Abstract: Provided are a profile creation apparatus, a non-transitory computer-readable storage medium storing a profile creation program and a profile creation method. The profile creation apparatus includes a standard-color-profile obtaining section that obtains a standard color profile and a reference-device-profile obtaining section that obtains a reference-device profile. The profile creation apparatus further includes a color-conversion-table creation section that creates a color conversion table by combining the standard color profile and reference-device profile with being weighted such that a weighed ratio of the standard color profile increases as chroma calculated from input color values of the color conversion table increases, in a predetermined chroma region. The profile creation apparatus further includes a color conversion section that performs color conversion on a print image by using the color conversion table and outputs the print image to a certain printing device.

Abstract: Provided are a profile creation apparatus, a non-transitory computer-readable storage medium storing a profile creation program and a profile creation method. The profile creation apparatus includes a standard-color-profile obtaining section that obtains a standard color profile and a reference-device-profile obtaining section that obtains a reference-device profile. The profile creation apparatus further includes a color-conversion-table creation section that creates a color conversion table by combining the standard color profile and reference-device profile with being weighted such that a weighed ratio of the standard color profile increases as chroma calculated from input color values of the color conversion table increases, in a predetermined chroma region. The profile creation apparatus further includes a color conversion section that performs color conversion on a print image by using the color conversion table and outputs the print image to a certain printing device.

Abstract: Provided is a profile creation method for creating a color conversion profile for an image forming apparatus which forms an image by performing, on an input color value having total use amount of color material exceeding set amount, a process for reducing the total use amount, by interpolating lattice points in a look-up table. The profile creation method includes: determining whether a point of an input color value with the total use amount of color material being equal to the set amount exists between two adjacent lattice points in the look-up table; and, when it is determined so, calculating an output color value of an interpolation point set between the two lattice points, by a polynomial interpolation method for performing interpolation calculation by using, besides output color values of the two lattice points, an output color value of a lattice point other than the two lattice points.

Abstract: Provided is a profile creation method for creating a color conversion profile for an image forming apparatus which forms an image by performing, on an input color value having total use amount of color material exceeding set amount, a process for reducing the total use amount, by interpolating lattice points in a look-up table. The profile creation method includes: determining whether a point of an input color value with the total use amount of color material being equal to the set amount exists between two adjacent lattice points in the look-up table; and, when it is determined so, calculating an output color value of an interpolation point set between the two lattice points, by a polynomial interpolation method for performing interpolation calculation by using, besides output color values of the two lattice points, an output color value of a lattice point other than the two lattice points.

Abstract: A storage medium which stores a program to cause an image forming system to execute a process includes, (a1) forming a product image, which is subjected to color correction by a product LUT being applied thereto, and a verification image, which is subjected to color correction by a verification LUT being applied thereto on same paper, (b1) subjecting said verification image that is formed in (a1) to color measurement, (c1) determining whether verification LUT is applicable to color correction of the product image based on a difference between said color measurement values of the verification image that is measured in (b1) and target values, and (d1) forming the product image and the verification image, which are respectively subjected to color correction by applying the verification LUT that is determined to be applicable, and applying another verification LUT to color correction of said verification image, on same paper.

Abstract: A storage medium which stores a program to cause an image forming system to execute a process includes, (a1) forming a product image, which is subjected to color correction by a product LUT being applied thereto, and a verification image, which is subjected to color correction by a verification LUT being applied thereto on same paper, (b1) subjecting said verification image that is formed in (a1) to color measurement, (c1) determining whether verification LUT is applicable to color correction of the product image based on a difference between said color measurement values of the verification image that is measured in (b1) and target values, and (d1) forming the product image and the verification image, which are respectively subjected to color correction by applying the verification LUT that is determined to be applicable, and applying another verification LUT to color correction of said verification image, on same paper.

Abstract: A printing system of the present invention includes: a generating unit which performs a rasterizing process to print data while performing a color conversion process by applying a multi-dimensional lookup table for calibration, which is for matching a color of the image to be printed by a printing unit by combining base colors to a target color and for keeping the color of the image consistent, to generate image data; a storage unit which stores the image data; a calibration unit which applies a first one-dimensional lookup table for calibration to calibrate the color information of the image data at a first round of printing the image, and applies a second one-dimensional lookup table for calibration newer than the first one-dimensional lookup table for calibration to calibrate the color information of the image data at a second round of newly printing the image.

Abstract: A printing system of the present invention includes: a generating unit which performs a rasterizing process to print data while performing a color conversion process by applying a multi-dimensional lookup table for calibration, which is for matching a color of the image to be printed by a printing unit by combining base colors to a target color and for keeping the color of the image consistent, to generate image data; a storage unit which stores the image data; a calibration unit which applies a first one-dimensional lookup table for calibration to calibrate the color information of the image data at a first round of printing the image, and applies a second one-dimensional lookup table for calibration newer than the first one-dimensional lookup table for calibration to calibrate the color information of the image data at a second round of newly printing the image.

Abstract: A calibration system including: an image forming unit that outputs a chart including patches corresponding to input CMY values of tertiary and secondary colors; a color measuring unit that measures patch colors and outputs colorimetric values; and a control unit that sets a target profile correlating the input CMY values of the tertiary and secondary colors with target color values; inputs the colorimetric values; calculates differences between the input colorimetric values and the target color values; acquires corrected CMY values relative to the input CMY values of the tertiary and secondary colors; acquires first and second color components based on the corrected CMY values of the tertiary and secondary colors, respectively; calculates output CMY values of a primary color through weighted averaging of the first and second color components; and generates a primary color correction table to determine the output CMY values relative to the input CMY values.

Abstract: The control program of the present invention causes an image processing device to execute the steps of: executing a color conversion process on image data containing various color patches (S105); causing a printer to print the image data after the color conversion process and causing a color measuring device to measure the L*a*b* color values corresponding to the individual color patches contained in the output of the image data (S107); converting the CMYK color values corresponding to the individual color patches contained in the image data after the color conversion process into the L*a*b* color values by means of the input conversion table for the printer (S106); and calculating the differences between the L*a*b* color values measured by the color measuring device and the L*a*b* color values after the conversion based by means of the input conversion table for the printer (S108).

Abstract: The present invention provides a system of a digital color proof in which consistent images are obtained while minimizing density variation in spite of various variations of conditions due to the use of a silver halide light-sensitive color material, specifically, the present invention provides a method for forming proof images similar to printed images in terms of various characteristics such as the paper quality of silver halide light-sensitive materials, the dot gain, and the density.

Abstract: An image forming material is disclosed which comprises a support and provided thereon, an image forming layer and an image protective layer in that order, the image forming layer containing a colorant and a first binder resin, and the image protective layer containing fine particles in an amount of 2 to 150 mg/M.sup.2 and a second binder resin and having a thickness of 0.03 to 1.0 .mu.m, wherein an image is formed by exposing the material to a high density energy light to reduce adhesion between the image forming layer and the support and then removing the image forming layer at exposed portions.