A printing control apparatus, which controls printing of a printing area including an overlapping area on which printing is performed through a plurality of scanning operations, includes a printing data generation section that generates sets of printing data each associated with a corresponding one of the plurality of scanning operations in the overlapping area on the basis of an image data targeted for printing. The printing data generation section performs correction in accordance with a color density of the overlapping area in the image data.

A printer includes a print engine and a controller configured to, when a particular condition is satisfied, control the print engine to perform first partial printing to form first dots corresponding to a first portion of a target image without forming second dots corresponding to a second portion of the target image, perform sub scanning over a first distance after the first partial printing and before second partial printing, and perform the second partial printing to form the second dots without forming the first dots, and when the particular condition is not satisfied, control the print engine to perform the first partial printing to form at least a part of the first dots, perform the sub scanning over a second distance different from the first distance after the first partial printing and before second partial printing, and perform the second partial printing to form the second dots.

A control unit causes a carriage to move in a width direction under a first movement control of changing a location of the carriage with a first resolution so that a sensor located forward in movement detects an edge of a medium. Thereafter, the first movement control is switched to a second movement control of changing the location of the carriage with a second resolution higher than the first resolution and the carriage is caused to move in the width direction so that a sensor located rearward in movement detects the edge.

MTF characteristics of a concavo-convex forming apparatus change depending on the amount of amplitude of input data, the operation condition of the apparatus, etc., and therefore, it is not possible to form a concavo-convex shape with good characteristics only by applying the MTF correction technique widely known in the image processing field. A concavo-convex forming apparatus including an input unit configured to input concavo-convex data representing concavo-convex of an object to be printed, and a correction unit configured to perform correction in accordance with a plurality of frequency band of the input concavo-convex data and whose intensity is made higher for the larger amplitude on the input concavo-convex data based on frequency response characteristics in a case where concavo-convex is formed on a printing medium.

A liquid jetting apparatus includes a casing, a tank formed with a liquid storage chamber which stores liquid, an inlet which allows the liquid to be poured into the liquid storage chamber, and a liquid outflow channel which allows the liquid to flow out from the liquid storage chamber, a conveying mechanism which conveys a recording medium along a conveying path extending in a front-rear direction, a carriage which moves in a left-right direction, and a head mounted on the carriage and having a nozzle which jets the liquid onto the recording medium conveyed by the conveying mechanism. The tank, the conveying path, and the carriage are arranged inside the casing, the tank is arranged outside the conveying path in the left-right direction, and at least a part of the tank is arranged inside both ends of a movement area of the carriage in the left-right direction.

A controller of an inkjet printer: calculates second density correction values for respective nozzles arranged in a predetermined direction to print a second line of an image data, by using gray-level values of pixels in the second line of the image data corresponding to the respective nozzles and first density correction values for the respective nozzles to print a first line of the image data printed immediately prior to the second line; and corrects the gray-level values of the pixels in the second line of the image data corresponding to the respective nozzles, by using the calculated second density correction values.

An object is to print a high quality image with resistance to print misalignment. To this end, the image processing apparatus generates quantized data for printing a first dot pattern and a second dot pattern in an overlapping manner. The first dot pattern and the second dot pattern are lattice patterns varying in a combination of two basis vectors. In a combined dot pattern obtained by combining the first and second dot patterns, there is a neighboring dot in which a dot in the first dot pattern and a dot in the second dot pattern are arranged at an interval smaller than a lattice spacing. The neighboring dot includes multiple neighboring dots varying in an approach direction.

In S200 after the first halftone, a scanning path is determined. In S205, a printing region to undergo multipass printing is fragmented. In S210, a printing time gap between the first printing time and the second printing time is calculated in the printing position. In S215, the position of the scanning path is associated with information on a color conversion table corresponding to the time gap. In the subsequent second color conversion, the color conversion table for use in color conversion is switched to the color conversion table corresponding to the time gap by using information on the pre-specified position of the scanning path and information on the color conversion table.

In color separation processing by a method that combines a multidimensional LUT and interpolation processing, smooth gradation is implemented by reducing errors accompanying interpolation processing. An image processing apparatus includes a color separation processing unit configured to perform, by interpolation processing using a lookup table having a plurality of dimensions in accordance with signal components of an input image, color separation of an input value that is each pixel value of the input image into an output value corresponding to each of signal components handled by an output device, and each grid point of the lookup table is associated with information representing change characteristics at each portion between adjacent grid points for each dimension of the plurality of dimensions, and in the color separation processing, the interpolation processing is performed based on the information representing the change characteristics.

According to one embodiment, a tablet printing apparatus includes: a conveyer configured to convey a tablet along a line; an applicator head including a plurality of nozzles arranged in a direction crossing the conveyance direction of the tablet conveyed by the conveyer, configured to perform printing on the tablet by ejecting a liquid from the nozzles; and a controller configured to control the ejection of the liquid from the nozzles of the applicator head. The length of an array of the nozzles in a direction perpendicular to the conveyance direction is equal to or longer than the length of the tablet in the direction perpendicular to the conveyance direction. The controller is further configured to control switching of a nozzle used for printing on the tablet among the nozzles by a plurality of sections determined in advance.