Abstract: An image forming apparatus includes a plurality of light emitting portions configured to expose to light a photosensitive drum, a detection unit configured to detect an opening of a maintenance door, a output unit configured to output image data for controlling turning on and off of the plurality of light emitting portions, a drive unit configured to drive the plurality of the light emitting portions based on the image data, wherein the photosensitive drum stops rotating when the detection unit detects that the maintenance door is open, wherein the output unit output the image data indicating turning off of the plurality of light emitting portions when the detection unit detects that the maintenance door is open, and a power supplied to the drive unit is maintained in a case where the maintenance door is opened.

Abstract: A management system includes a plurality of image forming apparatuses and a management apparatus connectable to a device of each image forming apparatus via a network. The management system includes a detection unit that detects a condition of the image forming apparatus, a storage unit that stores condition information acquired by the detection unit detecting the condition, a transmission unit that transmits the condition information stored in the storage unit to the management apparatus, and a display unit that displays information. The display unit displays, on a same screen, data calculated from pieces of condition information of the plurality of image forming apparatuses transmitted to the management apparatus, and the condition information stored in the storage unit.

Abstract: There is provided an information processing apparatus. The information processing apparatus acquires image data of a document read via a scanner; detects a streak included in the image data acquired by the acquisition unit by using a parameter for detection processing of detecting a streak; transmits the image data, the parameter, and a detection result obtained by the detection unit to an external apparatus; and changes the parameter used by the detection unit upon reception of a change in the parameter from the external apparatus.

Abstract: An image processing apparatus includes a printer that prints an image on a sheet, a scanner that reads an image on a sheet, and one or more controllers configured to cause the scanner to read an image on a sheet, to cause a display to display the image, to receive an instruction for adopting an image serving as a candidate for a correct image from the displayed image, to generate the correct image based on the image serving as the candidate, to register the correct image, and to cause the scanner to read an image printed on a sheet and to verify the printed image based on the read image and the registered correct image. When a defective image is in the read image, the display displays the defective image in which a defective area is emphasized and the defective image in which the defective area is not emphasized.

Abstract: There is provided an information processing apparatus. The information processing apparatus acquires image data of a document read via a scanner; detects a streak included in the image data acquired by the acquisition unit by using a parameter for detection processing of detecting a streak; transmits the image data, the parameter, and a detection result obtained by the detection unit to an external apparatus; and changes the parameter used by the detection unit upon reception of a change in the parameter from the external apparatus.

Abstract: An image forming apparatus including: a light source configured to emit a light beam based on an image signal; a deflector configured to deflect the light beam so that the light beam emitted from the light source is scanned on a surface of a photosensitive member in a main scanning direction; a storage portion configured to store a first magnification of an image with respect to a scanning position in the main scanning direction; and a controller configured to generate a second magnification of the image with respect to a reference color image, wherein the controller generates a third magnification based on the first magnification corrected based on the second magnification and the second magnification to correct the image signal based on the third magnification.

Abstract: An image processing apparatus obtains read image data by causing a reader to read a sheet onto which an image serving as a candidate for correct image data is printed, displays, on a display, a preview of the read image data along with a screen for enabling image data that is to serve as a candidate for the correct image data to be selected from the read image data, and generates the correct image data on the basis of the image data selected in the screen.

Abstract: Provided is an image reading apparatus, which is configured to correct a streak image in such a manner as to prevent a correction trace from becoming noticeable even when a streak changes in thickness. The image reading apparatus performs streak image correction for detecting a streak pixel that forms the streak image from image data obtained by reading an original being conveyed. A control unit of the image reading apparatus stores a value of a hysteresis width with a value of a detected streak width being set as an initial value. Each time the streak width is detected, the control unit increments a value of a hysteresis counter when the value of the detected streak width is equal to the value of the hysteresis width, and decrements the value of the hysteresis counter when the value of the detected streak width is different from that of the hysteresis width.

Abstract: In an information processing apparatus connected with an image forming apparatus having an image forming unit, the image forming unit includes a first receiver, a light source, a photosensitive member, a rotatable polygon mirror including a plurality of reflection surfaces, a light receiver configured to receive light, an identifier configured to identify a reflection surface to be used for scanning the photosensitive member, and a first outputter. The information processing apparatus includes a second receiver configured to receive the predetermined signal, a corrector configured to correct the image data with correction data corresponding to the reflection surface corresponding to each scan line based on the specific reflection surface, and a second outputter configured to start outputting the image data in response to start of reception of the predetermined signal.

Abstract: Provided is an image reading apparatus, which is configured to correct a streak image in such a manner as to prevent a correction trace from becoming noticeable even when a streak changes in thickness. The image reading apparatus performs streak image correction for detecting a streak pixel that forms the streak image from image data obtained by reading an original being conveyed. A control unit of the image reading apparatus stores a value of a hysteresis width with a value of a detected streak width being set as an initial value. Each time the streak width is detected, the control unit increments a value of a hysteresis counter when the value of the detected streak width is equal to the value of the hysteresis width, and decrements the value of the hysteresis counter when the value of the detected streak width is different from that of the hysteresis width.

Abstract: An image forming apparatus including: a light source configured to emit a light beam based on an image signal; a deflector configured to deflect the light beam so that the light beam emitted from the light source is scanned on a surface of a photosensitive member in a main scanning direction; a storage portion configured to store a first magnification of an image with respect to a scanning position in the main scanning direction; and a controller configured to generate a second magnification of the image with respect to a reference color image, wherein the controller generates a third magnification based on the first magnification corrected based on the second magnification and the second magnification to correct the image signal based on the third magnification.

Abstract: An image reading apparatus which is capable of, even when there are foreign objects on a reading glass, determining a position unlikely to be adversely affected by the foreign objects as a reading position and reading an image. An original is conveyed to a reading area on the reading glass, and a reading unit reads the original at a reading position within the reading area. Foreign objects adhered to a plurality of candidate reading positions are detected using image data read at the plurality of candidate reading positions within the reading area by the reading unit in a state where the original is not being conveyed. A density of the foreign objects is measured, and a reading position at which the original is read is selected from among the candidate reading positions according to the density of the foreign objects.

Abstract: An image reading apparatus that can, even when foreign matter exists on an original platen glass, determine a position less affected by the foreign matter, as an image reading position. In the image reading apparatus, an original is conveyed to a reading area on the original platen glass, and a reading unit reads the original at a reading position within the reading area. Image data is read at a plurality of candidate reading positions within the reading area in a state where the original is not conveyed, and foreign matter adhering to the candidate reading positions is detected. The number of pieces and the size of each piece of the detected foreign matter are measured, and a reading position for reading the original is determined from the plurality of candidate reading positions using a result of the measurement.

Abstract: An image reading apparatus that can, even when foreign matter exists on an original platen glass, determine a position less affected by the foreign matter, as an image reading position. In the image reading apparatus, an original is conveyed to a reading area on the original platen glass, and a reading unit reads the original at a reading position within the reading area. Image data is read at a plurality of candidate reading positions within the reading area in a state where the original is not conveyed, and foreign matter adhering to the candidate reading positions is detected. The number of pieces and the size of each piece of the detected foreign matter are measured, and a reading position for reading the original is determined from the plurality of candidate reading positions using a result of the measurement.

Abstract: An image reading apparatus which is capable of, even when there are foreign objects on a reading glass, determining a position unlikely to be adversely affected by the foreign objects as a reading position and reading an image. An original is conveyed to a reading area on the reading glass, and a reading unit reads the original at a reading position within the reading area. Foreign objects adhered to a plurality of candidate reading positions are detected using image data read at the plurality of candidate reading positions within the reading area by the reading unit in a state where the original is not being conveyed. A density of the foreign objects is measured, and a reading position at which the original is read is selected from among the candidate reading positions according to the density of the foreign objects.

Abstract: In an image forming apparatus, in a state where the control unit controls the rotation speed of the photosensitive member to Vp1, a control unit causes N light-emitting elements out of the plurality of light-emitting elements to emit the light beams and controls the rotation speed of the rotating polygonal mirror to Vr1, and in a state where the control unit controls the rotation speed of the photosensitive member to Vp2 lower than Vp1, the control unit causes M (M<N) light-emitting elements out of the plurality of light-emitting elements to emit the light beams and controls the rotation speed of the rotating polygonal mirror to Vr2 different from Vr1.