Abstract: An electronic device includes an imaging unit, a display unit, and a control unit. The imaging unit acquires a distinction image, visualized from setup information including a set value set by a user, with respect to a parameter for picture quality adjustment to be performed by an image forming apparatus. The control unit includes a processor, and recognizes, when the processor executes a control program, the setup information on a basis of the distinction image acquired by the imaging unit, and causes the display unit to display a first image formed by subjecting a sample image to the picture quality adjustment, according to the set value included in the setup information, and a second image formed by subjecting the sample image to the picture quality adjustment, according to a set value different from the set value included in the setup information.

Abstract: A display device includes a controller, a display, and a display controller. The controller generates an augmented reality image based on an image displayed on a screen of an external terminal display device and a size of a screen area of the screen. The augmented reality image corresponds to the image. The display displays the augmented reality image so that the image is viewed by a user through augmented reality. The display controller controls displaying by the display. The controller generates an augmented reality image including an excess region when a size of an overall area of the image is larger than the size of the screen area. The excess region is a portion of the overall area and corresponds to an excess from the size of the screen area. The display controller directs the display to display the excess region outside the screen area.

Abstract: An electronic device includes an imaging unit, a display unit, and a control unit. The imaging unit acquires a distinction image, visualized from setup information including a set value set by a user, with respect to a parameter for picture quality adjustment to be performed by an image forming apparatus. The control unit includes a processor, and recognizes, when the processor executes a control program, the setup information on a basis of the distinction image acquired by the imaging unit, and causes the display unit to display a first image formed by subjecting a sample image to the picture quality adjustment, according to the set value included in the setup information, and a second image formed by subjecting the sample image to the picture quality adjustment, according to a set value different from the set value included in the setup information.

Abstract: A display device includes a controller, a display, and a display controller. The controller generates an augmented reality image based on an image displayed on a screen of an external terminal display device and a size of a screen area of the screen. The augmented reality image corresponds to the image. The display displays the augmented reality image so that the image is viewed by a user through augmented reality. The display controller controls displaying by the display. The controller generates an augmented reality image including an excess region when a size of an overall area of the image is larger than the size of the screen area. The excess region is a portion of the overall area and corresponds to an excess from the size of the screen area. The display controller directs the display to display the excess region outside the screen area.

Abstract: An image forming apparatus includes a table generating unit. The table generating unit, in a Voronoi diagram, obtains empty circles as circles centered at Voronoi seeds of ends of Voronoi sides that intersect with a straight line passing through a largest saturation color and a smallest-saturation and specific-lightness color and passes through generatrices. After the table generating unit sets one of the generatrices shared by the two adjacent empty circles whose radius ratio is outside a specific range as a target point, and causes the radius ratio of the two empty circles to be within the specific range by changing at least one radius of the two empty circles, the table generating unit generates the conversion table that sets a color that corresponds to an intersection point corresponding to the target point among the intersection points of the two empty circles, as the definition colors.

Abstract: An image forming apparatus includes a table generating unit. The table generating unit determines whether a target-value Voronoi region and a measured-value Voronoi region are identical or not. The table generating unit sets an output color value associated with a print position where the target-value Voronoi region and the measured-value Voronoi region are identical in the second color conversion table as the output color value associated with a specific input color value in the first color conversion table. The table generating unit sets the output color value associated with the print position where the target-value Voronoi region and the measured-value Voronoi region are different in the second color conversion table as a color value that is a color value in the hue plane and is different from the output color value associated with the specific input color value in the first color conversion table.

Abstract: A display device includes a first reception unit, a determination unit, and a display control unit. The first reception unit receives a request for display of a plurality of lists. The determination unit determines, when the first reception unit receives the request for display, whether or not it is possible to display all of items in a display area of a display screen in an arrangement direction of the items for each of the lists. The display control unit performs, in sequentially displaying the plurality of lists in the display area, control such that, for the list for which the determination unit has determined that it is not possible to display all of the items, all of the items in the list are displayed once, and then, only some of the items are displayed.

Abstract: An image forming apparatus includes: an economy mode color conversion section that converts, in printing execution in the economy mode by the image forming apparatus, colors of the image based on an economy mode color conversion table; and the economy mode color correction section that corrects at least one of the two colors in the image the colors of which have not yet been converted by the economy mode color conversion section. When Voronoi regions respectively corresponding to the two colors in an economy mode Voronoi diagram are the same regions under condition that Voronoi regions respectively corresponding to the two colors in a normal mode Voronoi diagram are different regions, the economy mode color correction section corrects the at least one of the two colors in a manner such that the Voronoi regions respectively corresponding to the two colors in the economy mode Voronoi diagram become different regions.

Abstract: An image forming apparatus includes a color conversion unit, a representative-hue-range acquiring unit, and a color correction unit. In a Voronoi diagram based on a grid point of the color conversion table with respect to one hue range of the two representative hue ranges obtained by the representative-hue-range acquiring unit, when a movement pixel corresponds most to a Voronoi region where the pixels inside the one hue range in the specific part corresponds most, the movement pixel being a pixel inside the other hue range of the two representative hue ranges in the specific part with only the hue of the pixel being moved to the one hue range, the color correction unit corrects color of the image inside the other hue range in the specific part such that the movement pixel does not correspond to the Voronoi region.

Abstract: An image forming apparatus includes a table generating unit. The table generating unit, in a Voronoi diagram, obtains empty circles as circles centered at Voronoi seeds of ends of Voronoi sides that intersect with a straight line passing through a largest saturation color and a smallest-saturation and specific-lightness color and passes through generatrices. After the table generating unit sets one of the generatrices shared by the two adjacent empty circles whose radius ratio is outside a specific range as a target point, and causes the radius ratio of the two empty circles to be within the specific range by changing at least one radius of the two empty circles, the table generating unit generates the conversion table that sets a color that corresponds to an intersection point corresponding to the target point among the intersection points of the two empty circles, as the definition colors.

Abstract: An image forming apparatus includes a table generating unit. The table generating unit determines whether a target-value Voronoi region and a measured-value Voronoi region are identical or not. The table generating unit sets an output color value associated with a print position where the target-value Voronoi region and the measured-value Voronoi region are identical in the second color conversion table as the output color value associated with a specific input color value in the first color conversion table. The table generating unit sets the output color value associated with the print position where the target-value Voronoi region and the measured-value Voronoi region are different in the second color conversion table as a color value that is a color value in the hue plane and is different from the output color value associated with the specific input color value in the first color conversion table.

Abstract: A color converter includes a printing color value determining unit and a determination color value calculating unit. The determination color value calculating unit calculates a determination color value in such a way that a positional relationship of a input color value relative to a input peak value, a white color value showing a color value of white, and a black color value showing a color value of black is equal to a positional relationship of the determination color value relative to the determination peak value, the white color value, and the black color value. The printing color value determining unit determines, as a printing color value, the representative color value closest to the determination color value calculated by the determination color value calculating unit in the Voronoi diagram.

Abstract: An image forming apparatus includes: an economy mode color conversion section that converts, in printing execution in the economy mode by the image forming apparatus, colors of the image based on an economy mode color conversion table; and the economy mode color correction section that corrects at least one of the two colors in the image the colors of which have not yet been converted by the economy mode color conversion section. When Voronoi regions respectively corresponding to the two colors in an economy mode Voronoi diagram are the same regions under condition that Voronoi regions respectively corresponding to the two colors in a normal mode Voronoi diagram are different regions, the economy mode color correction section corrects the at least one of the two colors in a manner such that the Voronoi regions respectively corresponding to the two colors in the economy mode Voronoi diagram become different regions.

Abstract: An image forming apparatus includes a color conversion unit, a representative-hue-range acquiring unit, and a color correction unit. In a Voronoi diagram based on a grid point of the color conversion table with respect to one hue range of the two representative hue ranges obtained by the representative-hue-range acquiring unit, when a movement pixel corresponds most to a Voronoi region where the pixels inside the one hue range in the specific part corresponds most, the movement pixel being a pixel inside the other hue range of the two representative hue ranges in the specific part with only the hue of the pixel being moved to the one hue range, the color correction unit corrects color of the image inside the other hue range in the specific part such that the movement pixel does not correspond to the Voronoi region.

Abstract: An image forming apparatus includes a print device, a spectral reflectance acquiring unit, and a tone-correction-data generation unit. The print device prints a chart including patches of a plurality of tones of color. The spectral reflectance acquiring unit acquires a spectral reflectance for the patches in the chart printed by the print device. The tone-correction-data generation unit generates tone-correction data for correction of tone characteristics of the print device. The tone-correction-data generation unit generates the tone-correction data based on the spectral reflectances in a range of specific partial wavelengths among the spectral reflectances in the range of whole wavelengths acquired by the spectral reflectance acquiring unit.

Abstract: A color converter includes a printing color value determining unit and a determination color value calculating unit. The determination color value calculating unit calculates a determination color value in such a way that a positional relationship of a input color value relative to a input peak value, a white color value showing a color value of white, and a black color value showing a color value of black is equal to a positional relationship of the determination color value relative to the determination peak value, the white color value, and the black color value. The printing color value determining unit determines, as a printing color value, the representative color value closest to the determination color value calculated by the determination color value calculating unit in the Voronoi diagram.

Abstract: A halftone dot addition device for adding halftone dots to halftone dot images includes an empty circle information acquiring unit and a halftone dot addition unit. The empty circle information acquiring unit obtains, in a Voronoi diagram having a generatrix corresponding to a halftone dot in a halftone dot image. The radius of an empty circle is a circle centering on a Voronoi vertex. The empty circle passes through the generatrix but not internally includes the generatrix. The halftone dot addition unit, if the radius of a target circle being the empty circle obtained, as a target, by the empty circle information acquiring unit is larger than a specific value, adds to the halftone dot image a halftone dot corresponding to a new generatrix, by adding the new generatrix to the inside of the target circle.

Abstract: An image forming apparatus includes a print device, a spectral reflectance acquiring unit, and a tone-correction-data generation unit. The print device prints a chart including patches of a plurality of tones of color. The spectral reflectance acquiring unit acquires a spectral reflectance for the patches in the chart printed by the print device. The tone-correction-data generation unit generates tone-correction data for correction of tone characteristics of the print device. The tone-correction-data generation unit generates the tone-correction data based on the spectral reflectances in a range of specific partial wavelengths among the spectral reflectances in the range of whole wavelengths acquired by the spectral reflectance acquiring unit.

Abstract: A color conversion device includes: a hue acquisition unit that acquires a hue of a second target color having the same lightness and the same chroma as a first target color within Voronoi diagrams in which predefined colors defined in a color conversion table are set as generator points; a side group acquisition unit that acquires side groups that are two groups located on both sides of the first target color in terms of the hue, based on a hue of the first target color and the hue of the second target color; and a color conversion unit that acquires a third target color by converting the first target color from a color in a color system before conversion into a color in a color system after the conversion based on the predefined colors of the side groups acquired by the side group acquisition unit and the first target color.

Abstract: A halftone dot addition device for adding halftone dots to halftone dot images includes an empty circle information acquiring unit and a halftone dot addition unit. The empty circle information acquiring unit obtains, in a Voronoi diagram having a generatrix corresponding to a halftone dot in a halftone dot image. The radius of an empty circle is a circle centering on a Voronoi vertex. The empty circle passes through the generatrix but not internally includes the generatrix. The halftone dot addition unit, if the radius of a target circle being the empty circle obtained, as a target, by the empty circle information acquiring unit is larger than a specific value, adds to the halftone dot image a halftone dot corresponding to a new generatrix, by adding the new generatrix to the inside of the target circle.