Abstract: An image forming apparatus includes a recording head, a controller, and a correction processor. The controller determines a nozzle corresponding to an image to be printed, and causes the recording head to eject ink from the nozzle. The correction processor detects an abnormally ejecting nozzle out of the nozzles in the recording head, and designates the abnormally ejecting nozzle as a target nozzle, and performs correction processing based on a status of the target nozzle, to the image. The correction processor also adds the detected abnormally ejecting nozzle to history data, each time a detecting operation is performed, and selects a nozzle included in the history data as an additional target nozzle, out of the nozzles that have not been detected as the abnormally ejecting nozzle, through the current detecting operation, and adds the selected nozzle to the target nozzle.

Abstract: An abnormal ejection detection portion detects an abnormal ejection nozzle in a print head based on a read test image read from a sheet with a test pattern formed thereon. When a plurality of abnormal ejection nozzles are detected and the plurality of abnormal ejection nozzles include two consecutive abnormal nozzles corresponding to two consecutive pixels in the read test image, a correction processing portion performs increase correction on an ink ejection amount of consecutive adjacent nozzles adjacent to the two consecutive abnormal nozzles and performs decrease correction on an ink ejection amount of secondary adjacent nozzles adjacent to the consecutive adjacent nozzles.

Abstract: An ink-ejection-malfunction-nozzle detecting unit sets nozzle groups such that each nozzle group includes nozzles with a first interval, prints a first test pattern that includes first bands (including thin lines) corresponding to the nozzle groups, sets nozzle subgroups such that each nozzle subgroup includes nozzles with a second interval in each of the nozzle groups, prints a second test pattern that includes second bands (including thin blank lines) corresponding to the nozzle subgroups such that a correction process is performed for adjacent pixels of the thin blank lines, detects a first band including density defect in a scanned image of the first test pattern, detects a second band not including density defect in a scanned image of the second test pattern, correspondingly to the detected first band, and detects an ink ejection malfunction nozzle on the basis of the thin blank line in the detected second band.

Abstract: A method of treating systemic sclerosis in a patient administers an IL-23 specific antibody, e.g., guselkumab, at an initial dose and subsequent doses in order for the patient to respond to the antibody and meet one or more of the clinical endpoints.

Abstract: In an image forming apparatus, a correction processing unit prints a test pattern using a recording head, determines ink ejection malfunction positions on the basis of a scanned image of the test pattern, sets one of first and second correction modes for each of the ink ejection malfunction positions in accordance with a density of the ink ejection malfunction position on the basis of the scanned image, and performs the correction process for the ink ejection malfunction position in the set first or second correction mode. In the first correction mode, the correction process is performed for both a nozzle corresponding to the ink ejection malfunction position and an adjacent nozzle of the nozzle. In the second correction mode, the correction process is not performed for the nozzle corresponding to the ink ejection malfunction position but is performed for the adjacent nozzle.

Abstract: An image processing apparatus includes a halftone processing unit and a multi-level gradation processing unit. The halftone processing unit is configured to perform a halftone process for a target image and generate a binary image corresponding to the target image. The multi-level gradation processing unit is configured to (a) set a target pixel as a dot pixel in the binary image, (b) determine whether a dot exists on plural first periphery pixels with a predetermined first distance from the target pixel and plural second periphery pixels with a predetermined second distance from the target pixel or not, (c) derive a gradation level of the target pixel among predetermined three or more gradation levels on the basis of a number of dots on the plural first periphery pixels and a number of dots on the plural second periphery pixels and thereby generate a multi-level gradation image.

Abstract: An image processing apparatus includes a halftone processing unit and a multi-level gradation processing unit. The halftone processing unit is configured to perform a halftone process for a target image and generate a binary image corresponding to the target image. The multi-level gradation processing unit is configured to (a) set a target pixel as a dot pixel in the binary image, (b) determine whether a dot exists on plural first periphery pixels with a predetermined first distance from the target pixel and plural second periphery pixels with a predetermined second distance from the target pixel or not, (c) derive a gradation level of the target pixel among predetermined three or more gradation levels on the basis of a number of dots on the plural first periphery pixels and a number of dots on the plural second periphery pixels and thereby generate a multi-level gradation image.

Abstract: An inkjet recording apparatus includes a sheet conveying unit, a storage unit, a line head, and a control unit. The line head includes an upstream-side head and a downstream-side head. The upstream-side and downstream-side heads are fitted to have overlapping portions in which a plurality of nozzles arranged in respective end portions of the heads overlap as seen from the sub scanning direction. When an adjustment chart is printed, the control unit makes the nozzles in the overlapping portion of the upstream-side head print a first line. The control unit makes the nozzles in the overlapping portion of the downstream-side head print a second line.

Abstract: An inkjet recording apparatus includes a sheet conveying unit, a storage unit, a line head, and a control unit. The line head includes an upstream-side head and a downstream-side head. The upstream-side and downstream-side heads are fitted to have overlapping portions in which a plurality of nozzles arranged in respective end portions of the heads overlap as seen from the sub scanning direction. When an adjustment chart is printed, the control unit makes the nozzles in the overlapping portion of the upstream-side head print a first line. The control unit makes the nozzles in the overlapping portion of the downstream-side head print a second line.

Abstract: A replacement assisting liquid having a lower specific weight than an ink is introduced into a recording head filled with a preservative solution containing at least a moisturizing agent to discharge the preservative solution out of the recording head. Next, the ink is introduced into the recording head to discharge the replacement assisting liquid out of the recording head.

Abstract: A replacement assisting liquid having a lower specific weight than an ink is introduced into a recording head filled with a preservative solution containing at least a moisturizing agent to discharge the preservative solution out of the recording head. Next, the ink is introduced into the recording head to discharge the replacement assisting liquid out of the recording head.