An image forming system generates second image data representing a result of a reading unit reading an image on a sheet, corrects the second image data using correction data, the correction data being data obtained on the basis of image data obtained by the reading unit reading a predetermined image formed on the sheet by an image forming unit and image data corresponding to the predetermined image, and inspects, on the basis of the corrected second image data and a first image data, an image formed on the sheet on the basis of the first image data.

A control unit of an image forming apparatus can perform a density correction mode to correct toner density, based on detection results of toner density of a plurality of reference images formed with density gradations changed sequentially in a plurality of steps, detects presence or absence of a change in the voltage in each density gradation, based on the toner density detection value detected in the density correction mode, and if the density gradation has a specific density gradation in which a change in the voltage is detected, it corrects the toner density of the specific density gradation, using the detection values of density gradations before and after the specific density gradation.

An image forming method performed in an image forming apparatus to form an image on a sheet includes receiving image data, and in a case where a first image is formed in a first area on a first surface of the sheet, a first test image for adjusting an image forming condition is formed in a second area on the first surface of the sheet and a second image is formed on a third area, corresponding to the second area, on a second surface opposite to the first surface of the sheet, deleting, in the image data, image data that corresponds to the third area of the second surface. In addition, an image is formed based on the image data in which the image data that corresponds to the third area was deleted.

An image forming apparatus includes: an electrophotographic photoreceptor; a charging device that charges a surface of the electrophotographic photoreceptor; an electrostatic charge image-forming device that forms an electrostatic charge image on the charged surface of the electrophotographic photoreceptor; a developing device that stores a developer containing a toner, and supplies the developer to develop the electrostatic charge image on the surface of the electrophotographic photoreceptor into a toner image, wherein the developing device has: a first developing member that is disposed to face the electrophotographic photoreceptor, holds the developer, and transports the developer to a development region; a second developing member that is disposed downstream of the first developing member in a rotation direction of the electrophotographic photoreceptor so as to face the electrophotographic photoreceptor, holds the developer, and transports the developer to a development region; a first power source that applies, to the first developing member, a developing voltage obtained by superimposing an AC voltage on a DC voltage; and a second power source that applies, to the second developing member, a developing voltage obtained by superimposing an AC voltage on a DC voltage; a transfer device that transfers the toner image on the surface of the electrophotographic photoreceptor to a surface of a recording medium; a fixing device that fixes the toner image to the surface of the recording medium; and a control device that acquires image information regarding the toner image, and controls at least one of the first power source and the second power source according to the image information such that the AC voltage of the developing voltage applied to the second developing member has a lower frequency than the AC voltage of the developing voltage applied to the first developing member.

An image forming apparatus includes: an image forming unit configured to form an adjustment pattern on a sheet; a reading device provided further downstream than a fixing member in a conveyance direction, and configured to read the sheet on which the adjustment pattern has been fixed by the fixing member; and a processor configured to: detect a length, in the conveyance direction, of the sheet; and adjust a position, in the conveyance direction, and a size, in the conveyance direction, of an image to be formed on the sheet by the image forming unit, based on a reading result obtained by the reading device reading the sheet and the detected length.

An image forming apparatus includes a rotatable image bearing member, an image forming portion, a transfer portion, a cleaning blade, and a controller configured to carry out control so as to execute a predetermined cleaning operation At least in a predetermined range of a leading end portion of the predetermined toner image with respect to a first direction which is a surface movement direction of the image bearing member, when the predetermined toner image is viewed per unit area of 1 mm in each of the first direction and a second direction perpendicular to the first direction, the predetermined toner image includes a plurality of print portions extending along a predetermined direction and formed at different positions with respect to the second direction, and the predetermined direction forms an angle of 30 or less between itself and the first direction.

An image-forming apparatus employing an electrophotographic method that scans a surface of an image carrier with multi-beams emitted from a plurality of light emitting elements based on image data includes a density smoothing processor that performs a density smoothing process to smooth a density level difference of an image subjected to electronic bow correction, a density correction processor that performs density correction on the image subjected to the bow correction by light amount correction of a surface-crossing exposure segment, and a light emitting element driver controller that controls light emission of a plurality of light emitting elements of a light beam emitter based on the image data subjected to the density smoothing process and a control signal subjected to the density correction.

Disclosed is an image forming apparatus for forming an image on a sheet, the image forming apparatus including an image forming unit configured to form an image on a photosensitive member with the photosensitive member rotating, and transfer the image formed on the photosensitive member onto the sheet to form the image on the sheet, a reading unit configured to read a measurement image formed on the sheet by the image forming unit, the measurement image including a first detection image for detecting density at positions different in an axial direction of a rotation axis of the photosensitive member of an image to be formed on the photosensitive member; and a second detection image for detecting density at positions different in a rotation direction of the photosensitive member of an image to be formed on the photosensitive member.

Disclosed is an image forming apparatus configured to form an image on a sheet including an image forming unit configured to expose a photosensitive member with laser light, while the photosensitive member is rotating, to form an electrostatic latent image to develop the electrostatic latent image formed on the photosensitive member, a sensor configured to detect a pattern image formed by the image forming unit, and a controller configured to suppress density unevenness in a rotation direction of the photosensitive member of an image to be formed by the image forming unit, based on detection results which are obtained by the sensor and correspond to different positions of the pattern image in the rotation direction.

An image forming apparatus includes: a setting unit configured to set an exposure luminance; and a processing unit configured to generate first image data, which is a set of bit data for controlling emission or non-emission of light-emitting elements of a exposure head, and second image data, which is obtained by increasing/decreasing light-emitting elements that emit light in the first image data. The processing unit is configured to generate the second image data by increasing/decreasing, in a first region, which excludes an edge region inside a region in which pieces of bit data indicating emission are contiguous in the first image data, bit data indicating emission, according to a ratio of a setting value of the exposure luminance and a reference value of the exposure luminance.