Abstract: An image processing apparatus converts a first combination including color signals respectively corresponding to first ink, second ink, and third ink, which are input to be recorded in a first area on a recording medium into a second combination including color signals respectively corresponding to the first ink, the second ink, and the third ink, and converts a third combination including color signals respective corresponding to the first ink, the second ink, and the third ink which are input to be recorded in a second area on the recording medium into a fourth combination including color signals respectively corresponding to the first ink, the second ink, and the third ink, wherein a difference between a color of a first image and a color of a second image is reduced and a difference between a frequency of the first image and a frequency of the second image is reduced.

Abstract: The present invention provides an image processing device that reproduces the color of an input image more faithfully under different environment illumination without the need to prepare a different signal separation LUT for different environment illumination. An image processing device in one embodiment of the present invention generates data for generating an overlap image by overlapping an image formed by an image forming device and an image projected by an image projection device. The image processing device includes a generation unit configured to, based on input image data, generate first image data for the image forming device and second image data for the image projection device, a first acquisition unit configured to acquire environment illumination information relating to environment illumination in generating the overlap image, and a correction unit configured to correct the second image data based on the environment illumination information.

Abstract: First to third inks have a relationship where dot power of an overlapping dot formed by overlapping dots of first and third inks is higher than dot power of an overlapping dot formed by overlapping dots of second and third inks. A first gradation value for the first ink is quantized to generate a first quantized value, a second gradation value for the second ink is quantized to generate a second quantized value, and a third gradation value for the third ink is quantized to generate a third quantized value. In this case, the quantization processing is performed such that, among pixels for which the third quantized values indicate printing in a predetermined pixel region, the number of pixels for which the second quantized values indicate printing is greater than the number of pixels for which the first quantized values indicate printing.

Abstract: A surface tension difference between a first ink and a third ink is smaller than a surface tension difference between the first ink and a second ink. A first gradation value for the first ink is quantized to generate a first quantized value, a second gradation value for the second ink is quantized to generate a second quantized value, and a third gradation value for the third ink is quantized to generate a third quantized value. The above quantization processing is performed such that, in a predetermined pixel region, the number of pixels for each of which the second quantized value and the third quantized value both indicate printing is greater than the number of pixels for each of which the first quantized value and the third quantized value both indicate printing.

Abstract: An image is printed by using a first, second and third ink. A surface tension difference between a first ink and a third ink is smaller than a surface tension difference between the first ink and a second ink. A first gradation value for the first ink, a second gradation value for the second ink and a third gradation value for the third ink are quantized to generate a first quantized value, a second quantized value, and a third quantized value respectively. This quantization processing is performed such that, the number of pixels for each of which the first quantized value indicates printing, a the second quantized value indicates non-printing and the third quantized value indicates non-printing is greater than the number of pixels for each of which the first quantized value indicates printing and at least the second quantized value indicates printing or the third quantized value indicates printing.

Abstract: When a sum of a first gradation data for a first color and a second gradation data for a second color is greater than the maximum value of thresholds of a first threshold matrix, a generation unit generates a first overlapping gradation data and second overlapping gradation data by dividing a value obtained by subtracting the maximum value from the sum. Further, the generation unit generates a first quantization data based on a result of comparing the first overlapping gradation data with the second threshold or a result of comparing a difference between the first gradation data and the first overlapping gradation data with the first threshold, and generates a second quantization data based on a result of comparing the second overlapping gradation data with the first threshold or a result of comparing a difference between the second gradation data and the second overlapping gradation data with the second threshold.

Abstract: An image processing apparatus performs image processing to print a color materials of a first color and a second color. When a sum of a first gradation data for the first color and a second gradation data for the second color is equal to or smaller than the maximum value of thresholds of a first threshold matrix, a generation unit generates a second quantization data for the second color based on a result of comparing the second gradation data with a second threshold. When the sum is greater than the maximum value, the generation unit generates third gradation data by subtracting the maximum value from the sum and generates the second quantization data based on a result of comparing the third gradation data with the first threshold or a result of comparing a difference between the second gradation data and the third gradation data with the second threshold.

Abstract: An apparatus comprises supply means for changing an amount of light sinusoidally and supplying to a projection means a patterned light signal for sequentially projecting on an object to be measured at least three patterns of patterned light having phase differences; obtainment means for obtaining image data acquired by capturing the object; first generation means for generating a phase image from image data acquired by capturing the object on which the patterned light is sequentially projected; second generation means for generating, based on the phase image, a shape image which indicates a distance between a surface of the object and a viewpoint in the capturing; and correction means for calculating an amount of correction for the shape image from a correspondence between a pixel value of a high-frequency shape image indicating a high-frequency component of the shape image and a pixel value of the phase image.

Abstract: An object of the present disclosure is to reduce density unevenness and streaks of an image that is printed in a case where it is not possible to implement sufficient correction only by the correction for a defective nozzle. One embodiment of the present invention is an image processing apparatus that performs processing for an input image for an image forming apparatus performing printing on a printing medium by using a print head in which a plurality of printing elements is arrayed, the image processing apparatus including: a storage unit configured to store density characteristic information indicating an output density for each tone for each of the printing elements; a target value acquisition unit configured to acquire a target characteristic indicating a target value for each tone; and a first correction unit configured to correct the input image based on the density characteristic information and the target value.

Abstract: A generating device that generates a first color conversion LUT for converting an input image signal value into an output value of an actual color material installed in an image forming device, includes: an acquiring unit that acquires grid point position information indicating positions of the grid points in the first color conversion LUT; and a generating unit that generates the first color conversion LUT on the basis of grid point position information, wherein the generating unit determines whether or not an inflection point of an output value of the actual color material is at a position of the grid point, corrects at least some output values for at least two actual color materials in the second color conversion LUT in accordance with a determination result, and generates the first color conversion LUT obtained by thinning out the grid points in the second color conversion LUT.

Abstract: An image processing apparatus performs image processing to print a color materials of a first color and a second color. When a sum of a first gradation data for the first color and a second gradation data for the second color is equal to or smaller than the maximum value of thresholds of a first threshold matrix, a generation unit generates a second quantization data for the second color based on a result of comparing the second gradation data with a second threshold. When the sum is greater than the maximum value, the generation unit generates third gradation data by subtracting the maximum value from the sum and generates the second quantization data based on a result of comparing the third gradation data with the first threshold or a result of comparing a difference between the second gradation data and the third gradation data with the second threshold.

Abstract: When a sum of a first gradation data for a first color and a second gradation data for a second color is greater than the maximum value of thresholds of a first threshold matrix, a generation unit generates a first overlapping gradation data and second overlapping gradation data by dividing a value obtained by subtracting the maximum value from the sum. Further, the generation unit generates a first quantization data based on a result of comparing the first overlapping gradation data with the second threshold or a result of comparing a difference between the first gradation data and the first overlapping gradation data with the first threshold, and generates a second quantization data based on a result of comparing the second overlapping gradation data with the first threshold or a result of comparing a difference between the second gradation data and the second overlapping gradation data with the second threshold.

Abstract: To implement sharpness recovery processing suitable for an image, an image processing apparatus for generating, based on an input image, a halftone image to be provided to an image forming unit which forms an image on a printing medium, comprises: a recovery processing unit configured to perform, on the input image, recovery processing for compensating for sharpness degradation in an image formed by the image forming unit; a generating unit configured to generate a recovery amount of each pixel by using the input image having undergone the recovery processing; and a halftone processing unit configured to generate, based on the recovery amount, the halftone image by performing halftone processing on the input image having undergone the recovery processing.

Abstract: A color conversion look-up table generating device of the present invention includes a converting unit configured to convert an actual color material value of a target grid point in the color conversion look-up table and an actual color material value of a neighbor grid point of the target grid point into virtual color material values, and a correcting unit that corrects the actual color material value of the target grid point on the basis of a virtual color material amount of the target grid point and a virtual color material amount of the neighbor grid point, wherein the virtual color material value is an output value of a virtual color material that absorbs only light of spectral reflectance in each of divided blocks in a case in which spectral reflectance of the actual color material is divided into n (n is an integer of 3 or more) blocks.

Abstract: An image processing apparatus according an aspect of the present disclosure converts image signals indicating an image to output signals including signals corresponding to individual color components that an output device deals with by interpolation processing using a look-up table. The apparatus includes a first conversion unit and at least one second conversion unit. The first conversion unit converts the image signals to image signals corresponding to linearity of the signals corresponding to the individual color components. The at least one second conversion unit converts the image signals converted by the first conversion unit to the output signals by the interpolation processing.

Abstract: In order to implement preferred sharpness recovery processing for an image, an image processing apparatus which generates, based on input image data, halftone image data used for an image forming process of forming an image on a print medium. The apparatus converts the input image data into color material amount data used for the image forming process; performs, on the color material amount data, gamma correction to compensate for non-linearity of an input/output density in the image forming process; performs, on the color material amount data after the gamma correction, recovery processing to compensate for sharpness degradation of an image formed by the image forming process; and performs halftone processing on the color material amount data after the recovery processing to generate halftone image data.

Abstract: Appearance data including at least color information and gloss information of an object to be reproduced is inputted. Color mapping is performed to map the color information into a color reproducible range of an appearance reproduction apparatus, based on information indicating an appearance reproducible range of the appearance reproduction apparatus. A gloss reproducible range, in which the appearance reproduction apparatus can reproduce gloss while keeping the color information after the color mapping, is obtained based on the information indicating the appearance reproducible range. Gloss mapping is performed to map the gloss information into the gloss reproducible range. An output signal to be outputted to the appearance reproduction apparatus is generated based on mapped appearance data including the color information after the color mapping and the gloss information after the gloss mapping.

Abstract: To implement sharpness recovery processing suitable for an image, an image processing apparatus for generating, based on an input image, a halftone image to be provided to an image forming unit which forms an image on a printing medium, comprises: a recovery processing unit configured to perform, on the input image, recovery processing for compensating for sharpness degradation in an image formed by the image forming unit; a generating unit configured to generate a recovery amount of each pixel by using the input image having undergone the recovery processing; and a halftone processing unit configured to generate, based on the recovery amount, the halftone image by performing halftone processing on the input image having undergone the recovery processing.

Abstract: A color conversion look-up table generating device of the present invention includes a converting unit configured to convert an actual color material value of a target grid point in the color conversion look-up table and an actual color material value of a neighbor grid point of the target grid point into virtual color material values, and a correcting unit that corrects the actual color material value of the target grid point on the basis of a virtual color material amount of the target grid point and a virtual color material amount of the neighbor grid point, wherein the virtual color material value is an output value of a virtual color material that absorbs only light of spectral reflectance in each of divided blocks in a case in which spectral reflectance of the actual color material is divided into n (n is an integer of 3 or more) blocks.

Abstract: An apparatus comprises supply means for changing an amount of light sinusoidally and supplying to a projection means a patterned light signal for sequentially projecting on an object to be measured at least three patterns of patterned light having phase differences; obtainment means for obtaining image data acquired by capturing the object; first generation means for generating a phase image from image data acquired by capturing the object on which the patterned light is sequentially projected; second generation means for generating, based on the phase image, a shape image which indicates a distance between a surface of the object and a viewpoint in the capturing; and correction means for calculating an amount of correction for the shape image from a correspondence between a pixel value of a high-frequency shape image indicating a high-frequency component of the shape image and a pixel value of the phase image.