An image forming apparatus includes a display device, a first detection unit, a second detection unit, a first acquisition unit, and an output unit. The display device displays at least one image for display. The first detection unit detects a user's selection of an image for display in at least one image for display. The second detection unit detects an input to a drawing region of drawing indicating an image quality abnormality with respect to a target image corresponding to the selected image for display. The first acquisition unit acquires drawing information based on the input of the drawing detected by the second detection unit. The output unit outputs the drawing information acquired by the first acquisition unit.

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.

An image reading apparatus includes a conveyance unit configured to convey an original; a reading unit comprising a reading sensor, the reading sensor having a light receiving element to receive light of a first color and a light receiving element to receive light of a second color that is different from the first color, wherein the reading unit is configured to read an image of the original conveyed by the conveyance unit by using the reading sensor to generate image data which represents a reading result of the reading unit; at least one processor configured to: determine a first abnormal position that is a position in a first direction of an abnormal pixel of the first color in an image represented by the image data.

A dual-axle linkage detection structure includes a first object, a second object, a sensor body, and a shielding element. The first object is movably connected to a base. The second object is movably connected to the first object. The sensor body is disposed on the first object and includes detecting positions. The shielding element includes a shielding part. When the second object covers the first object and the first object covers the base, the shielding part moves into the detecting position. When the second object moves away from the first object, or when the first object moves away from the base and drives the shielding element to rotate, the shielding part moves out of the detecting position.

According to one embodiment, an image forming apparatus includes a detachable device, an antenna, and a control unit. The detachable device is attachable to and detachable from the own apparatus and includes a wireless tag. The antenna receives a wireless signal from the wireless tag if the detachable device is mounted. The control unit determines that the detachable device is mounted to the own apparatus based on the wireless signal received by the antenna.

If an image read by an image reading unit is formed by an image forming unit, a control unit synthesizes a first encoded image and a second encoded image with the image formed by the image forming unit to generate a synthetic image, the first encoded image representing encoded data where reading setting information used for the image reading unit to read the image is encoded, the second encoded image representing encoded data where forming setting information used for the image forming unit to form the image is encoded, the first encoded image being synthesized at a position where a direction in which the document is read by the image reading unit is specifiable, and the second encoded image being synthesized at a position where a direction in which the image is formed on the sheet is specifiable. The image forming unit forms the synthetic image on the sheet.

A sensor apparatus includes a photosensitive sensor, a cover, and a moving mechanism. The photosensitive sensor includes a first lens and a second lens which focus on a photosensitive element. The cover includes a first slit arranged on an optical axis of the first lens and a second slit arranged on an optical axis of the second lens. The moving mechanism is configured to move the photosensitive sensor and the cover relative to each other so that the second slit is arranged on the optical axis of the first lens.

An image reading device includes: light receiving sensors configured to read an image of a document conveyed in a sub-scanning direction and be arranged with an interval in a main scanning direction; one pair of document conveying rollers configured to be provided in front and back of the light receiving sensors in a document conveying direction; a detection unit configured to detect an image overlap amount in an image overlap area and/or an image missing amount in an image missing area; an adjustment amount determination unit configured to determine an adjustment amount for adjusting a distance between the document and the light receiving sensors based on the image overlap amount and/or image missing amount detected; and a drive unit configured to adjust a distance between the document and the light receiving sensors by displacing one of the document conveying rollers and light receiving sensors according to the adjustment amount.

Provided is an electronic device in which, after user authentication is executed on the basis of identification information of a user acquired through a reader configured to read information from a contactless medium, a control unit causes a display unit to display a home screen when no job corresponding the identification information is registered, the control unit executes a process according to one piece of a job when only the one job is registered, and the control unit executes a process according to a job selected through an operation of the user from among two or more jobs when the two or more jobs are registered.

A method for printing defect detection includes processing and analyzing a difference image obtained by comparing an image scanned with a verifier to a reference image. The detected defects are grouped, and the grouping is refined. Confidence level values are then assigned to the refined groups, and analysis is performed to determine if one or more servicing actions should be taken.