A white-plate graphic erosion process is performed on print data subjected to a RIP process in the following procedure. First, an erosion candidate region which is a candidate for a region in which a white-plate graphic is eroded is determined. Then, a region to be applied with an ink of a color other than white is determined. Then, an application target region is determined. Then, a region other than a region obtained by an erosion process out of the application target region is determined to be an erosion allowed region. Then, a region included in the colored region and the erosion allowed region out of the erosion candidate region is determined to be an erosion target region. Finally, the values of data of pixels included in the erosion target region among white-plate data are rewritten such that the amount of white ink applied to the pixels is reduced.

An image processing apparatus generates image data used in printing an image on a sheet being attachable to skin. The image processing apparatus includes: an image acquirer that acquires a skin image picked up from the skin; an image analyzer that extracts, from the skin image, a discolored region differing in color from surrounding skin by at least a predetermined level, and surrounding color being color of the skin surrounding the discolored region; a grouping processor that groups a plurality of the discolored regions, and determines an inclusive region for each region group which is a cluster of the grouped plurality of discolored regions or one discolored region not having been grouped, to include the one or a plurality of the region groups; and a printing controller that generates image data having a content of printing a pigment material that causes color of the inclusive region to approximate the surrounding color, on a region corresponding to the inclusive region in the sheet.

An image forming system capable of preserving appropriate density-gradation characteristics and color output characteristics. An image processing apparatus for executing second calibration is connected to an image forming apparatus for executing first calibration. When an instruction for executing the second calibration in succession to execution of the first calibration is received, the image processing apparatus transmits an inhibition command for inhibiting a print operation to the image forming apparatus, and shifts to an inhibition mode. The image processing apparatus transmits a cancel command for canceling inhibition of the print operation to the image forming apparatus. Even when an instruction for executing the job is received, the image processing apparatus does not transmit the job to the image forming apparatus during the inhibition mode.

A color processing device includes a color-data acquisition section, a conversion-relationship generation section, a correction-image-data generation section, and a conversion-relationship correction section. The color-data acquisition section acquires color data of a first image output by a first image forming device. In accordance with a first relationship and a second relationship, the conversion-relationship generation section generates a conversion relationship used for color adjustment performed to match a color of a second image to be output by a second image forming device on a basis of unadjusted image data with a color of the first image. The correction-image-data generation section generates, on a basis of the unadjusted image data, correction image data for correcting the conversion relationship. The conversion-relationship correction section performs correction of the conversion relationship on a basis of color data of correction images output by the second image forming device by using the correction image data.

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.

An image processing apparatus including a contour extraction section which extracts a contour pixel of an object from pixels in image data that has tone values of a plurality of colors for each of the pixels; and a contour processing section which executes thinning processing of adjusting a tone value of an object color of the object and trapping processing of adjusting a tone value of a background color among tone values of colors in the contour pixel of the object which is extracted by the contour extraction section or in a contour pixel of the background of the object, wherein the contour processing section links an adjustment amount of the tone value of the background color by the trapping processing to an adjustment amount of the tone value of the object color by the thinning processing.

An image processing device supplies image data to be used in an image forming apparatus, the image processing device including a control unit configured to process the image data in accordance with an image quality processing parameter, wherein the control unit distinguishes between an overprint region in which overprinting of a coat layer of a transparent material is to be performed on a transfer medium and a non-overprint region in which the overprinting is not to be performed, and adjusts a difference in image quality between the overprint region and the non-overprint region by using the image quality processing parameter.

Provided is a print control apparatus that dispenses ink of a plurality of colors through corresponding nozzles according to print data, to print an image on a printing medium. The print control apparatus includes a print data generation unit that generates, according to the image, the print data defining on/off setting of dots in each of pixels with respect to the ink of each of the plurality of colors. The print data generation unit generates the print data for the ink of a specific color having highest brightness among the plurality of colors through first gray scale conversion using a dither mask, and generates the print data for the ink of the plurality of colors except for the color subjected to the first gray scale conversion, through second gray scale conversion using a line screen.

An electronic image in a first color space, used by image acquisition devices, is obtained and converted into a second color space with a larger gamut, to produce a second color space image. Corrections are made to the second color space image to produce a corrected image, without performing background suppression. The corrected image is converted into a third color space, used by printing devices, to produce a third color space image, and this process of converting the corrected image into the third color space includes performing background suppression. This process of converting the corrected image into the third color space samples nodes of the second color space values, classifies the nodes as background nodes or non-background nodes, multiplies the second color space values of the background nodes by a percentage less than 100%, and after multiplying, interpolates values between the nodes.

An image forming method comprising includes: receiving print data; detecting whether the received print data includes specific encoded data where a luminance component is encoded separately from chrominance components; generating monochrome data by decoding the luminance component without decoding the chrominance components if the specific encoded data is detected and execution of the monochrome printing is determined; and executing monochrome printing based on the monochrome data.