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 system for capturing images during production of printed material includes an optical device comprising a plurality of cameras arranged in an array with adjacent pairs of cameras having overlapping fields of view. An imaging controller device determines a layout of content on printed material, and determines, based on the layout, an optical system configuration profile. Determining the optical system configuration profile includes selecting one or more cameras for capturing images of regions of interest on the printed material and determining a trigger interval for triggering the selected one or more cameras. The imaging controller device triggers the selected cameras at times determined based on the trigger interval to capture images of the regions of interest on the printed material as the printed material moves in fields of view of the one or more cameras during production of the printed material.

An image reading device that efficiently performs shading correction that flexibly responds to changes in the diffusion properties of reflected light on the surface of a reading target efficiently performing same as a result of including: controlling a plurality of light sources so as to cause only a specific light source among the light sources to be lit; obtaining the diffusion state of a first reflected light generated by the specific light source being lit, in a state in which general shading correction data not dependent on the image reading target is generated; obtaining a diffusion state for a second reflected light generated by light being irradiated on to the reading target by the specific light source; and generating dedicated shading correction data that relies on the reading target, based on the first reflected light diffusion state, the second reflected light diffusion state, and the general shading correction data.

A reading device and an image forming apparatus are provided. The reading device includes an image reading device configured to read an image on a recording medium being conveyed, a background device serving as a background image when the image is read by the image reading device, and a foreign-object detector configured to compare a first read image obtained as the background device is read by the image reading device with a second read image obtained as the background device and the recording medium are read by the image reading device to detect an attached foreign object. The image forming apparatus includes the reading device and an image forming device.

A fraud confirmation assisting apparatus includes a light source, a reading sensor, and processing circuitry. The light source irradiates an object to be read with light in at least an invisible wavelength range. The reading sensor has sensitivity at least in the invisible wavelength range. The processing circuitry performs a reading operation on the object to be read by a combination of the light source and the reading sensor, and outputs a plurality of pieces of fraud confirmation information based on read information output from the reading sensor by the reading operation.

An image reading device includes a placement section on which a subject is placed, an image capturing unit that is disposed above the placement section and captures an image of the subject, an irradiating unit that is disposed above the placement section and irradiates the subject with light, and a display unit that is disposed between the placement section and the image capturing unit and between the placement section and the irradiating unit, the display unit being located at a position outside an image capturing range of the image capturing unit and an irradiation range of the irradiating unit.

In a scanner, a pulse generator generates a pulse signal, a transmissive optical sensor includes a light projector that projects pulsed light corresponding to the pulse signal and a light receiver disposed so as to face the light projector, a peak hold circuit holds a peak value of a voltage value indicating a light reception amount of the pulsed light in the light receiver, and a first current supply circuit increases a light projection amount of the pulsed light projected from the light projector by increasing a current supplied to the light projector when the peak value is smaller than a reference value and decreases the light projection amount of the pulsed light projected from the light projector by decreasing the current supplied to the light projector when the peak value is larger than the reference value.

A multi-mode scanning device for scanning an original includes a non-transparent element, a first light source, a second light source and an optical module. The first light source outputs visible light to irradiate the non-transparent element and the original to generate first light and second light, respectively. The second light source outputs invisible light to irradiate a combination of the non-transparent element and the original to generate third light and fourth light. The optical module receives the first light, the second light, the third light and the fourth light and generates sensing signals representative of visible light information and invisible light information of the original. The original is disposed between the non-transparent element and the optical module. The first light source and the optical module are disposed on a same side of the non-transparent element.

An image scanning apparatus includes plural light sources, an image sensor, a driving circuit, and a controller. The plural light sources are configured to emit light of plural colors. The image sensor is configured to scan an image on the basis of the light sequentially emitted by the plural light sources. The driving circuit is configured to drive the plural light sources. The controller is configured to supply to the driving circuit an instruction of light-emitting pulse widths of the light sources. Further, the controller corrects the light-emitting pulse widths in monochrome scanning on the basis of a rising time and a falling time of driving currents conducted through the light sources by the driving circuit so as to cause the light-emitting pulse widths to agree with light-emitting pulse widths based on predetermined color balance ratios of the plural colors, respectively.

An image generating device includes a support unit configured to support an object, an irradiation unit configured to irradiate the object disposed on the support unit with light, a light receiving unit configured to receive light returning from the object disposed on the support unit, and a control unit configured to generate a light irradiation signal for controlling the irradiation unit and a light-receiving region driving signal for controlling the light receiving unit, wherein the irradiation unit includes a first irradiation unit for irradiating a first region of the object with light and a second irradiation unit for irradiating a second region of the object with light, the light receiving unit includes a first light-receiving region and a second light-receiving region, the first light-receiving region and the second light-receiving region each include a plurality of pixels and are disposed at different positions on the light receiving unit.