Abstract: A non-transitory computer readable medium storing a program causing a computer, which reproduces a color tone of a printed matter and displays the color tone on a screen before printing, to realize a function of acquiring a density value of a color material that develops a color by absorption of a specific wavelength component and a property of paper related to the absorption of the specific wavelength component, and a function of displaying an image that reproduces the color tone of the printed matter based on the density value and the property of the paper.

Abstract: A non-transitory computer readable medium storing a program causing a computer, which reproduces a color tone of a printed matter and displays the color tone on a screen before printing, to realize a function of generating an image in which the color tone of the printed matter is reproduced based on a first component reflected by a metallic color material and a second component transmitted through the color material and reflected by paper.

Abstract: A non-transitory computer readable recording medium records program for causing a computer that reproduces an image of a printed matter before printing and displays the image on a screen to implement: a changing function of, in a case where a first image generated according to a density value of a color material and a second image representing a surface of a sheet to be used for printing are combined to generate an image of a printed matter, changing appearance of the second image, according to a total amount of the color material to be used for printing the corresponding first image, for each pixel position.

Abstract: A non-transitory computer readable medium storing a program causing a computer, which reproduces a color tone of a printed matter and displays the color tone on a screen before printing, to realize a function of acquiring a density value of a color material that develops a color by absorption of a specific wavelength component and a property of paper related to the absorption of the specific wavelength component, and a function of displaying an image that reproduces the color tone of the printed matter based on the density value and the property of the paper.

Abstract: An image forming apparatus includes a print mechanism, an obtaining unit that obtains measurement information of gradation characteristics of the print mechanism for a specific color material, and a generating unit that generates correction information for a print density of the specific color material in accordance with the measurement information. The correction information specifies that a corrected density with respect to an input density increases monotonically in a range of densities from a correction start density to a maximum density, and the correction start density is determined in accordance with a density where gradation starts to attenuate in the measurement information.

Abstract: An image forming apparatus includes a print mechanism, an obtaining unit that obtains measurement information of gradation characteristics of the print mechanism for a specific color material, and a generating unit that generates correction information for a print density of the specific color material in accordance with the measurement information. The correction information specifies that a corrected density with respect to an input density increases monotonically in a range of densities from a correction start density to a maximum density, and the correction start density is determined in accordance with a density where gradation starts to attenuate in the measurement information.

Abstract: An image forming apparatus includes two or more photoconductors, an image carrier, first and second transfer units, first and second measuring units, and a determining unit. The first measuring unit measures density of a first test image formed by using a toner of a first color and transferred from the image carrier to a medium. The second measuring unit measures density of a toner on a topmost layer of a second test image formed by superposing plural toners of different colors and transferred from the image carrier to the medium. The determining unit determines whether an appropriate value of the second transfer voltage has increased or decreased over time from a currently applied second transfer voltage, in accordance with a change in the density measured by the first measuring unit during a certain period and a change in the density measured by the second measuring unit during the certain period.

Abstract: A color management system includes a measurement unit and a controller. The measurement unit measures a color difference between multiple colorimeters by using at least one detection color patch in accordance with colorimetry conditions used for the colorimeters. The controller generates, in a case where the color difference between the colorimeters is equal to or higher than a threshold for the detection color patch, a correction profile for correcting the color difference between the colorimeters.

Abstract: A color management system includes a memory and a controller. The memory stores a correction profile for a first medium, the correction profile being provided for correcting a difference between multiple colorimeters. The controller uses, as an evaluation index and on a basis of a result of colorimetry performed on a second medium that is different from the first medium, at least one of a color difference, a hue difference, or a lightness difference between the first medium and the second medium and uses the correction profile for the first medium as a correction profile for the second medium in a case where the evaluation index is equal to or lower than a corresponding one of thresholds.

Abstract: An image forming apparatus includes an image forming unit in which multiple chips including multiple light emitting elements are arranged in a main scanning direction, the image forming unit forming an image on a recording medium, a reading unit that reads the image fixed on the recording medium by a fixing unit, a density specification unit that specifies a density of a region in the image for each of the chips, the region corresponding to each of the chips, a correction amount specification unit that specifies a correction amount of light quantity from the chip based on an approximate value obtained by approximating the density of a region corresponding to a chip arranged in a predetermined range from a chip for which the correction amount of the light quantity is specified, and a correction unit that corrects the light quantity in accordance with the correction amount.

Abstract: An image forming apparatus includes two or more photoconductors, an image carrier, first and second transfer units, first and second measuring units, and a determining unit. The first measuring unit measures density of a first test image formed by using a toner of a first color and transferred from the image carrier to a medium. The second measuring unit measures density of a toner on a topmost layer of a second test image formed by superposing plural toners of different colors and transferred from the image carrier to the medium. The determining unit determines whether an appropriate value of the second transfer voltage has increased or decreased over time from a currently applied second transfer voltage, in accordance with a change in the density measured by the first measuring unit during a certain period and a change in the density measured by the second measuring unit during the certain period.

Abstract: A color management system includes a memory and a controller. The memory stores a correction profile for a first medium, the correction profile being provided for correcting a difference between multiple colorimeters. The controller uses, as an evaluation index and on a basis of a result of colorimetry performed on a second medium that is different from the first medium, at least one of a color difference, a hue difference, or a lightness difference between the first medium and the second medium and uses the correction profile for the first medium as a correction profile for the second medium in a case where the evaluation index is equal to or lower than a corresponding one of thresholds.

Abstract: An image forming apparatus includes an image forming unit in which multiple chips including multiple light emitting elements are arranged in a main scanning direction, the image forming unit forming an image on a recording medium, a reading unit that reads the image fixed on the recording medium by a fixing unit, a density specification unit that specifies a density of a region in the image for each of the chips, the region corresponding to each of the chips, a correction amount specification unit that specifies a correction amount of light quantity from the chip based on an approximate value obtained by approximating the density of a region corresponding to a chip arranged in a predetermined range from a chip for which the correction amount of the light quantity is specified, and a correction unit that corrects the light quantity in accordance with the correction amount.

Abstract: A color management system includes a measurement unit and a controller. The measurement unit measures a color difference between multiple colorimeters by using at least one detection color patch in accordance with colorimetry conditions used for the colorimeters. The controller generates, in a case where the color difference between the colorimeters is equal to or higher than a threshold for the detection color patch, a correction profile for correcting the color difference between the colorimeters.

Abstract: A correcting apparatus includes a first acquiring unit that acquires a target characteristic expressing a correspondence relationship between a gradation value and a target density of an image to be output from an output apparatus in accordance with the gradation value; a second acquiring unit that acquires an output characteristic expressing a correspondence relationship between a gradation value and a measured density of the image output from the output apparatus in accordance with the gradation value; an updating unit that updates the target characteristic by correcting the target density corresponding to a high density region including a maximum target density value when a difference between a maximum measured density value and the maximum target density value is larger than a predetermined value; and a correcting unit that corrects the gradation value so as to approximate the output characteristic to the updated target characteristic.

Abstract: A determination device includes a first instructing unit, a first acquiring unit, a correcting unit, a predicting unit, a second instructing unit, a second acquiring unit, and a determining unit. The predicting unit predicts a measurement value of a multicolor patch image included in a second patch column to be output by an image output device, the second patch column being acquired after the correcting unit corrects tone values in a first patch column. The second acquiring unit acquires the measurement value of the multicolor patch image measured by performing, by a user, an operation of a measurement device along the second patch column output by the image output device. The determining unit determines whether the operation performed by the user is appropriate on a basis of the measurement value acquired by the second acquiring unit and the measurement value predicted by the predicting unit.

Abstract: A correcting apparatus includes a first acquiring unit that acquires a target characteristic expressing a correspondence relationship between a gradation value and a target density of an image to be output from an output apparatus in accordance with the gradation value; a second acquiring unit that acquires an output characteristic expressing a correspondence relationship between a gradation value and a measured density of the image output from the output apparatus in accordance with the gradation value; an updating unit that updates the target characteristic by correcting the target density corresponding to a high density region including a maximum target density value when a difference between a maximum measured density value and the maximum target density value is larger than a predetermined value; and a correcting unit that corrects the gradation value so as to approximate the output characteristic to the updated target characteristic.

Abstract: A determination device includes a first instructing unit, a first acquiring unit, a correcting unit, a predicting unit, a second instructing unit, a second acquiring unit, and a determining unit. The predicting unit predicts a measurement value of a multicolor patch image included in a second patch column to be output by an image output device, the second patch column being acquired after the correcting unit corrects tone values in a first patch column. The second acquiring unit acquires the measurement value of the multicolor patch image measured by performing, by a user, an operation of a measurement device along the second patch column output by the image output device. The determining unit determines whether the operation performed by the user is appropriate on a basis of the measurement value acquired by the second acquiring unit and the measurement value predicted by the predicting unit.

Abstract: An image processing apparatus includes: a reception portion that receives a first image; a selection portion that selects a head to perform pre-ejection; a generation portion that includes the selected head and generates patterns for detection of a transport speed of a sheet; an output portion that synthesizes the generated patterns with the received first image to output a second image on a sheet; a reading portion that reads the second image; an extraction portion that extracts the patterns from the read second image; and a control portion that analyzes the extracted patterns and controls the transport speed of the sheet at the output portion.

Abstract: An image processing apparatus includes: a reception portion that receives a first image; a selection portion that selects a head to perform pre-ejection; a generation portion that includes the selected head and generates patterns for detection of a transport speed of a sheet; an output portion that synthesizes the generated patterns with the received first image to output a second image on a sheet; a reading portion that reads the second image; an extraction portion that extracts the patterns from the read second image; and a control portion that analyzes the extracted patterns and controls the transport speed of the sheet at the output portion.