Abstract: An image forming apparatus including an image forming unit is provided. The apparatus determines a color of a tone patch for tone correction, to be composited with an image, in accordance with a color component used in the image; generates a patch-included image by compositing the tone patch of the color determined with the image; generates a corrected image by performing tone correction on the patch-included image on the basis of tone correction information for each color component; performs color measurement of the tone patch formed on the medium on which the corrected image has been formed, and updates the tone correction information on the basis of a value measured.

Abstract: We disclose a method for printing by rotogravure, flexography, offset, inkjet or electrophotography invisible images that are viewable under UV light. The method generates juxtaposed dispersed dot halftones by first creating juxtaposed clustered dot halftones and by applying to them dispersed dot halftoning according to a blackness reduction factor. Dispersed dot halftoning is embodied by random threshold error diffusion. The resulting dispersed dot halftones comprise pixel segments located within the areas defined by the clustered dots. These pixel segments specify the areas of the cells to be engraved onto the rotogravure cylinder. For offset, they can be imaged onto an offset plate or for electrophotography, onto a photoconductor. The disclosed juxtaposed dispersed dot halftoning method can be embedded into a framework for the reproduction of fluorescent full color images with three or more invisible fluorescent inks. These invisible fluorescent color images offer a strong protection against counterfeits.

Abstract: A color conversion correction data generation device includes circuitry that acquires first chromaticity values obtained from conversion target image data and second chromaticity values of sample image data, the conversion target image data being image data to be subjected to color conversion, the sample image data being obtained by reading a printed sample; curve-fits chromaticity value correspondence data to generate color conversion correction data, the chromaticity value correspondence data being data in which the acquired first chromaticity values and the acquired second chromaticity values are associated with each other; and outputs the color conversion correction data for correcting image data obtained by subjecting the conversion target image data to the color conversion.

Abstract: An image processing apparatus includes: a first controller including first control circuitry and first power supply control circuitry; and a second controller including second control circuitry and second power supply control circuitry. The first control circuitry controls an image former. The second control circuitry controls an external interface.

Abstract: An image transmission device includes a communicator that transmits image data to an e-mail address set by a user via a network, an operation acceptor that accepts user's settings, a storage that stores, for each predetermined case, a target domain applicable to the case, and a controller that controls the communicator, the operation acceptor, and the storage. When the user sets an e-mail address to which image data are to be transmitted, the controller determines whether a domain portion of the e-mail address matches a target domain of the case, and when the domain portion matches the target domain, the controller accepts settings of the e-mail address, and when the domain portion of the e-mail address does not match the target domain of the case, the controller does not accept settings of the e-mail address.

Abstract: An image processing apparatus converts a first combination including color signals respectively corresponding to first ink, second ink, and third ink, which are input to be recorded in a first area on a recording medium into a second combination including color signals respectively corresponding to the first ink, the second ink, and the third ink, and converts a third combination including color signals respective corresponding to the first ink, the second ink, and the third ink which are input to be recorded in a second area on the recording medium into a fourth combination including color signals respectively corresponding to the first ink, the second ink, and the third ink, wherein a difference between a color of a first image and a color of a second image is reduced and a difference between a frequency of the first image and a frequency of the second image is reduced.

Abstract: An image forming apparatus includes a controller configured to receive, from an information processing apparatus, a set of print setting values, an identifier of the set, and a user identifier, register the received set of print setting values in association with the received identifier of the set and the received user identifier, and receive, from an information processing apparatus, a first request for obtaining the registered identifier of the set. The received first request includes the user identifier of a user that operates the information processing apparatus that has transmitted the first request. The controller also transmits, to the information processing apparatus that has transmitted the first request, the identifier of the set registered in association with the user identifier included in the first request, wherein the information processing apparatus that has received the identifier of the set displays a print setting screen using the received identifier of the set.

Abstract: An apparatus includes a reduction unit configured to perform color reduction processing for quantizing a color in the generated image data, a change unit configured to change, in a case where brightness of an edge pixel indicating an edge portion in an image based on the image data with the color quantized is equal to or higher than a threshold value, a pixel value of the edge pixel to a pixel value of a color of a pixel having highest brightness among pixels surrounding the edge pixel, and change, in a case where the brightness of the edge pixel is lower than the threshold value, the pixel value of the edge pixel to a pixel value of a color of a pixel having lowest brightness among the pixels surrounding the edge pixel.

Abstract: A color chart is for performing color adjustment on an image forming apparatus. The color chart includes identification information and a color adjustment patch. The identification information is on an image forming apparatus to which color adjustment is to be applied. The color adjustment patch includes a plurality of color patches for performing color adjustment on the image forming apparatus indicated by the identification information.

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 on a sheet based on the converted image data, a detection unit configured to detect a pattern image on a transfer member, a reading unit configured to read a test image formed on a sheet, a controller configured to perform calibration based on a reading result of the reading unit, and a reception unit. In a case where the calibration is performed, the controller determines an image forming condition based on a result of detection by the detection unit before the test image is formed. In a case where the reception unit receives the discontinuation instruction, the controller changes the image forming condition to an image forming condition before the pattern image is formed.

Abstract: Certain examples described herein relate to halftone level adjustment for Neugebauer Primaries (NPs). In certain examples, halftone levels for NPs are obtained for a halftone for printing an image. It is determined whether the halftone corresponds to a line or an area fill. The halftone levels may be adjusted in response to these levels exceeding a printing attribute threshold. The printing attribute threshold may be dependent on whether the halftone corresponds to a line or an area fill. The image may then be printed using the adjusted halftone levels.

Abstract: A printing device comprises a head configured to print an image having a plurality of pixels on a printing medium based on image data, an input device configured to obtain an input of designating a pixel of the image, and a controller. The controller is configured to cause the printing device to print, on a same printing medium, a first patch group containing a plurality of patches, and a second patch group containing patches corresponding to the designated pixel designated via the input device, the second patch group containing a pair of patches, a color difference of the pair of patches contained in the second patch group being smaller than a color difference of a pair of patches with a smallest color difference among the plurality of patches contained in the first patch group.

Abstract: An image forming apparatus includes an image forming portion, a first acquisition processing portion, a second acquisition processing portion, and an adjustment processing portion. The image forming portion forms an image on a sheet. The first acquisition processing portion acquires a captured image of the sheet. The second acquisition processing portion acquires a specific value that indicates a difference between a gradation value of a pixel that, among pixels included in the captured image acquired by the first acquisition processing portion, corresponds to a higher part of an outer surface of the sheet, and a gradation value of a pixel that, among the pixels included in the captured image, corresponds to a lower part that is lower than the higher part. The adjustment processing portion adjusts an image forming condition of the image forming portion based on the specific value acquired by the second acquisition processing portion.

Abstract: A non-volatile computer-readable storage medium stores a prescribed program that causes a computer to execute a method including displaying a content to be printed based on print data, and executing, in a case where the print data does not include an object corresponding to first RGB values, a prescribed notification based on the print data not including the object corresponding to first RGB values even though a first setting is being activated, with the first setting being to print a first print region corresponding to the first RGB values in a print target image by using a first color represented by use of at least a specific color ink being an ink of a color other than a process color, and not executing, in a case where the first setting is being activated and the print data includes the object corresponding to the first RGB values, the prescribed notification.

Abstract: In a printing system including a printing apparatus and a server that manages information about the printing apparatus, the printing apparatus transmits, to the server, monitoring information indicating a usage state of the printing apparatus. In a case where the server determines that the usage state of the printing apparatus satisfies a predetermined condition based on the monitoring information received from the printing apparatus, the server delivers, to the printing apparatus, a device setting to prohibit reception of a print job without going through the server. In a case where the printing apparatus receives the delivered device setting, the printing apparatus prohibits the reception of the print job without going through the server.

Abstract: An information processing apparatus is provided. The apparatus comprises at least one memory; and at least one processor, wherein the at least one memory stores at least one program that causes the at least one processor to perform operations including acquiring, periodically, in response to a request, or both, a color verification result of a printed article printed by an image forming apparatus from a storage storing a color measurement result of a printed article printed by the image forming apparatus, and in a case where the color verification result for the image forming apparatus to execute an instructed image forming satisfies a reference, executing the instructed image forming.

Abstract: An image processing apparatus includes a control unit configured to control execution of monochromatic calibration and multi-color calibration, and a registration unit configured to register paper types of paper to be used at time of execution of the monochromatic calibration, a monochromatic target value set for each of the paper types used for the monochromatic calibration, paper types of paper to be used at time of execution of multi-color calibration, and a multi-color target value set for each of the paper types used for the multi-color calibration. The image processing apparatus executes the multi-color calibration, after executing the monochromatic calibration, via the control unit by using paper of a paper type selected from common paper types out of the registered paper types and the monochromatic target value and the multi-color target value set for the selected paper type.

Abstract: Relative calibration is used to generate tone reproduction curves (TRCs) at multiple printing devices. A first calibration is performed for a first paper at a first printing device to generate a first TRC. A second calibration is performed for the first paper at a second printing device to generate a second TRC. A third calibration is performed for a second paper at the first printing device to generate a third TRC. A device difference dataset is determined using the first TRC and the second TRC. A paper difference dataset is determined using the first TRC and the third TRC. The device difference dataset and the paper difference dataset are used to determine a fourth TRC for the second paper at the second printing device, thereby eliminating the need for further calibration operations.

Abstract: In a case where a color space that is specified by a specification unit is a predetermined color space corresponding to information that is held in advance before an image processing apparatus obtains image data, even if obtained predetermined information includes color conversion information for converting the color space of the obtained image data into another color space, a conversion unit converts the color space of the obtained image data by use of the information that is held in advance before the image processing apparatus obtains the image data, without using the color conversion information that is included in the obtained predetermined information.

Abstract: A liquid discharge apparatus, a method of discharging liquid, and a recording medium storing a program for causing a computer to execute the method. The liquid discharge apparatus and the method includes obtaining image data to be printed, performing dithering to achieve masking and halftone processing on the image data to generate print data, and controlling movement of a discharge head and discharge of ink based on the print data. The controlling includes increasing a ratio of a number of ink dots continuously discharged onto a recording medium in a grayscale on a shadow side to a total number of ink dots discharged onto the recording medium in one-time scanning by the discharge head in one line to be greater than a ratio of a number of ink dots continuously discharged onto the recording medium in a grayscale on a highlight side to the total number of ink dots.