Abstract: Method of manufacturing decorative panels comprising the steps: inkjet printing on a substrate an oligochromatic pattern by an inkjet printing system to form a decorative layer (250); impregnating by a resin impregnator (320) the decorative layer with a thermosetting resin; heat pressing (500) by a heating press (550) the impregnated decorative layer (41) together with a core layer (410) for forming a decorative panel (650); wherein the method comprises an extra step of identifying, by using a color control unit (250), a color acceptance of the decorative panel between the step of forming the decorative layer (200) and the step of impregnating the decorative layer.

Abstract: A method of color mapping color values of an oligochromatic pattern comprising the following steps: determining an image-gamut, in a N-dimensional device independent color system (ND-DICS), of said oligochromatic pattern; wherein said image-gamut comprises said color values of said oligochromatic pattern; and determining a skeleton (500) of said image-gamut; and performing an adaption on said skeleton (500) in said ND-DICS by a set of N-dimensional-transforming steps (30) and determining for points of said skeleton (500), a path in said ND-DICS that corresponds to said adaption; and color mapping said color values, of said oligochromatic pattern, based on said determined paths (35) of said points of said skeleton (500).

Abstract: A method of color mapping color values of an oligochromatic pattern comprising the following steps: determining an image-gamut, in a N-dimensional device independent color system (ND-DICS), of said oligochromatic pattern; wherein said image-gamut comprises said color values of said oligochromatic pattern; and determining a skeleton (500) of said image-gamut; and performing an adaption on said skeleton (500) in said ND-DICS by a set of N-dimensional-transforming steps (30) and determining for points of said skeleton (500), a path in said ND-DICS that corresponds to said adaption; and color mapping said color values, of said oligochromatic pattern, based on said determined paths (35) of said points of said skeleton (500).

Abstract: Method of manufacturing decorative panels comprising the steps: inkjet printing on a substrate an oligochromatic pattern by an inkjet printing system to form a decorative layer (250); impregnating by a resin impregnator (320) the decorative layer with a thermosetting resin; heat pressing (500) by a heating press (550) the impregnated decorative layer (41) together with a core layer (410) for forming a decorative panel (650); wherein the method comprises an extra step of identifying, by using a color control unit (250), a color acceptance of the decorative panel between the step of forming the decorative layer (200) and the step of impregnating the decorative layer.

Abstract: A colorant splitting method performed by a colorant splitter wherein an n-dimensional color in an n-dimensional colorant space is converted to an m-dimensional colorant space by a colorant splitting curve set and wherein the colorant splitting curve set is the result of interpolation of a set of colorant splitting curve sets to improve the image quality of reproduced content and to improve the usage of total coverage of the colorants.

Abstract: A standard printer characterization target is printed with a reference printer and measured. From the measured data, a model is derived that describes for each ink the behavior of each individual ink in combination with different combinations of the other inks. In order to reduce the complexity for obtaining a printer model of a second printer, a second target is printed that includes only a subset of the color patches in the standard printer characterization target. With the model and interpolation, it is possible to reconstruct colorimetric data for missing color patches in the reduced target.

Abstract: A standard printer characterization target is printed with a reference printer and measured. From the measured data, a model is derived that describes for each ink the behavior of each individual ink in combination with different combinations of the other inks. In order to reduce the complexity for obtaining a printer model of a second printer, a second target is printed that includes only a subset of the color patches in the standard printer characterization target. With the model and interpolation, it is possible to reconstruct colorimetric data for missing color patches in the reduced target.

Abstract: A method including the steps of selecting an n-ink model for a color device, for transferring a set of colorant values in colorant space to a set of color values in color space; selecting a printer characteristic of the n-ink model, wherein the printer characteristic indicates the regularity of the n-ink model; evaluating, for the n-ink model, a set of one or more values and/or ranges for the printer characteristic, thus determining the regularity of the n-ink model; and modifying the n-ink model such that the modified n-ink model is regular, if, based on the evaluation, the n-ink model was not regular.

Abstract: A raster image processing method and a raster image processor validate content objects in a document based on similarity, especially on continuity, to convert the similar objects with one or more same parameters of an image manipulation method to achieve a correct reproduction of the document.

Abstract: A colorant splitting method performed by a colorant splitter wherein an n-dimensional colour in an n-dimensional colorant space is converted to an m-dimensional colorant space by a colorant splitting curve set and wherein the colorant splitting curve set is the result of interpolation of a set of colorant splitting curve sets to improve the image quality of reproduced content and to improve the usage of total coverage of the colorants.

Abstract: A raster image processing method and a raster image processor validate content objects in a document based on similarity, especially on continuity, to convert the similar objects with one or more same parameters of an image manipulation method to achieve a correct reproduction of the document.

Abstract: A method including the steps of selecting an n-ink model for a color device, for transferring a set of colorant values in colorant space to a set of color values in color space; selecting a printer characteristic of the n-ink model, wherein the printer characteristic indicates the regularity of the n-ink model; evaluating, for the n-ink model, a set of one or more values and/or ranges for the printer characteristic, thus determining the regularity of the n-ink model; and modifying the n-ink model such that the modified n-ink model is regular, if, based on the evaluation, the n-ink model was not regular.

Abstract: A method for creating a set of metameric printed color patches on a color printer enables visual assessment under a specific illuminant if the colors of a printed product have faded.

Abstract: The invention deals with a method for replacing the colorant values of a raster image by a new set of colorant values that is for example optimized for a standardized printing process. According to the invention, a forward look up table is identified that transforms the colorant values in the raster image into color values. The color values in this look up table are separated into new colorant values to obtain a colorant to colorant interpolation look up table. This is done by using an inverse transformation that is based on the forward look up table using appropriate separation parameters for the standardized printing process. The method has the advantage that it enables to map pure colorant values in the original image back onto pure colorant values in the transformed image.

Abstract: A method for creating a set of metameric printed color patches on a color printer enables visual assessment under a specific illuminant if the colors of a printed product have faded.

Abstract: A method separates a color vector into a colorant vector for a printing system that uses more than four colorants, for example cyan, magenta, yellow, black, orange and green colorants. According to the method, the separation process is split up into partial four colorant processes that contain opponent colors. For example, a first partial process is a cyan, magenta, yellow and black process; a second one is an orange, magenta, yellow and black process; and a third one is a cyan, green, yellow and black process. Continuity of magnitudes of the colorants is achieved across the boundaries of the color gamuts of the partial processes by imposing specific constraints on the combinations of colorants to render a given color. A computer implemented system and a print system are based on the method.

Abstract: An output color profile, such as an ICC output profile, contains a look-up table to separate the color of a pixel, for example a CIELAB color, into a set of colorant values, for example CMYK colorants. In practice, most CMYK images have been separated using one of a limited set of standardized output profiles. The problem to be solved is guessing which one of these standardized output profiles has been used to separate a specific image. For this purpose the CMYK values of the image are analyzed. The analysis involves calculating a distance in the CMYK space between the CMYK values of an image, and the CMYK values produced by different output profiles. A profile is selected based on these distances, for example by selecting the profile yielding the shortest distance. This profile is then used for converting the CMYK colorant values of the image into CIELAB color values.

Abstract: A method for obtaining a first representation of a digital image by means of a first output device and a second representation of the digital image by means of a second output device, wherein the first output device has a first, device dependent, colorant space and the second output device has a second, device dependent, colorant space, the method including (a) determining a transformation for transforming a set of colorant values of a pixel of the digital image from the first to the second colorant space; (b) selecting a particular set of colorant values in the first colorant space; and (c) modifying the transformation for the particular set of colorant values.

Abstract: A method for making a dot for dot proof for a printing device, such as a press, on another device, such as a proofer, the method including (a) inputting, at pixel level, binary or pseudo-binary data indicating at a given pixel screened colorant values of the printing device; (b) inputting contone colorant values of the printing device indicating a color in a neighborhood of the given pixel; (c) outputting colorant values for the other device at the given pixel, based on the input contone colorant values and on the input binary or pseudo-binary data, such that a color match is obtained with a given color behavior of the printing device.

Abstract: A method and a system for outputting an image having a specific color on an output device, the method including (a) analyzing the image; (b) creating a model for the output device, based on the analysis, wherein the model encompasses the specific color and is made in a particular space having a one-to-one relation to a device independent color space.