image data from the reading unit, a tilt amount of an edge of a document on a leading edge side in a conveyance direction in which the document is conveyed is decided. If the decided tilt amount exceeds a first threshold where a setting that performs document digitalization with respect to the image data, notification is given of information indicating that reading of the document for the document digitalization has failed. If the decided tilt amount is smaller than the first threshold, skew correction is executed for correcting the tilt amount based on the decided tilt amount with respect to the image data, and the document digitalization is executed with respect to the image data for which the skew correction has been executed.

An image reading apparatus includes an image reading portion, a rotation processing portion, a recognition processing portion and an inclination detecting portion. The image reading portion reads an image of a sheet conveyed through a conveyance path. The rotation processing portion applies rotation processing to the image of the sheet read by the image reading portion to generate a plurality of comparative images each having a different angle with respect to the conveyance direction of the sheet. The recognition processing portion applies recognition processing to a symbol of each of the plurality of comparative images to determine a corresponding matching degree. The inclination detecting portion detects the inclination of the image of the sheet based on the matching degrees.

A verification apparatus according to one embodiment of the present disclosure selects an image associated with a code of a reference image switching sheet as a reference image when the code of the reference image switching sheet is read. An instruction is provided to discharge the reference image switching sheet to a set sheet discharging destination.

An image inspection device includes a hardware processor executing an inspection for a first read image generated by reading a first sheet on which one image is formed, based on a reference image. When an operation for newly generating the reference image is performed in association with the inspection for the first read image, the hardware processor acquires second read images generated by respectively reading second sheets on each of which the one image is formed and generates the reference image using the inspection for the first read image. When an operation for using the generated reference image stored in a storage unit is performed in association with the inspection for the first read image, the hardware processor uses the reference image in the storage unit for the inspection for the first read image, without newly acquiring the second read images.

Printers capable of determining a media type of a media and associated methods are provided. An example method includes scanning a media with a verifier associated with the printer to generate at least two consecutive windows of the media. The example method further includes determining a vertical length of a captured image based on a comparison of image characteristic values captured in the at least two consecutive windows. The example method further includes determining a media characteristic associated with the media based at least on the captured image and the vertical length and one or more stored media profiles. The example method further includes calibrating the printer based on the media characteristic.

An image inspection device includes a hardware processor executing an inspection for a first read image generated by reading a first sheet on which one image is formed, based on a reference image. When an operation for newly generating the reference image is performed in association with the inspection for the first read image, the hardware processor acquires second read images generated by respectively reading second sheets on each of which the one image is formed and generates the reference image using the inspection for the first read image. When an operation for using the generated reference image stored in a storage unit is performed in association with the inspection for the first read image, the hardware processor uses the reference image in the storage unit for the inspection for the first read image, without newly acquiring the second read images.

A conveyance apparatus includes a separation unit configured to separate and convey a sheet, a detection unit configured to detect a floating of the sheet passing through the separation unit, and a control unit configured to stop separate conveyance by the separation unit if the detection unit detects the sheet for not less than a predetermined time and/or a predetermined count.

A control apparatus includes a storing unit, a determining unit, a first notification unit, a selection unit, and a second notification unit. The storing unit stores attribute information of sheets to be stored in sheet holding units. The determining unit determines whether attribute information of sheets to be used by a job corresponds to the stored sheet attribute information. The first notification unit notifies, in a case where the determining unit determines that the attribute information does not correspond, a user that the attribute information does not correspond to the sheet attribute information. The selection unit selects the stored sheet attribute information to change the attribute information of sheets to be used by the job. The second notification unit notifies, in accordance with selection of the sheet attribute information, the user that the attribute information of sheets to be used by the job corresponds to the stored sheet attribute information.