Provided is an ink jet recording method in which an image is formed by applying an ink containing a coloring material and a processing liquid containing a flocculant to a surface of a recording medium by a droplet discharge device to coalescence, wherein an application amount of the processing liquid is changed in accordance with an application amount of the ink for each unit area, and is controlled to be 5 g/m.sup.2 or less in all of the unit areas in which the images are formed, and when the image is formed in a plurality of printing passes, an average value of the application amounts of the processing liquid in each printing pass in the unit areas in which the application amount of the processing liquid is 0.8 g/m.sup.2 or more is controlled so that a deviation when compared between the printing passes is within ±30%.

An apparatus corrects a measurement value obtained by measuring a first image formed using a recording element that ejects ink, to identify a density characteristic of the recording element. The apparatus includes a first acquisition unit configured to acquire a second image obtained by measuring the first image, an identification unit configured to identify a boundary between regions in the second image, each of the regions corresponding to one of a plurality of head modules including the recording element, and a first correction unit configured to correct a measurement value of the second image based on the identified boundary.

A control unit configured to perform multi-pass printing provided that a region of a printing medium including a first region, a region downstream of the first region is a second region, and a region downstream of the second region is a third region, in a first period in which the first region is a target of printing, causes a velocity of paper feed to be slower than in a third period in which the third region is a target of printing; in the first period, causes a standby time of the printing head to be longer than in the third period; and in a second period in which the second region is a target of printing, changes the standby time so that the standby time approaches the standby time in the first period from the standby time in the third period as the first region approaches the printing head.

A print processing portion causes a print device to execute printing of a print image based on print data in accordance with a first scanning amount detected when manual scanning is performed at a first time. A density complementation processing portion causes the print processing portion to execute reprinting in accordance with a second scanning amount detected when the manual scanning is performed at at least a second time. When the manual scanning is performed at at least the second time, the density complementation processing portion identifies density insufficient parts in the print image printed by the print device based on the scanning amount and an image read by an optical reading device. Furthermore, the density complementation processing portion causes the print processing portion to execute the reprinting for the density insufficient parts.

An information processing apparatus, an information processing method, and a storage medium that execute density characteristics acquisition processing at an appropriate timing are provided.

A method of controlling a printer is described, for printing a pattern from a first row of fluid ejection nozzles and a second row of fluid ejection nozzles in a multi-pass printing mode. The first and second rows of fluid ejection nozzles eject fluid of a first type and fluid of a second type, respectively. The method comprises: assigning respective parts of the pattern to be printed to the first and second rows of fluid ejection nozzles; applying a first mask to the first row of said ejection nozzles and a second mask to the second row of fluid ejection nozzles for printing with selected nozzles of each of the rows of fluid ejection nozzles during each pass; wherein the first mask comprises a mesa portion and the second mask comprises a mesa portion wherein the mesa portion of the first mask includes at least a first peak and the mesa portion of the second mask includes at least a second valley, the first peak overlapping with the second valley.

Examples include estimation of pen to paper spacing (PPS). Examples include an alignment pattern printed on a medium at a target speed, an optical scan procedure performed on the printed alignment pattern to determine values of cross-media misalignment for first and second portions of the alignment pattern, determination of a dynamic swath height error (DSHE) effect value based on the values of cross-media misalignment, and estimation of an amount of PPS based on the determined DSHE effect value and the target print speed.

A liquid discharge apparatus includes a head and circuitry. The head discharges liquid to apply the liquid to an application surface. The circuitry controls discharge of the liquid from the head based on a vertical height of an application position at which the liquid is applied on the application surface.

A liquid discharge apparatus to discharge liquid to apply the liquid to an object includes a head, a mover, a rotator, and processing circuitry. The head has a nozzle surface in which a plurality of nozzle rows each including a plurality of nozzles to discharge the liquid are arranged. The mover relatively moves the head and the object in each of a first direction and a second direction orthogonal to each other along the nozzle surface. The rotator rotates the head along the nozzle surface. The processing circuitry controls the relative movement to correct unevenness of a nozzle interval between the plurality of nozzles along the second direction caused by an inclination between the first direction and a third direction when the head is rotated. The third direction is a direction in which the plurality of nozzles are arranged in each of the plurality of nozzle rows.

A printing device comprising a printing head including a plurality of nozzles configured to discharge ink to a printing medium are arranged, and a control unit configured to control discharge of the ink. The printing head is configured to discharge the ink along with scanning that is a relative movement in a predetermined direction with respect to the printing medium, and in test printing for printing a TP on the printing medium, the control unit performs control such that the ink of a first discharge amount is discharged from the nozzles when a color difference between the TP and the printing medium is greater than a predetermined threshold value, and the ink of a second discharge amount that is greater than the first discharge amount is discharged when the color difference between the TP and the printing medium is equal to or smaller than the threshold value.