An image forming apparatus includes an image forming device, an image density detector, and a processor. The processor controls the image forming device to form a first test toner image, and controls the image density detector to detect an image density at the plurality of positions of the first test toner image. The processor adjusts an image forming condition so that the image density detected at each of the plurality of positions becomes a target image density, controls the image forming device to form a second test toner image based on the adjusted image forming condition, controls the image density detector to detect an image density at the plurality of positions of the second test toner image, determines whether a streak exists in the second test toner image based on the detected image densities, and executes a countermeasure to prevent an occurrence of the streak.

An image forming apparatus operable at a plurality of image forming speeds includes a pattern detection unit configured to detect a registration correction pattern at a first image forming speed, a writing start timing determination unit configured to determine writing start timing at which an electrostatic latent image is started to be written on a photosensitive member by a light beam emitted from a light source, and a storage unit configured to store in advance a correction amount for correcting the writing start timing. When the image forming apparatus operates at the first image forming speed set in advance, an image is formed at the writing start timing determined by the writing start timing determination unit. When the image forming apparatus operates at a second image forming speed, an image is formed at a writing start timing corrected based on the correction amount and a speed ratio.

The image processing apparatus measures a density of a first test chart printed using first pattern data obtained by binarizing multi-value patch pattern data with a first resolution, converts the first pattern data into second pattern data with a second resolution, and measures a density of a second test chart printed using the second pattern data. The apparatus obtains difference correction data for correcting differences between the densities of the first and second test charts, corrects the density of the multi-value patch pattern data with the first resolution based on the difference correction data, and generates test chart data including a first pattern obtained by converting pattern data obtained by binarizing the corrected multi-value patch pattern data into pattern data with the second resolution and a second pattern obtained by binarizing multi-value patch pattern data with the second resolution.

An information processing device includes a controller that, when a user operates a device image associated with a device and a function image associated with a function, controls display of a linkage function executable using the device and the function. In a further modification of the invention, the device image may be a captured image generated by capturing the device.

The image processing apparatus of the present invention includes: an edge determination unit configured to detect an edge pixel to which a white pixel and a black pixel are adjacent in a first direction in an image in which each pixel is represented as a white pixel or a black pixel; a first detection unit configured to detect a number of consecutive pixels up to the edge pixel in the first direction in the image; a second detection unit configured to detect a number of consecutive pixels whose number of consecutive pixels in the first direction is larger than a first threshold in a second direction perpendicular to the first direction in the image; and a type determination unit configured to determine a type of the edge pixel based on detection results by the first detection unit and detection results by the second detection unit.

An image forming apparatus includes an image forming unit configured to form an image, a reference member, a sensor including a substrate, a light-emitting element provided on the substrate, a light-receiving element provided on the substrate, and a blocking member provided between the light-emitting element and the light-receiving element on the substrate, the sensor configured to output an output value based on a light reception result of the light-receiving element, a memory storing data related to a relationship between a measurement condition and an offset value, and a controller configured to control the sensor based on a plurality of measurement conditions to acquire an output value corresponding to a measurement result of reflected light from the reference member, and determine a measurement condition for measuring the image based on the acquired output value and the data stored in the memory.

An intermediate transfer belt (image bearing member) includes a base material layer and a surface layer disposed on the base material layer and including an inorganic oxide containing an organic component. A ten-point average roughness of the surface layer is 69% or more of a wavelength of incident light emitted from a sensor for detecting an amount of toner adhering to the image bearing member and less than 20% of an average particle size of the toner.

An image forming apparatus includes a latent image bearer; a writing device configured to write a latent image onto the latent image bearer; a detection device configured to detect, at a plurality of positions, a density of a toner image obtained through development of the latent image; and a controller configured to correct a writing intensity of the writing device to correct an uneven density based on detection values of the detection device. The controller determines whether each of the detection values is pass or fail. In response to a determination that a detection value is fail, the controller corrects the wiring intensity based on another detection value determined to be pass at a position different from a position at which the detection value is determined to be fail, instead of correcting the writing intensity based on the detection value determined to be fail.

There is provided a printing apparatus. The printing apparatus includes: a memory storing a program; and at least one hardware processor configured to execute a process in the program. The process includes: performing pre-printing of overprinting which is an operation of performing pre-printing on a medium and then performing post-printing on the medium; and printing a chart asymmetric with respect to rotation toward a direction of the medium on the medium during test printing related to the pre-printing.

In an image forming apparatus, when images are formed on a plurality of sheets, a controller controls an image forming unit to form a measurement image between an image which is to be transferred to a first sheet of the plurality of sheets and an image which is to be transferred to a second sheet of the plurality of sheets, controls a sensor to measure the measurement image, determines a feedback condition based on a length of each of the plurality of sheets in a conveyance direction, and controls an image forming condition based on a result of measurement performed by the sensor and the determined feedback condition, wherein the image which is to be transferred to the second sheet of the plurality of sheets is adjacent to the image which is to be transferred to the first sheet of the plurality of sheets on an image bearing member.