Abstract: An image processing device converts input image data to converted image data and produces scaled image data based on the converted image data. Each set of converted pixel data in the converted image data includes an achromatic color value and a plurality of chromatic color values. The achromatic color value indicates an amount of an achromatic color material. Each of the plurality of chromatic color values indicates an amount of one of a plurality of chromatic color materials. An achromatic color is produced by mixing at least one of the achromatic color material and the plurality of chromatic color materials. Each set of scaled pixel data in the scaled image data corresponds to at least one set of converted pixel data. The image processing device produces each set of scaled pixel data based on the corresponding at least one set of converted pixel data.

Abstract: A print execution unit may convey a sheet in a second direction intersecting with a first direction, in a state in which the sheet is deformed into a corrugated shape along the first direction. A print control apparatus may generate corrected image data from input image data by performing a correction process using correction data, and supply the corrected image data to the print execution unit. The correction process may be performed such that a density of first-type printed partial images printed in first-type areas on a sheet is different from a density of second-type printed partial images printed in second-type areas on an assumption that the input image data represents an image having constant tone values and the sheet is conveyed in a flat state without deformation. The first-type areas and the second-type areas extend along the second direction and are alternately arranged along the first direction.

Abstract: A recording head having a plurality of recording elements arranged at a prescribed pitch in a first direction. A scanning unit is configured to move the recording head back and forth in a second direction perpendicular to the first direction. A setting unit is configured to set process pixels in an input image by rendering at least one of the plurality of recording elements disabled so as not to form dots and at least another one of the plurality of recording elements enabled to allow dots to be formed in each of a plurality of columns of a recording medium. A dot data generating unit is configured to generate dot data by applying a weight matrix to the density data of the process pixel. The dot data is applied to the recording head to form dots on the recording medium.

Abstract: In a case where N1 lines (N1 being less than N which is a number of nozzles included in one nozzle line) of target line image data represent N1 lines of target line images to be printed by only one specific color of ink, and (N?N1) lines of remaining line image data include line image data which represents a line image to be printed by two or more colors of ink, the controlling device may select only the N1 lines of target line image data, so as to determine the opposite direction of the direction of the main scanning of a previous time as the direction of the main scanning of a present time.

Abstract: In a recording control system, the selecting unit selects at least one pixel from among the pixels in the detection region such that a number of the selected at least one pixel is smaller than a total number of the pixels in the detection region. The determining unit determines whether a pixel value of the selected pixel satisfies a criterion. The recording head ejects ink based on pixel data of the first region while scanning in the first direction. The recording head ejects ink based on pixel data of the second region adjacent to the first region while scanning in the first direction when the pixel value of the selected at least one pixel satisfies the criterion. The recording head ejects ink based on pixel data of the second region while scanning in the second direction when the pixel value of the selected pixel does not satisfy the criterion.

Abstract: An apparatus for processing an image, includes: a color information determination unit; and a correction amount setting unit. The color information determination unit classifies a plurality of pixels configuring an image into a plurality of groups according to a brightness thereof, and determines representative color information for each of the groups. The correction amount setting unit sets a correction amount for a white balance correction based on the representative color information determined for at least a part of the groups.

Abstract: In a recording control system, representative pixels are set as a part of the pixels in the detection region. The determining unit determines whether a pixel value of the selected at least one representative pixel falls within a first pixel value range. The recording head ejects ink based on pixel data in the first region while scanning in the first direction. The recording head ejects ink based on pixel data in the second region adjacent to the first region while scanning in the first direction when the pixel value of the selected at least one representative pixel falls within the first pixel value range. The recording head ejects ink based on pixel data in the second region while scanning in the second direction when the pixel value of at least one of the selected at least one representative pixel does not falls within the first pixel value range.

Abstract: A print data generating device includes an image orientation selecting portion and a print data generating portion. The image orientation selecting portion may select one image orientation of an image to be printed from several image orientations by using partial image data. The print data generating portion may generate print data for printing the image according to the one image orientation. Each image orientation may be with respect to a conveying direction. Each partial image data may correspond to a respective image orientation, a respective partial image, and a respective portion of the image to be printed. Each partial image may be printed in an area defined by a particular distance determined from a corresponding edge of the printing medium. The particular distance may be based on a distance between a location of a downstream roller and a location of a most-upstream nozzle for a printer in the conveying direction.

Abstract: A color gamut data creating device includes a target plane determining unit. The measurement points are defined in a color space. The color space has an achromatic axis and an axis perpendicular to the achromatic axis. The target plane determining unit further determines a plurality of target planes. Each target plane has a fixed hue angle and including the chromatic axis. A difference between a maximum saturation at a hue angle of each target plane and a maximum saturation at a hue angle of another target plane that is adjacent to the each target plane is lower than a prescribed value. The locating unit that projects, on each target plane, those measurement points that are within a prescribed range relative to the subject target plane. The color gamut creating unit creates color gamut data indicative of a distribution range of the measurement points projected on each target plane.

Abstract: A print control device includes a processor operating as a determining unit and a direction setting unit. The determining unit determines that a condition is satisfied for a boundary block when an index value of the boundary block indicates that an estimated amount is larger than a first value, and that the condition is satisfied for an internal block when an index value of the internal block indicates that the estimated amount is larger than a second value. The second value is larger than the first value. The direction setting unit sets, for each part data, a direction of main scanning to a specific direction when the part data includes the block that satisfies the condition. The direction setting unit sets the direction of main scanning to a direction opposite to a previously set direction when the part data does not include the block that satisfies the condition.

Abstract: An image processor includes a first data acquiring unit, a second data acquiring unit, a third data acquiring unit, a convergence point setting unit, and a converting unit. The first data acquiring unit acquires first color data that is included in a first color gamut. The second data acquiring unit acquires second color data having a highest chroma of a second color gamut. The second color gamut has a middle point on an achromatic axis. The third data acquiring unit acquires third color data that is located on the achromatic axis and that is closer to the middle point than a point on the achromatic axis having the same lightness of the second color data. The convergence point setting unit sets a convergence point for the first color data on a first line segment defined between the second color data and the third color data. The converting unit converts the first data into fourth data that is included in the second color gamut by moving the first data in a direction toward the convergence point.

Abstract: An image processor includes a color conversion unit that generates color converted image data by converting color data and an error diffusion process performing unit that generates print data by performing an error diffusion process on the color converted image data. The error diffusion process performs a first error diffusion process on remaining data and performing a second error diffusion process on edge data such that an amount of ink used in the edge region by performing the second error diffusion process on the edge data is less than an amount of ink used in the edge region by performing first error diffusion process on the edge data.

Abstract: In an image processing apparatus, the generating unit generates print data indicating whether a dot having one of a plurality of sizes is formed or not, by performing a halftone process on original image data. The correcting unit generates corrected print data by correcting the print data. The dividing unit divides the edge part data of the print data into a plurality of block data. The index value determining unit determines, for each block data, an index value relating to an amount of ink to be used based on the plurality of dot data included in the each block data. The changing unit changes, for each block data, the size information of at least one dot data among the plurality of dot data included in the each block data based on the index value such that the amount of ink to be used becomes reduced.

Abstract: The image processor processes each pixel of a halftone image by sequentially setting each pixel as a target pixel. A converting unit converts a pixel density of the target pixel into a first output value. An error data calculation unit calculates error data of the target pixel. The error data corresponds to a difference between the first output value and the pixel density. A compression unit irreversibly compresses the error data of the target pixel. Partial data of the pixel density is lost from the error data when irreversibly compressing the error data. An error buffer stores the compressed error data of the target pixel and a plurality of sets of compressed error data for a plurality of processed pixels. A decompression unit reads and decompresses a plurality of sets of compressed error data for a plurality of peripheral pixels with respect to a next target pixel from the error buffer.

Abstract: An image processing method corrects an original image. The method performs a retinex processing on a luminance signal of each pixel in an original image. The method determines, for each pixel, a retinex-processed pixel value based on the luminance signal that has been subjected to the retinex processing and at least one signal other than the luminance signal. The method generates a histogram by counting a rate of occurrence of the retinex-processed pixel values for each level over a predetermined first range of pixel values to which the retinex-processed pixel value is possibly assigned. The method reassigns each pixel value based on the histogram.

Abstract: A device for creating print data utilized by a printer is disclosed. The print data includes a coordinate at which a dot is to be formed on a print medium by the printer. The print data creating device is provided with a first device and a second device. The first device chooses a first coordinate from bit-mapped data. The bit-mapped data includes a plurality of combinations of the first coordinate and color information. The first device chooses the first coordinate based on the color information being combined with the first coordinate. The second device creates the print data by converting the first coordinate chosen by the first device into at least two second coordinates which are randomly chosen from at least three second coordinates located in the neighborhood of the first coordinate.

Abstract: A color data setting unit that sets a plurality of sets of fifth color data that are defined in a first color space in one to one correspondence with a plurality of fourth color data sets. An identifying unit identifies some of first reference points, that are in proximity to the fifth color data set for each of second reference points. A calculation unit calculates, for each of all the second reference points, color differences between the fifth color data set for the each second reference point and the some of the first reference points. A determining unit determines, for each of the first reference points, a single fifth color data set that has the smallest color difference among all the color differences that are calculated with respect to the each of the first reference points. A registering unit registers, at each of the first reference points, the fourth color data set that is set in correspondence with the single fifth color data sets.

Abstract: A color gamut data creating device includes a locating unit, and an extracting unit. The locating unit locates characteristic points based on the measurement points on a target plane. The extracting unit extracts at least three vertices of a color gamut from among the characteristic points. The at least three vertices satisfy the conditions that a first point, which is any one of the at least three vertices, is located within a reference distance from a second point adjacent to the first point from among the at least three vertices, and that all cross products that are calculated by a vector from the first point to the second point and vectors from the first point to any characteristic points that are located within the reference distance from the first point have the same sign.

Abstract: A color gamut data creating device includes a locating unit, and an extracting unit. The locating unit locates characteristic points based on the measurement points on a target plane. The extracting unit extracts at least three vertices of a color gamut from among the characteristic points. The at least three vertices satisfy the conditions that a first point, which is any one of the at least three vertices, is located within a reference distance from a second point adjacent to the first point from among the at least three vertices, and that all cross products that are calculated by a vector from the first point to the second point and vectors from the first point to any characteristic points that are located within the reference distance from the first point have the same sign.

Abstract: An image processing device may perform an analysis by utilizing target data representing a target image of a print target, so as to select, from among a plurality of types of print orders for printing the target image, one type of print order in which a print of the target image is presumed to be completed in the shortest time period. In each of the plurality of types of print orders, an area in the target image to be printed by the initial main scanning of the print head may be mutually different. The image processing device may create print data by utilizing the target data for causing a print performing unit to perform the print of the target image according to the selected one type of print order, and supply the print data to the print performing unit.