Abstract: One aspect of the invention is a printing apparatus, comprising a printhead including first and second nozzle arrays, and print control means for performing printing by driving the printhead while reciprocally moving it as a serial head, wherein the first nozzle array discharges a color ink, the second nozzle array discharges a reaction liquid, for each of a forward path and a backward path, an adjustment pattern is formed by overlaying a pattern of the reaction liquid and a pattern of the color ink, and, in a case of forming the adjustment pattern in the backward path, an underlying pattern is further formed by the second nozzle array in a preceding forward path.

Abstract: An inkjet printing apparatus includes a print head to print an image by ejecting a colorant-containing colored ink and a colorant-coagulation reaction liquid onto a print medium, a printer unit to cause the print head to print test patterns on the print medium by correspondingly printing first pattern images with a predetermined volume of the colored ink and second pattern images with different volumes of the reaction liquid, a dryer unit to dry the test patterns on the print medium during printing of the test patterns on the print medium under control of the printer unit, an obtaining unit to obtain print information concerning print results of the test patterns, and a determination unit to determine a volume of the reaction liquid and a drying condition for the dryer unit for printing on the print medium based on the print information obtained by the obtaining unit.

Abstract: Two areas having different application amounts of chromatic color ink are disposed adjacent to each other, and an amount of reactive liquid is appropriately determined in accordance with a print result of a test pattern in which an amount of reactive liquid is varied.

Abstract: One embodiment is a printing apparatus comprising: a conveyance unit configured to convey a printing medium in a conveyance direction; and a printing head configured to eject a liquid, and being capable of conducting a maintenance control on the printing head while temporarily pausing a printing operation and configured to execute tiled printing of printing an image in which a plurality of printed products obtained by printing are assumed to be arranged adjacent to each other, while dividing the image into a plurality of pages including at least a first page and a second page, wherein the printing apparatus is configured to control whether or not to conduct the maintenance control based on a conveyance-direction distance from a top of the page along the conveyance direction for the page during printing in a case of executing the tiled printing and printing each of the plurality of pages.

Abstract: A printing apparatus performs control so that out of N scans for printing an image in a predetermined region on a print medium, a total application amount of a reactive liquid printed by first N/2 scans and a total application amount of the reactive liquid printed by second N/2 scans may be different between a case where an application amount of the reactive liquid per unit area which corresponds to the predetermined region is a first amount and a case where the application amount of the reactive liquid per unit area is a second amount larger than the first amount.

Abstract: Provided is an inkjet printing apparatus, an inkjet printing method, and a storage medium capable of causing less density unevenness. To this end, in a case where an expected pause time is larger than a predetermined threshold T (s), a platen air blowing unit blows air to the surface of a printing medium on a platen at a wind speed lower than that during printing.

Abstract: A printing apparatus includes a printing unit to apply ink containing a coloring material, and a reactive liquid that reacts with the ink, to a printing medium, a reading unit to read an ink image on the printing medium, and a printing control unit to cause the printing unit to print a plurality of ink images different in application amount of the reactive liquid on the printing medium. In addition, a determination unit determines an application amount of the reactive liquid in printing using a predetermined type of printing medium, based on a ratio of a plurality of reading results obtained by the reading unit by reading the plurality of ink images printed on the predetermined type of printing medium.

Abstract: A technique capable of obtaining the displacement amount of the ejection position of a reaction liquid without changing a test pattern according to the configuration of the ejection head is to be provided. A test pattern including a detection pattern, which extends in a predetermined direction and in which, if divided into two, at least two inks and the reaction liquid are ejected to one area and only the at least two inks or the at least two inks and the reaction liquid of an amount that is smaller than that of the reaction liquid ejected to the one area are ejected to the other area, is printed, and the optical characteristics of the printed detection pattern are obtained. Further, based on the obtained optical characteristics of the detection pattern, the displacement amount of the ejection position of the reaction liquid in the predetermined direction is obtained.

Abstract: An image processing apparatus includes an acquisition unit that acquires N-valued image data corresponding to an image including at least one object, and edge data indicating an edge area of the object, an image processing unit that generates M-valued (N>M?2) quantized data where each of a plurality of pixels is associated with one of a value indicating that no dot is to be recorded and a value indicating that a dot is to be recorded, based on the acquired image data, using an image processing parameter, and a changing unit that changes at least one pixel among pixels that indicate the edge area of the object in the edge data and have the value indicating that no dot is to be recorded in the quantized data so that the at least one pixel has the value indicating that the dot is to be recorded.

Abstract: An inkjet printing apparatus includes a printhead in which a plurality of ejection ports that eject ink are formed, a carriage mounted with the printhead and reciprocated in a predetermined direction, a conveyance unit to convey a print medium, a platen to support, at a printing position, the conveyed print medium, and an obtaining unit to obtain information regarding a distance from an ejection port surface of the printhead to the print medium at positions in the predetermined direction. The apparatus controls an ink ejection timing in accordance with the information regarding the obtained distance and information corresponding to the number of passes of printing, which is the number of times of moving the carriage to print the image in a unit area of the print medium.

Abstract: A plurality of test patterns are printed with different print conditions, the test patterns each being formed by two inks out of a plurality of inks and a reaction liquid and including a plurality of patterns among which ejection positions of the reaction liquid relative to ejection positions of the two inks are displaced by a predetermined amount at a time. The optical properties of the respective test patterns printed on the print medium are detected. A displacement amount of the relative ejection positions of the reaction liquid from the ejection positions of the plurality of inks is obtained based on the optical property of the test pattern in which an optical density difference between the patterns in the test pattern is greater than a predetermined value and which has an optical density of a lowest level among the optical properties of the test patterns detected.

Abstract: Disclosed is an image processing apparatus including: a derivation unit configured to derive a target luminance characteristic based on a viewing condition of an image and a print luminance characteristic predicted based a reflection characteristic corresponding to data thereon; a unit configured to generate print image data on an image by converting input image data by using a tone conversion characteristic that is set based on these characteristics, in which the derivation unit derives, in a case where a reproduction range of an illumination intensity in the print luminance characteristic is different, the target luminance characteristic so that a liner area of an output luminance in a case where the reproduction range is relatively large becomes large.

Abstract: Luminance data indicating luminance of the print product illuminated by the lighting is calculated and processing for causing a high luminance region to have gradation characteristics is performed.

Abstract: A printing apparatus performs control so that out of N scans for printing an image in a predetermined region on a print medium, a total application amount of a reactive liquid printed by first N/2 scans and a total application amount of the reactive liquid printed by second N/2 scans may be different between a case where an application amount of the reactive liquid per unit area which corresponds to the predetermined region is a first amount and a case where the application amount of the reactive liquid per unit area is a second amount larger than the first amount.

Abstract: A printing apparatus includes a printing unit configured to apply ink containing a coloring material, and a reactive liquid that reacts with the ink, to a printing medium, a reading unit configured to read an ink image on the printing medium, a printing control unit configured to cause the printing unit to print a plurality of ink images different in application amount of the reactive liquid on the printing medium, and a determination unit configured to determine an application amount of the reactive liquid in printing using a predetermined type of printing medium, based on a correlation between a plurality of reading results obtained by the reading unit by reading the plurality of ink images printed on the predetermined type of printing medium.

Abstract: A print position adjustment mode is performed with high accuracy while consumption of print media is saved. An inkjet printing apparatus prints an adjustment pattern including multiple patches for adjusting print positions of dots by a print head on a print medium. Patches set next to each other in a scanning direction are printed above platen ribs at intervals based on rib pitches at which the platen ribs are arranged.

Abstract: A technique capable of obtaining the displacement amount of the ejection position of a reaction liquid without changing a test pattern according to the configuration of the ejection head is to be provided. A test pattern including a detection pattern, which extends in a predetermined direction and in which, if divided into two, at least two inks and the reaction liquid are ejected to one area and only the at least two inks or the at least two inks and the reaction liquid of an amount that is smaller than that of the reaction liquid ejected to the one area are ejected to the other area, is printed, and the optical characteristics of the printed detection pattern are obtained. Further, based on the obtained optical characteristics of the detection pattern, the displacement amount of the ejection position of the reaction liquid in the predetermined direction is obtained.

Abstract: A plurality of test patterns are printed with different print conditions, the test patterns each being formed by two inks out of a plurality of inks and a reaction liquid and including a plurality of patterns among which ejection positions of the reaction liquid relative to ejection positions of the two inks are displaced by a predetermined amount at a time. The optical properties of the respective test patterns printed on the print medium are detected. A displacement amount of the relative ejection positions of the reaction liquid from the ejection positions of the plurality of inks is obtained based on the optical property of the test pattern in which an optical density difference between the patterns in the test pattern is greater than a predetermined value and which has an optical density of a lowest level among the optical properties of the test patterns detected.

Abstract: A printing apparatus provides a conveyance operation in which a conveyance unit conveys a print medium in a conveyance direction, and includes a control unit to control a printing unit such that, in a case where an image is to be printed onto a print medium of a first type in a first state in which the print medium of the first type is supported by a first conveyance member and not supported by a second conveyance member, the printing unit uses a printing element included in a first region from which a distance to the print medium of the first type in a height direction perpendicular to a surface where the printing elements are arrayed is a first distance, and does not use a printing element included in a second region from which a distance to the print medium of the first type in the height direction is a second distance greater than the first distance.

Abstract: According to an aspect of the embodiments, in multi-tonal image data in which each of pixels is represented by bit data of M bits (M?2), reduction processing is performed by applying a mask pattern to the bit data to be thinned out without increasing load of calculation processing.