An image forming apparatus includes a photosensitive member that rotates at a first speed, an intermediate transfer member that rotates at a second speed lower than the first speed, and a collecting member disposed in a state in which a fixed surface is pressed against the rotating intermediate transfer member. The collecting member collects toner remaining on the intermediate transfer member after a toner image is secondarily transferred from the intermediate transfer member to a transfer material.

First correction data for use in a first printing mode is generated by image density measurement in the first printing mode, and second correction data for use in a second printing mode, which is different from the first printing mode in peripheral speed ratio of a developing roller to a photosensitive drum, is generated by image density measurement in the second printing mode. First processing for generating first and second correction data for the first and second printing modes, respectively, by density measurement, or second processing for generating the first correction data by density measurement and generating the second correction data using the generated first correction data and a difference in image density between the first printing mode and the second printing mode is executed. The first processing is executed when a predetermined condition is satisfied.

Density unevenness occurs in an output image in the scanning direction of a laser beam because the amount of the laser beam reaching the surface of the photoreceptor is different for each position in the scanning direction of the laser beam.

The exposure amount (integrated light amount) per unit area on the photoreceptor is controlled to be substantially uniform by controlling the pulse widths of PWM signals according to the exposure positions of the laser beam, based on exposure amount correction data set according to the positions of the laser beam in the scanning direction.

An image forming apparatus includes: a specification unit configured to perform surface specification processing for specifying a reflective surface that deflects light; a correction unit configured to perform correction processing for correcting image data in accordance with which reflective surface deflects light; and a control unit configured to control so as to cause scanning of a first photosensitive member to start before the surface specification processing completes, and control so as to, after the surface specification processing completes, cause the correction processing to be performed, with respect to image data for causing light to be emitted from a second light source and in accordance with a specification result of the surface specification processing, and cause scanning of the second photosensitive member to start.

An image forming apparatus, for performing image forming by transferring and fixing an image formed on an image carrier to a printing material, that selects a smallest dot size of a halftone dot pattern representing a halftone of a highlight region corresponding to a type of the printing material, and uses a screen representing the selected smallest dot size to perform exposure control of the image carrier.

An image forming apparatus includes: a unit configured to form an electrostatic latent image using a plurality of scan lines on a photosensitive body by, on a basis of an image signal, performing scanning of the photosensitive body in a main scan direction using one or more scanning beams repeatedly in a sub-scan direction orthogonal to the main scan direction; and a unit configured to store start position information indicating start positions in the main scan direction of the plurality of scan lines. In a case where scan positions in the sub-scan direction of the plurality of scan lines are linearly shifted relative to a target position with a period of N number of scan lines, the start position information indicates to linearly shift the start positions of N scan lines in the main scan direction along the sub-scan direction.

An image forming apparatus includes a photosensitive member that rotates at a first speed, an intermediate transfer member that rotates at a second speed lower than the first speed, and a collecting member disposed in a state in which a fixed surface is pressed against the rotating intermediate transfer member. The collecting member collects toner remaining on the intermediate transfer member after a toner image is secondarily transferred from the intermediate transfer member to a transfer material.

An image forming apparatus includes: a correction unit configured to correct a tone of each pixel in first image data in accordance with an image height on a photosensitive member, and output second image data; a halftone processing unit configured to determine exposed regions of pixels in an image by applying halftone processing to the second image data; and a scanning unit configured to form a latent image by scanning the photosensitive member with light that changes in scanning speed in accordance with an image height based on the exposed regions of the pixels. The scanning unit is further configured to perform partial exposure with respect to the pixels based on the exposed regions of the pixels, the partial exposure exposing partial regions of the pixels to light unlike entire exposure that exposes entire regions of the pixels to light.

An image processing apparatus for generating data for overlappingly forming a first image including a boundary between a plurality of areas representing different gloss characteristics and a second image having a plurality of areas including a plurality of pixels, on a recording medium includes an acquisition unit configured to acquire first image data representing gloss characteristics of the first image and second image data representing color characteristics of the second image, and a conversion unit configured to convert colors represented by respective pixels of the areas in the second image into one color out of the colors represented by the respective pixels of the areas, based on the first image data, in which the areas in the second image correspond to areas obtained by dividing the first image into a plurality of areas, and include a part of the area corresponding to the boundary in the second image.

An electrophotographic image forming apparatus that scans a surface of an image carrier with multiple beams emitted from a plurality of light emitting elements on a basis of image data of multiple colors including black comprises a bow corrector that performs electronic bow correction of image data of a predetermined color other than black in accordance with a bow characteristic of black; and a density smoothing processor that smoothens a density level difference of an image of the predetermined color subjected to the bow correction by a density smoothing process.