A color correction device includes: a color conversion unit configured to convert an input value in an input color space into an output value in an output color space; a selection unit configured to receive a selection, as a target color component, of one or more color components among a plurality of color components used in a printing device; and a correction unit configured to correct the output value in a manner of reducing the target color component when the input value represents a color not including the target color component.

An image processing apparatus acquiring image data whose color information is defined by N-bit signal values; acquiring data range information; quantizing the signal values for each of the color components in the acquired image data into M-bit signal values (N>M) based on the data range information; and a transmitting unit configured to transmit the quantized image data, wherein the quantizing is performed so that the maximum value of the signal values for each of the color components in the acquired image data becomes a maximum possible value in the range of the M bits, and the minimum value of the signal values for each of the color components in the acquired image data becomes a minimum possible value in the range of the M bits.

A printing apparatus has a plurality of nozzles including preceding nozzles that discharge ink onto a printing medium before ink discharge of the other nozzles, and succeeding nozzles that discharge ink onto the printing medium after the ink discharge of the preceding nozzles, and if the amount of black ink discharged on the printing target region is larger than a predetermined amount, the printing apparatus discharges a smaller amount of chromatic ink than the amount of the discharged black ink onto the printing target region from the plurality of nozzles so that the amount of the chromatic ink discharged from the succeeding nozzles is larger than the amount of the chromatic ink discharged from the preceding nozzles.

An image forming apparatus includes a drawing data creating unit and a controller. The drawing data creating unit creates drawing data from a print job. The controller automatically sets at least one of a first dropping method of performing discharge in a drawing area and a second dropping method of performing the discharge outside the drawing area as a preliminary discharge method in accordance with a type of component elements of the created drawing data, and performs preliminary discharge in accordance with the set preliminary discharge method.

An image processing method comprising: converting an RGB input signal to a CMYK signal; converting the RGB input signal to a common color signal including lightness; generating a first Gray signal including a Gray value substituted for CMY values forming gray in the CMYK signal; generating a second Gray signal including a Gray value corresponding to a K value greater than a threshold in the CMYK signal; generating a Gray output signal in a CMYKGray output signal indicating color material amounts of cyan (C), magenta (M), yellow (Y), black (K), and gray (Gray) for printing by multiplying the generated first Gray signal and the generated second Gray signal respectively by coefficients corresponding to the lightness in the common color signal and then synthesizing the first Gray signal and the second Gray signal.

An image capturing unit includes a sensor unit that image-captures a predetermined area including a subject; and a reference chart unit that is arranged in the predetermined area and captured with the subject by the sensor unit.

In one example, a first subset of a plurality of pixels in a halftone is determined to be associated with a first colorant. A second subset of the plurality of pixels in the halftone is determined to be associated with a second colorant, the second colorant being different from the first colorant. Pixel data associating a pixel in the plurality of pixels in the halftone with the first colorant and not the second colorant is generated when the pixel is included in the first subset and the second subset. Pixel data associating the pixel in the plurality of pixels in the halftone with the second colorant and not the first colorant is generated when the pixel is included in the second subset and not the first subset.

A calculating unit calculates, as a reference number N of scans, a sum by adding 1 to a product M of the number m of scans in a main-scanning direction and the number n of scans in a sub-scanning direction. An assigning unit assigns, as a count of scans indicating a scan order, an integer 1 or more and the product M or more to each pixel of a unit image. A changing unit changes the count of scans of some pixels to which a first scan is assigned to an N-th scan. The generating unit generates print data, in which nozzle groups from a nozzle group arranged on a downstream end in the sub-scanning direction to a nozzle group arranged on an upstream end are sequentially assigned to pixels from the pixels to which the first scan is assigned to the pixels to which the N-th scan is assigned.

An inkjet printer system that records images in a shorter time while taking ink drying time into account includes an output data generator including an ink information acquirer, a hard-to-dry index acquirer, a first image setter, a first area setter, and a layout arranger. The ink information acquirer acquires, for two or more images, ink information including an amount of ink required to record the images. The hard-to-dry index acquirer acquires, for each of the two or more images, a hard-to-dry index calculated from the ink information and indicating how difficult the ink is to dry. The first image setter sets an image having a highest hard-to-dry index to be a first image. The first area setter sets a first area in a recording area of a recording medium that is upstream in a conveying direction. The layout arranger arranges the first image in the first area earlier than other images.

With respect to a configuration for performing printing in an inkjet method, the disclosure implements a more appropriate configuration in which it is difficult for the quantity of printing to deteriorate. This configuration includes a head unit (12), a main scan driver (14), and a controller (20). When main scan operations are performed, the controller (20) performs control with respect to the same area on the medium (50) such that the head unit (12) ejects ink drops of one selected color onto a plurality of first selection pixels selected on the basis of a first mask data item and a plurality of second selection pixels selected on the basis of a second mask data item different from the first mask data item in the arrangement of a plurality of pixels to be selected.