Abstract: An image forming apparatus includes a conversion unit to convert image data based on a conversion condition, an image forming unit to form an image based on an image data converted by the conversion unit, and a control unit to execute first calibration in which both a first conversion condition for a first speed and a second conversion condition for a second speed are generated based on a detection result of a first pattern that is formed at the first speed, with the first calibration being executed at initial installation of the apparatus, and execute second calibration in which the second conversion condition is generated based on a detection result of a second pattern that is formed at the second speed, with the second calibration being not executed at the initial installation of the apparatus.

Abstract: An image forming apparatus includes: a conversion unit configured to convert image data based on a conversion condition; an image forming unit configured to form an image based on an image data converted by the conversion unit; and a control unit configured to: execute first calibration in which both a first conversion condition for a first speed and a second conversion condition for a second speed are generated based on a detection result of a first pattern that is formed at the first speed, the first calibration being executed at initial installation of the apparatus; and execute second calibration in which the second conversion condition is generated based on a detection result of a second pattern that is formed at the second speed, the second calibration being not executed at the initial installation of the apparatus.

Abstract: An image forming apparatus includes an image forming unit to form an image based on an image forming condition and a controller. The controller determines information related to a density of an image to be formed by the image forming unit; generates the image forming condition based on the information; acquires measurement data outputted from a sensor related to a test image; determines, based on a first determination condition, first information related to a density of the test image; determines, based on a second determination condition, second information related to a density of the test image; and selects the determination condition from among a plurality of determination conditions including the first determination condition and the second determination condition.

Abstract: An image forming apparatus comprises an image forming unit; a sensor that measures a measurement image; and a controller. The controller controls the image forming condition based on a measurement result of measuring a first measurement image; acquires information having a correlation to density variation of images to be formed by the image forming unit; controls the image forming condition based on the information; determines a first value regarding a density of an image to be formed, based on a measurement result of measuring a second measurement image; determines a second value regarding a density of the image to be formed by the image forming unit, based on the information; and controls a timing at which the image forming unit next forms the first measurement image, based on the first value and the second value.

Abstract: An image forming apparatus is provided. The apparatus comprises an image forming unit to form an image based on an image forming condition and a controller. The controller determines information related to a density of an image to be formed by the image forming unit; generates the image forming condition based on the information; acquires measurement data outputted from a sensor related to a test image; determines, based on a first determination condition, first information related to a density of the test image; determines, based on a first determination condition, second information related to a density of the test image; and selects the determination condition from among a plurality of determination conditions including the first determination condition and the second determination condition.

Abstract: An image forming apparatus comprises an image forming unit; a sensor that measures a measurement image; and a controller. The controller controls the image forming condition based on a measurement result of measuring a first measurement image; acquires information having a correlation to density variation of images to be formed by the image forming unit; controls the image forming condition based on the information; determines a first value regarding a density of an image to be formed, based on a measurement result of measuring a second measurement image; determines a second value regarding a density of the image to be formed by the image forming unit, based on the information; and controls a timing at which the image forming unit next forms the first measurement image, based on the first value and the second value.

Abstract: An information processing apparatus configured to output information to a computing apparatus configured to generate a model for determining a density of an image to be formed by an image forming apparatus, the information processing apparatus includes: an acquisition unit configured to acquire pieces of log data each relating to a measurement result of an image formed by the image forming apparatus; a reception unit configured to receive information for specifying a piece of log data to be used for generation of the model among the pieces of log data acquired by the acquisition unit; and a transmission unit configured to transmit the information to the computing apparatus.

Abstract: An image forming apparatus is provided. The apparatus comprises an image forming unit to form an image based on an image forming condition; a sensor to measure a measurement image formed by the image forming unit; and a controller to obtain information correlated with a change in density of an image to be formed by the image forming unit, control the sensor to measure the measurement image, determine first data related to density of the image to be formed by the image forming unit, determine, based on a result of measuring the measurement image, second data related to density of the image to be formed by the image forming unit, and generate the image forming condition based on a weighted average of the first data and the second data.

Abstract: An image forming apparatus includes an image forming unit having a photosensitive member, an exposure unit, and a developing unit having a developing sleeve; and a controller configured to acquire read data relating to a first test image, a second test image, and a third test image formed on a same sheet by the image forming unit, and adjust a density in a main scanning direction of an image to be formed by the image forming unit based on the read data. A first interval between the first test image and the second test image is different from a second interval between the second test image and the third test image. Each of the first interval and the second interval is different from an integral multiple of a circumferential length of the photosensitive member, and is different from an integral multiple of a circumferential length of the developing sleeve.

Abstract: An image forming apparatus includes: an image forming unit having a photosensitive member, an exposure unit, and a developing unit having a developing sleeve; and a controller configured to acquire read data relating to a first test image, a second test image, and a third test image formed on a same sheet by the image forming unit, and adjust a density in a main scanning direction of an image to be formed by the image forming unit based on the read data. A first interval between the first test image and the second test image is different from a second interval between the second test image and the third test image. Each of the first interval and the second interval is different from an integral multiple of a circumferential length of the photosensitive member, and is different from an integral multiple of a circumferential length of the developing sleeve.

Abstract: An apparatus converts image data based on a conversion condition, forms an image using a developer, measures the developer, and measures humidity. The apparatus determines a first density of an image when a mode of the apparatus changes from a power saving mode in which the apparatus cannot form an image to a normal mode in which the apparatus can form an image, from values measured, based on a first determination condition, determines a second density of an image when the apparatus has formed images on a predetermined number of sheets in the normal mode, from values measured, based on a second determination condition that is different from the first determination condition, and generates the conversion condition based on the first density and the second density.

Abstract: 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.

Abstract: An apparatus converts image data based on a conversion condition, forms an image using a developer, measures the developer, and a humidity. The apparatus determines a first density of an image when a mode of the apparatus changes from a power saving mode in which the apparatus cannot form an image to a normal mode in which the apparatus can form an image, from values measured, based on a first determination condition, determines a second density of an image when the apparatus has formed images on a predetermined number of sheets in the normal mode, from values measured, based on a second determination condition that is different from the first determination condition, and generates the conversion condition based on the first density and the second density.

Abstract: In an image forming apparatus, a first generation unit controls an image forming unit to form a first measurement image on a first sheet, controls a conveyance unit to convey the first sheet, controls the measurement unit to execute a first scan for measuring the first measurement image based on a measurement condition, adjusts the measurement condition based on a measurement result by the first scan, and controls the measurement unit to execute a second scan for measuring the first measurement image based on the adjusted measurement condition to obtain the first measurement result, and a second generation unit controls the image forming unit to form a second measurement image on a second sheet, controls the conveyance unit to convey the second sheet, and controls the measurement unit to measure the second measurement image to obtain the second measurement result.

Abstract: 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.

Abstract: Temperature of a printing medium 110 is sufficiently decreased by stopping the printing medium 110 in a discharge path, conveying the printing medium at a low speed, switching a conveyance path, or the like. If the temperature of the printing medium 110 can be sufficiently decreased, the thermochromism phenomenon is suppressed. As a result, it is possible to provide an image forming apparatus capable of achieving highly accurate color matching and color stability.

Abstract: Provided is an image forming apparatus capable of reducing the time required for calibration of an image forming condition. The image forming apparatus includes image forming portions configured to form images onto photosensitive drums, an intermediate transfer member onto which the images are sequentially transferred from the photosensitive drums, and a density detection sensor. The density detection sensor starts measuring a base surface density of the intermediate transfer member before a measurement image is formed on the intermediate transfer member. When a measurement start position of the base surface density reaches a transfer position of an image of an image forming portion located at the most upstream position in a rotation direction of the intermediate transfer member, the image forming apparatus causes the image forming portion to start forming the measurement image.

Abstract: An image forming apparatus includes a conversion unit, an image forming unit, a controller, a conveyance unit, a measurement unit, a determination unit, an adjustment unit, and a generation unit. The conversion unit converts image data based on conversion condition. The image forming unit forms and fixes an image to a sheet. The controller controls to create first and second test sheets having respective reference and measurement images. The first and second test sheets are conveyed. The test images are measured. The determination unit determines first and second information regarding positions. The adjustment unit adjusts an image forming condition based the measured test images. The conversion condition is generated based on a second measurement result. A first reference image length in a direction in which the first test sheet is conveyed is longer than a second reference image length in a direction in which the second test sheet is conveyed.

Abstract: An image forming apparatus includes a converting unit configured to convert image data based on a conversion condition; an image forming unit; a measurement unit; and a controller configured to control the image forming unit to form a plurality of measurement images including a first measurement image and a second measurement image. The controller obtains first output characteristics based on a current measurement result of the first measurement image and a previous measurement result of the second measurement image to generate the conversion condition, and the controller obtains second output characteristics based on a current measurement result of the second measurement image and a previous measurement result of the first measurement image to generate the conversion condition.

Abstract: Multiple measurement images are formed in a test chart. Reflected light from the test patterns is received by light receiving elements of a color sensor for an accumulation time that is determined for the respective test patterns. The lengths of the test patterns in the conveyance direction of the test chart are determined according to the lengths of the accumulation times for the respective test patterns.