A reading device includes a light source to irradiate a subject with light, an imaging device to receive light reflected from the subject to generate an image, and circuitry to detect an edge of the subject to obtain a detection result, determine a size of the subject in accordance with the detection result, in a case that the detection result indicates that an upper edge or a lower edge of the subject in a main scanning direction of the imaging device is not detected at both ends, determine a width of the subject in the main scanning direction, and in a case that the detection result indicates that the upper edge or the lower edge of the subject in the main scanning direction is detected at both ends, determine the width of the subject in the main scanning direction to be a preset width.

Example implementations relate to print media rollers. For example, implementations can include a device that includes a first roller to receive print media, a first sensor to determine when a leading edge of the print media is at a first location, a second roller to be activated based on a type of the print media and when the leading edge of the print media interacts with the first sensor, a second sensor to determine when the leading edge of the print media is at a second location, wherein the first roller is deactivated based on when the leading edge of the print media interacts with the second sensor.

An image processing apparatus includes a processor configured to: acquire a read image of a document that is read by a document reading apparatus; and control an image output device such that the read image is outputted to a medium with a significance portion and an edge region prevented from overlapping, and a length of the medium in a sub scanning direction is increased in a case where the significance portion of the read image and the edge region in the sub scanning direction in which the read image is outputted to the medium overlap.

A document processing apparatus includes a document tray, a conveyor, a reading device, and circuitry. The conveyor conveys an original document from the document tray. The reading device reads an image on the original document conveyed by the conveyor as a reading operation. The circuitry is to acquire document processing information of the original document, estimate a conveyance-failure occurrence rate when the reading device reads the image on the original document while the conveyor conveys the original document, based on combination data of the document processing information and the conveyance-failure occurrence rate when the conveyor autonomously conveys the original document in an autonomous conveyance mode without an instruction from an image forming apparatus, and determine a conveyance control amount of the conveyor to convey the original document according to the conveyance-failure occurrence rate estimated.

An image reading apparatus includes a transport section that can transport original documents along a transport path, a reading section configured to read images of the original documents transported by the transport section, an output controller configured to output data of the original documents read by the reading section, a multi-sheet feed detection sensor configured to detect a multi-sheet feed of the original documents transported by the transport section, and an instruction section configured to issue an instruction to disable multi-sheet feed detection by the multi-sheet feed detection section.

According to examples, an apparatus may include a processor and a memory on which are stored computer-readable instructions that, when executed by the processor, may cause the processor to identify first property values along an image of a pattern. The first property values may be identified based on a first signal corresponding to an image of the pattern captured by an imaging sensor. The pattern may be positioned at a spaced relation with respect to the imaging sensor. The processor may receive a second signal corresponding to a second image captured by the imaging sensor, and may identify, from the second signal, second property values along the second image. Based on a determination that the second property values differ from the first property values, the processor may determine that a beginning of a media is positioned to be imaged by the imaging sensor.

An image processing device includes circuitry configured to calculate an edge amount for the target pixel in a shadow region in image data; determine whether the target pixel corresponds to an edge, based on the edge amount; determine whether the edge is a part of a continuous edge based on the edge amount, in response to a determination that the target pixel corresponds to the edge; count an edge continuity number for the target pixel; count an edge continuity number for a previous target pixel selected immediately before the target pixel and determine whether the edge continuity number for the previous target pixel is greater than a preset number in response to a determination that the target pixel does not correspond to the edge; and detect a boundary position based on the edge amount of each of the target pixels forming the continuous edge up to the previous target pixel.

An image reading device includes a tubular-shaped housing, a cylindrical document setting section that is arranged in the housing and on which a document wound in a cylindrical shape is set, an document leading edge inlet into which a leading edge of the document in a rotation direction enters when the document set in the document setting section receives rotational forces RL and RR and rotates, a transport path that is arranged in the housing and along which the document that has entered the document leading edge inlet is transported in a transport direction F by receiving a transport force Cf, a reading section configured to read the image of the document transported along the transport path, and a discharge section to which the document read by the reading section is discharged.