Method for receiving simulated templates in decorative printing

Abstract

The present invention provides a method and apparatus for receiving a simulated decorative template into a decorative printing process. The method includes performing a similarity comparison between at least one reference image among (1) to n hyperspectral digital reference images of the simulated decorative template and at least one actual image among (1) to n hyperspectral digital actual images of a carrier material with decoration, wherein a decoration-specific contour target is adjusted such that a digital template of the simulated decorative template can be output onto the carrier material via an output medium, and the color deviation between at least one reference image among (1) to n reference images of the simulated decorative template and at least one actual image among (1) to n actual images of the carrier material with decoration is lower than a preset expected value.

Description

Technical Field

[0001] The present invention provides a method and apparatus for receiving a simulated decorative template into a decorative printing process. The method includes performing a similarity comparison between at least one reference image among one to n hyperspectral digital reference images of the simulated decorative template and at least one actual image among one to n hyperspectral digital actual images of a substrate with decoration. The method further includes adjusting a decoration-specific contour target such that a digital template of the simulated decorative template can be output onto the substrate via an output medium, such that the color deviation between at least one reference image among one to n reference images of the simulated decorative template and at least one actual image among one to n actual images of the substrate with decoration is below a preset expected value. Background Technology

[0002] Color is a fundamental characteristic of printed decoration, produced through various techniques such as gravure printing or digital printing. In each of these techniques, the desired printed appearance is achieved by layering different pigment layers of a base color. Gravure printing is a technique where the element to be depicted exists as a recess in a printing die, such as a printing roller, which is dyed before printing. The printing ink is primarily located in the recess and is transferred to the object to be printed due to the contact pressure and adhesion of the printing die. Conversely, in digital printing, the printed image is directly transferred from a computer to a digital printer, such as a laser printer or inkjet printer, eliminating the need for a static printing die. The base colors cyan, magenta, yellow, and black (CMYK) are commonly used in digital printing. The CMYK color model is a subtractive color model, where the abbreviation CMYK represents the three color components cyan, magenta, and yellow, and the black portion representing the color depth. This color system allows for the depiction of color spaces (gamuts) that meet multiple requirements in different fields.

[0003] Printed decorations are used, for example, in the manufacture of floor laminates or as wall and ceiling covering elements. Several methods exist for decorating engineered wood panels. Therefore, in the past, it was common to use decorative paper to coat engineered wood panels, where no limits were set on the diversity of decorative papers with different patterns. As an alternative to using decorative paper on engineered wood panels, the feasibility of direct printing on engineered wood panels has been developed, where paper printing and its subsequent masking or direct lamination onto the engineered wood panel are eliminated. The main printing techniques used here are gravure printing and digital printing methods, as already mentioned. For the use of these printing methods, the printed decoration exists as a digital template depicting the colors and color distribution of the printed decoration.

[0004] The major challenge here is the digitization of the simulated decorative templates and the subsequent color-consistent printing. When providing digital data for the creation of decorative surfaces for various products such as furniture, flooring, panels, wall coverings, facades, and other consumer goods, templates or themes from different sources are first provided. Depending on the requirements, these templates or themes can come from various sources. Thus, on the one hand, natural products such as wood or stone can be used, or on the other hand, templates produced through other printing techniques such as gravure printing, screen printing, or even by means of manual fabrication can be used. The templates are then digitized using a scanner, where modern scanners are capable of digitizing large-sized templates in a single scan. Such simulated decorative templates, which often include decorations found in nature, are particularly popular with customers. Therefore, the color-consistent reproduction of the decoration offers significant economic benefits.

[0005] When digitizing a simulated template, a digital image of the simulated decorative template is created using conventional methods. This digital image can then be used in industrial printing processes. Furthermore, the digital image here consists of multiple pixels stored in an image file. Each pixel has a color value with respect to a color system defined for the digital image. By showing the color value of each individual pixel, a corresponding image for human perception is derived in a manner composed of individual pixels. Commonly used color systems include, for example, CMYK, RGB, or specific color systems such as sRGB or ISOcoatedv2_CMYK. Each color system here expands into a color space representing the possible colors contained in the digital image.

[0006] The problem here is that the color values ​​of the device-specific digital image generated by digitizing the simulated decorative template are related to the color system used as the basis during digitization, and thus are often inconsistent with the colors of the simulated decorative template. On the other hand, the color system used as the basis during digitization is usually different from the color system used when printing the decoration.

[0007] A central problem that has remained unsatisfactorily unsolved in all areas of the color-based or color processing industry is achieving a high degree of color consistency, in other words, the ability to reproduce a predetermined color with minimal color difference relative to the prototype. A crucial step in solving this problem is analyzing the color composition of the predetermined prototype.

[0008] DE 10 2010 007 125 A1 relates to a method for providing and using decorative data. The decorative data is obtained here by scanning patterns of existing decorations, layered materials, and / or real materials. At the heart of the method is the management of decorative data using a central decorative database. Color-consistent reproduction of the real-world patterns digitized by the method through a printing process is not the subject of the method.

[0009] DE 10 2017 202 031 A1 studies the correction of color deviations in digital printers. The goal of the method is to achieve consistent color reproduction of digitally printed templates during the printing process. It is not feasible to digitize and subsequently print a real-world decorative template using the described method.

[0010] EP 3 020 565 B1 studies methods for producing color- and detail-consistent reproductions of printed decorations using various printing techniques. The subject of these methods is to produce decorative prints with a similar quality appearance on a substrate, regardless of whether the decoration is printed digitally or analogously. No comparisons with simulated, i.e., real-world decorative templates are made in these methods. Color-consistent reproduction of simulated decorative templates is not the subject of these methods. Summary of the Invention

[0011] Therefore, the object of the present invention is to provide a method by means of which simulated decorative template colors can be received consistently in decorative printing, especially digital decorative printing.

[0012] The present invention achieves the stated objective through a method and apparatus for receiving a simulated decorative template into a decorative print.

[0013] The present invention particularly provides a method for receiving a simulated decorative template (10) into a decorative print, the method comprising performing a similarity comparison between at least one reference image among one to n hyperspectral digital reference images of the simulated decorative template and at least one actual image among one to n hyperspectral digital actual images of a carrier material (14) with decoration, wherein preferably n∈N,

[0014] The method is characterized by comprising the following steps:

[0015] a) Generate and store 1 to n hyperspectral digital reference images of the simulated decorative template;

[0016] b) Creating a decoration-specific reference target (30) from 1 to n hyperspectral digital reference images, wherein when n>1, creating a decoration-specific reference target (30) from 1 to n hyperspectral digital reference images includes combining the individual hyperspectral digital reference images in a combined manner by means of graphics software;

[0017] c) Create a decoration-specific contour target (31) from a digital template (21) of a simulated decoration template, wherein one or more parts of the digital template (21) of the simulated decoration template are used: said one or more parts depicting a decoration that is the same as one or more parts of one to n hyperspectral digital reference images;

[0018] d) Calculate the modified decoration-specific profile target from the decoration-specific reference target (30) and the decoration-specific profile target (31);

[0019] e) Taking into account the modified decorative-specific contour target, the digital template (21) of the simulated decorative template is output to the supporting material via the output device (13);

[0020] f) Generate one to n hyperspectral digital real images of the decorated carrier material (14), wherein one to n hyperspectral digital real images of the same local part as the one to n hyperspectral digital reference images are recorded.

[0021] g) Calculate the similarity index between at least one of one to n hyperspectral digital actual images of the decorated carrier material (14) and at least one of one to n hyperspectral digital reference images; and

[0022] h) When the similarity index is lower than the preset expected value, the modified decoration-specific contour target is adjusted and stored in consideration of the obtained color deviation. The digital template (21) of the simulated decoration template is output to the carrier material through the output device (13) in consideration of the adjusted modified decoration-specific contour target, and steps f) to g) are repeated.

[0023] In step h), the modified decorative-specific contour target is adjusted until the similarity index between at least one of the 1 to n hyperspectral digital actual images and at least one of the 1 to n hyperspectral digital reference images is higher than a preset expected value.

[0024] Hyperspectral digital images can be generated using a hyperspectral system, such as a hyperspectral camera or preferably a hyperspectral scanner. "Hyperspectral" here is understood as an image that records a very large number of closely spaced wavelengths. The eye perceives the environment in a multispectral manner using the wavelengths of the basic colors red, green, and blue. In contrast, a hyperspectral system records data from 20 to 250 channels, ranging from the ultraviolet range up to the long-wave infrared. Thus, a hyperspectral image contains more color information than the human eye perceives from the same image. This is used according to the invention to enable decorative printing of simulated printing templates that are color-coherent to the human eye. Therefore, according to the invention, a hyperspectral digital image represents a digital image depicting data from 20 to 250 channels, ranging from the ultraviolet range up to the long-wave infrared.

[0025] In the prior art, one method for generating hyperspectral images is known as... (The corresponding method for an Advanced Color Measurement System.) A hyperspectral system has multiple detectors. A hyperspectral data cube with two spatial dimensions and a spectral dimension is generated as the recorded result. Four basic techniques are provided to generate the hyperspectral data cube. The entire dataset is provided by means of a so-called snapshot, using a single detector output. In a spatial scan, each detector output provides a narrow strip of the spectrum of the template. In a spectral scan, each detector output provides a monochromatic spatial map of the template. In a spatial spectral scan, each detector output provides a spectrally encoded spatial map of the template.

[0026] Furthermore, an advantage of using the hyperspectral images according to the invention is that the images can be recorded at a high speed. This improves efficiency in the production process, thereby increasing the economics of the method according to the invention.

[0027] In step a) of the method according to the invention, 1 to n hyperspectral digital images are recorded from the simulated decorative template, wherein preferably n ∈ N. Here, n is between 1 and 100, preferably between 1 and 50, and particularly preferably between 1 and 10. For example, in wood decoration, n is preferably between 1 and 3.

[0028] One to n hyperspectral digital images of the simulated decorative template are used as reference images for the template. In one embodiment of the invention, the entire simulated decorative template is depicted using one to n hyperspectral digital images. In a preferred embodiment, the one to n hyperspectral digital images of the simulated decorative template depict one to n portions of the template that are particularly representative of the template. That is, they depict portions that particularly well reproduce the simulated decoration and its color design.

[0029] Therefore, in a preferred embodiment of the invention, one to n hyperspectral digital reference images depict one or more parts of the simulated decorative template for decorative characterization.

[0030] The simulated decorative template according to the invention is a physically existing decorative template as described at the beginning. Therefore, in principle, all types of natural and printed templates can be used. Examples of such decorative templates are wood grain for wood decoration, natural stone decoration, simulated printed templates on paper, and mechanically printed templates on various materials.

[0031] In method step (b), a decoration-specific reference target is created from 1 to n hyperspectral digital reference images according to the present invention, wherein when n>1, creating the decoration-specific reference target from 1 to n hyperspectral digital reference images includes combining the individual hyperspectral digital reference images in a combined manner by means of graphics software. Graphics software suitable for the stated purpose is known to those skilled in the art.

[0032] Decoration-specific reference targets contain decoration-specific color values ​​that simulate the printing template. In one embodiment of the invention, the color values ​​are shown in a standardized color field, where the entire color field is represented by a single color value. Here, specific color values ​​are associated with each color field, such that such color fields can be found one-to-one on the outline target. The typical number of color fields in a reference target is known to those skilled in the art. For example, a decoration-specific reference target may include color fields between 300 and 5000, preferably between 300 and 3000, and particularly preferably between 300 and 800. For the color values ​​in the color field, color systems such as CMYK, RGB, or specific color systems such as sRGB or ISOcoatedv2_CMYK may be used.

[0033] The determination of decoration-specific color values ​​for the simulated printing template is automated here by means of a computing unit, based on the frequency of each color value in one to n hyperspectral reference images of the simulated printing template. In one embodiment of the invention, all color values ​​appearing in the one to n reference images are represented as decoration-specific color values ​​in a decoration-specific reference target. In another embodiment of the invention, the most frequently occurring color value in the one to n reference images is depicted as a decoration-specific color value in the decoration-specific reference target. In this case, multiple color values ​​are depicted until the maximum possible number of color values ​​for the decoration-specific reference target is reached. Thus, the decoration-specific reference target contains color values ​​that are characteristic of the simulated decoration template.

[0034] Therefore, in a preferred embodiment of the invention, the decoration-specific reference target includes decoration-specific color values ​​that simulate the decoration template.

[0035] In method step c), a decoration-specific contour target is created from a digital template of a simulated decoration template, wherein one or more parts of the digital template of the simulated decoration template are used: said one or more parts depicting a decoration that is the same as one or more parts of one to n hyperspectral digital reference images.

[0036] According to the present invention, on the one hand, a decoration-specific reference target is created from one to n hyperspectral digital reference images, and on the other hand, a decoration-specific contour target independent of the reference target is created from a digital template simulating a decoration template. Therefore, the reference target and the contour target are preferably independent of each other and not derived from each other. By means of these two independent targets, the color deviation between the simulated template and the digital template of the simulated template can be determined. Thus, the method according to the present invention differs significantly from methods in the prior art. For example, in EP 3 578 939 A1, a digital desired image is created based on at least one calibrated hyperspectral image. Here, the digital desired image is derived from at least one calibrated hyperspectral image and is independent of the at least one calibrated hyperspectral image. Therefore, in EP 3 578 939 A1, there is no decoration-specific contour target in the sense of the present invention. More precisely, the calibration according to EP 3 578 939 A1 includes, for example, the calculation of an “average image” using average color values.

[0037] This is similar to creating a decoration-specific reference target, achieved based on the frequency of color values ​​in the digital image of a digital template simulating a decoration template. That is, the most common color values ​​are again determined, and these color values ​​are represented in the decoration-specific outline target as decoration-specific color values ​​of the digital template simulating the decoration template. Therefore, the decoration-specific outline target contains color values ​​characteristic of the digital template simulating the decoration template. The creation of the decoration-specific outline target is thus automated by means of a computing unit. In a preferred embodiment of the invention, the decoration-specific outline target contains decoration-specific color values ​​of the digital template simulating the decoration template.

[0038] If one to n reference images—preferably n∈N—do not depict the entire simulated decorative template, but only its parts, then the same parts of the decoration of the digital template of the simulated decorative template are preferably used to create a decoration-specific contour target. That is, color values ​​appearing in one or more corresponding parts of the decoration of the digital template of the simulated decorative template are used to create the decoration-specific contour target. Based on the frequency of the color values, the color values ​​form the decoration-specific color values ​​shown in the decoration-specific contour target. In one embodiment of the invention, all color values ​​appearing in one or more parts of the digital template of the simulated decorative template form the decoration-specific color values ​​shown in the decoration-specific contour target. In another embodiment of the invention, the most frequently occurring color value in one or more parts of the digital template of the simulated decorative template is depicted as the decoration-specific color value in the decoration-specific contour target. In this case, multiple color values ​​are depicted until the maximum possible number of color values ​​for the decoration-specific contour target is reached.

[0039] Therefore, in one embodiment of the invention, one or more portions of a digital template simulating a decorative template are used to create a decorative-specific contour target: the one or more portions depict one or more portions that are the same as one to n reference images.

[0040] The decorative contour target preferably has the same number of color fields as the decorative reference target.

[0041] However, in another embodiment of the invention, a decorative contour target may also have fewer color fields compared to a decorative reference target.

[0042] In another embodiment of the invention, not only are the same decorated portions used to create decoration-specific reference targets and decoration-specific contour targets, but exactly the same positions within the same portions are used to determine the color values ​​of the color field. This is particularly advantageous if the simulation template contains specific colors.

[0043] Preferably, it stores not only a reference target with specific decoration but also a contour target with specific decoration.

[0044] Digital templates for simulated decorative templates can already be provided in the form of digital images. In one embodiment of the invention, a digital template of a simulated decorative template is generated by scanning an input or photographing the simulated decorative template. If the digital template of a simulated printing template is generated by photographing, a digital photographic device or digital camera is preferably used.

[0045] In method step d), a modified decoration-specific contour target is calculated from a decoration-specific reference target and a decoration-specific profile target. To do this, the color value of the color field of the decoration-specific profile target is compared with the color value of the color field of the decoration-specific reference target. If the color value of the color field of the decoration-specific profile target deviates from the color value of the associated color field of the decoration-specific reference target, the color value is corrected accordingly. In this context, correction means changing the proportion of the various components of the color system used for the color value.

[0046] In a preferred embodiment, the color value of the decoration-specific contour target is modified such that the modified color value of the decoration-specific contour target corresponds to the color value of the decoration-specific reference target.

[0047] The process is executed entirely automatically by a computing unit. Procedures for performing this type of modification are known to those skilled in the art. The modified decoration-specific profile target forms a modified decoration-specific profile target. Preferably, the modified decoration-specific profile target is stored after the calculation.

[0048] In method step e), considering the modified decorative-specific contour target, a digital template simulating the decorative template is output onto the carrier material via an output device. According to the invention, the output of the digital template simulating the decorative template can be performed by means of digital printing. Digital printing can be performed directly or indirectly. Output is particularly preferred by means of direct digital printing. The decorated carrier material is produced by method step e).

[0049] If, when creating a decoration-specific reference target and a decoration-specific profile target, not only are the same parts of the decoration used, but also the exact same positions within those parts are used to determine the color values ​​of the color field, then when outputting the digital template of the simulated decoration template, the color values ​​can be correlated with the corresponding positions when the digital template of the simulated decoration template is output onto the supporting material, taking into account the modified decoration-specific profile target.

[0050] For example, paper, glass, metal, film, and engineered wood products, especially MDF or HDF boards, WPC boards, plywood, paint layers, plastic boards, and inorganic load-bearing boards, are suitable as load-bearing materials. Engineered wood products and paper are preferred according to the present invention.

[0051] In one embodiment of the invention, paper is used as the carrier material. The paper suitable as the base paper for printing is preferably white and has a g / m³ content of 60 g / m². 2 Up to 90g / m 2 Preferably 65g / m 2 Up to 80g / m 2 , particularly preferred 70g / m 2 The weight. The paper is primed before printing to prepare it. Suitable media that can be used as primes are known to those skilled in the art.

[0052] Digital printing for printing on at least one side of, for example, engineered wood panels can be performed using a digital printer with the aid of water-based digital printing inks, UV inks, or solvent-based inks. Water-based digital printing inks are preferred. The amount of digital printing ink used can be as low as 5 g / m³. 2 and 15g / m 2 Between, preferably between 6g / m 2 and 8g / m 2 between.

[0053] In one embodiment of the invention, a digital template simulating a decorative template is applied to a pre-primed support material. In one embodiment of the method, particularly when using engineered wood panels, before printing with the digital template simulating the decorative template, at least one primer comprising at least one resin and / or at least one varnish is applied to the side of the engineered wood panel to be printed, and then the primer is allowed to dry and / or harden.

[0054] Preferably, the side of the engineered wood panel to be printed is ground before applying the primer.

[0055] For priming, an aqueous resin solution and / or a radiation-curable filler can be applied to the side of the substrate to be printed. For example, an aqueous resin solution, such as melamine-formaldehyde resin, urea-formaldehyde resin, or melamine-urea-formaldehyde resin, can be used as a priming agent. It is also feasible to pre-coat or prime the substrate with 1K / 2K acrylic filler, UV filler, and / or ESH filler, and then subsequently cure the priming accordingly.

[0056] Preferably, the aqueous resin solution is used as a pre-coating or base coat for the engineered wood product, wherein the resin solution is an aqueous resin solution, particularly an aqueous solution of melamine-formaldehyde resin, urea-formaldehyde resin or melamine-formaldehyde resin.

[0057] The amount of liquid resin solution used for priming can be 10g / m². 2 and 80g / m 2 Between, preferably between 20g / m 2 and 50g / m 2 The solids content of the aqueous resin solution is between 30% and 80%, preferably between 40% and 60%, and particularly preferably between 55%. The liquid resin may additionally contain suitable wetting agents, hardeners, separating agents, and defoamers.

[0058] After coating the engineered wood panel with an aqueous resin solution for use as a pre-coating or priming layer, the liquid resin is dried to a humidity of 10%, preferably 6%, for example, in a convection oven or near-infrared oven.

[0059] In another embodiment of this method, a pre-coating or priming layer can be applied to the engineered wood product using 1K / 2K acrylic filler and / or ESH filler. The UV filler advantageously consists essentially of a UV-curable paint component, pigments, reactive diluents, and a base forming agent acting as a chain initiator.

[0060] In the aforementioned case, the filler coating amount can be 50 g / m². 2 Up to 150g / m 2 Preferably 50g / m 2 Up to 100g / m2 The quantity specification here refers to 100% filler.

[0061] Alternatively, the filler used for the undercoat can be in the form of pigment, thereby altering or improving the printing result.

[0062] According to the present invention, a transparent base coat is particularly preferred for pre-coating the engineered wood panel.

[0063] In another embodiment of this method, prior to printing on at least one side of the engineered wood panel, at least one layer of pigmented primer is applied to the side of the engineered wood panel to be printed, said primer preferably being water-based. The pigmented primer can either be applied directly to the untreated surface of the material panel or applied over a previous, preferably transparent primer.

[0064] The water-based pigmented primer can also be applied in more than one layer (e.g., 3 to 10 layers, preferably 5 to 8 layers, particularly preferably 7 layers), wherein after each layer is applied, the pigmented primer is dried, for example, in a convection dryer or a near-infrared dryer. The water-based pigmented primer preferably contains at least one light-colored pigment, particularly preferably at least one white pigment.

[0065] White pigments are colorless inorganic pigments with a high refractive index (greater than 1.8), primarily used to produce optical whiteness in coatings or, for example, as fillers in plastics. The white pigments according to the invention can be selected from the group consisting of titanium dioxide, barium zinc white, barium sulfate, zinc oxide, zinc sulfide, and calcium sulfate. Barium zinc white is a white pigment comprising barium sulfate and zinc sulfide. According to the invention, titanium dioxide is preferably used as a white pigment in water-based pigmented undercoats because it has the highest refractive index, thus providing the highest covering power among known white pigments.

[0066] In method step f), one to n hyperspectral digital real images of the decorated carrier material are generated, wherein the one to n hyperspectral digital real images depict the same local part of the decoration as the one to n hyperspectral digital reference images.

[0067] In a preferred embodiment, one to n reference images and one to n actual images are generated under equivalent conditions according to method steps a) and f). This ensures that changed environmental conditions have no effect on the recorded images and their color values. Preferably, the hyperspectral digital actual images are recorded by means of a hyperspectral camera, and particularly preferably by means of a hyperspectral scanner, as described at the beginning. In a particularly preferred embodiment of the invention, one to n reference images are recorded by means of the same mechanism used for recording hyperspectral images, said mechanism preferably being a hyperspectral scanner.

[0068] As already mentioned, preferably, one or more local hyperspectral digital actual images are also recorded from one to n hyperspectral digital reference images. It is advantageous here to record as many actual images as the reference images created in method step a).

[0069] In step g) of the method according to the invention, a similarity index is obtained between at least one actual image from 1 to n actual images of the decorative carrier material and at least one reference image from 1 to n reference images. The similarity index is obtained by similarity comparison. This similarity comparison is always performed between image pairs. Image pairs are formed by actual images and reference images depicting the same part of the decoration. Therefore, it is particularly preferable to obtain the similarity index between the actual image depicting the same part of the decoration and the reference image separately.

[0070] In a preferred embodiment of the invention, a similarity index is calculated between n actual images and n reference images, where n > 1. The accuracy of the method according to the invention is increased by comparing the similarity of more than one image pair.

[0071] Similarity comparisons are performed using software on the computation unit. This is done if steps a) and f) of the method are used... The method for generating hyperspectral images can advantageously perform similarity comparisons via a similarity index of the associated software. This application is known to those skilled in the art. The similarity index here represents the color deviation between image pairs. The larger the similarity index, the smaller the color values ​​of the images in the image pair deviate from each other. Therefore, when a digital template of the analog decorative template is output to the output device used in step e) of the method, the reproduction of the analog decorative template is more color-consistent with the digital template of the analog decorative template.

[0072] A pre-set expectation value is set for the similarity index, which should not be lower than a certain threshold. This expectation value is determined based on the decoration and the colors contained within it. Similarly, the customer's requirement for consistent color reproduction of the simulated decoration can be considered by selecting the expectation value. The expectation value is expressed as a percentage and falls within the range of 75% to 100%, preferably 85% to 100%, and particularly preferably 89% to 100%. The higher the selected expectation value, the smaller the permissible color deviation between the simulated decoration template and the substrate with the decoration. That is, the more color-consistent the reproduction of the simulated decoration in digital printing using this invention will be. Through this pre-set value, it can be determined how color-consistent the simulated decoration template should be output on a specific output device using a digital template with the simulated decoration template. That is, how much color consistency there is between the decoration on the substrate with the decoration and the simulated decoration template.

[0073] If the obtained similarity index is lower than the preset expected value, then in method step h), the modified decoration-specific contour target is adjusted in consideration of the color deviation obtained in the similarity comparison, and the adjusted modified decoration-specific contour target is stored.

[0074] The modified, decoration-specific contour target can be adjusted using conventional software on the computing unit via the obtained similarity index. In this case, a color profile is calculated from the similarity index, and the color values ​​in the modified, decoration-specific contour target are adjusted, i.e., changed, using the color profile.

[0075] Subsequently, taking into account the adjusted and modified decoration-specific reference target, a digital template of the simulated decoration template is output onto a carrier material via an output device. Preferably, the same output device as in the previous method steps is used. It is also preferable to print the digital template of the simulated decoration template onto the same type of carrier material as in the previous method steps. This is meaningful in order to minimize the influence of the output device and the carrier material on the color values ​​of the decoration on the decorated carrier material. According to the invention, method steps f) to g) are then repeated. That is, under the conditions already performed, 1 to n hyperspectral actual images are again recorded from the decorated carrier material. Subsequently, the similarity index between at least one of the 1 to n actual images of the decorated carrier material and at least one of the 1 to n reference images is recalculated.

[0076] According to the present invention, according to method step h), the modified decoration-specific contour target is adjusted until the similarity index between at least one of the 1 to n actual images and at least one of the 1 to n reference images is higher than a preset expected value.

[0077] According to the present invention, at least one similarity index between an actual image and a reference image is calculated. However, it is also possible to calculate similarity indices for n actual images and n reference images, where n>1. Accordingly, n similarity indices are calculated. According to the present invention, if any one of the calculated n similarity indices is lower than a preset expected value, the modified decoration-specific contour target is adjusted.

[0078] In a preferred embodiment of the invention, a modified decoration-specific contour target or an adjusted modified contour target is stored as a digital original pattern simulating a decoration template. A decorated carrier material is generated in method step e) by means of the modified decoration-specific contour target or the adjusted modified contour target. The similarity index between at least one actual image of the decorated carrier material and at least one reference image of the carrier material obtained in method step g) is higher than a preset expected value.

[0079] That is, if the similarity index between the decorated carrier material and the simulated decorative template is higher than a preset expected value, the modified decoration-specific contour target used to generate the decorated carrier material, or the adjusted modified decoration-specific contour target used, is stored as the original pattern. For this purpose, the similarity index between at least one actual image among 1 to n actual images of the decorated carrier material and at least one reference image among 1 to n reference images, obtained in method step g), must be higher than the preset expected value. In one embodiment of the invention, all similarity indices between 1 to n actual images of the decorated carrier material and 1 to n reference images, obtained in method step g), must be higher than the preset expected value.

[0080] In this way, the original digital pattern can be advantageously used as a template for decorative printing, especially by means of the output device used in the method. This provides a digital printing template for simulating the decorative template, by means of which decorative printing with consistent colors of the simulated decorative template is feasible.

[0081] In a preferred embodiment, the present invention provides a method for receiving a simulated decorative template into a decorative print, the method comprising performing a similarity comparison between at least one reference image among one to n hyperspectral digital reference images of the simulated decorative template and at least one actual image among one to n hyperspectral digital actual images of a carrier material having the decoration, wherein n is between 1 and 100.

[0082] The method is characterized by comprising the following steps:

[0083] a) Generate and store 1 to n hyperspectral digital reference images of a simulated decorative template, wherein each hyperspectral digital reference image has a hyperspectral data cube with two spatial dimensions and a spectral dimension;

[0084] b) Creating a decoration-specific reference target from 1 to n hyperspectral digital reference images, wherein when n>1, creating a decoration-specific reference target from 1 to n hyperspectral digital reference images includes combining the individual hyperspectral digital reference images in a combined manner using graphics software;

[0085] c) Create a decoration-specific contour target from a digital template of a simulated decoration template using a computing unit, wherein one or more of the following portions of the digital template of the simulated decoration template are used: said one or more portions depicting a decoration that is the same as one or more portions of one to n hyperspectral digital reference images;

[0086] d) Calculate the corrected decoration-specific profile target from the decoration-specific reference target and the decoration-specific profile target by comparing the color values ​​of the color field of the decoration-specific profile target with the color values ​​of the color field of the decoration-specific reference target and correcting the color values ​​of the color field of the decoration-specific profile target that deviate from the color values ​​of the associated color field of the decoration-specific reference target.

[0087] e) Taking into account the modified decorative-specific profile target, the digital template of the simulated decorative template is output to the supporting material via an output device;

[0088] f) Generate 1 to n hyperspectral digital real images of the decorated carrier material, wherein 1 to n hyperspectral digital real images of the same local part as the 1 to n hyperspectral digital reference images are recorded.

[0089] g) Determine the color deviation and similarity index between at least one of one to n hyperspectral digital actual images depicting the same part of a decorated carrier material and at least one of one to n hyperspectral digital reference images; and

[0090] h) When the similarity index is lower than the preset expected value, the modified decoration-specific contour target is adjusted and stored in consideration of the obtained color deviation. The digital template of the simulated decoration template is output to the carrier material through the output device in consideration of the adjusted modified decoration-specific contour target, and steps g) to h) are repeated.

[0091] In step i), the modified decorative-specific contour target is adjusted until the similarity index between at least one of the 1 to n hyperspectral digital actual images and at least one of the 1 to n hyperspectral digital reference images is higher than a preset expected value.

[0092] Of particular advantage, the method according to the invention includes, between step b) and step c), an additional step of creating a digital template of the simulated decorative template by scanning the input or photographing the simulated decorative template.

[0093] For production purposes where the original pattern is used for decorative printing, such as decorative printing on engineered wood panels, the engineered wood panel is first prepared as described above. The original pattern is then printed onto the engineered wood panel at production scale.

[0094] It is also feasible to coat one or more printed decorations with at least one protective layer, preferably two or three layers, comprising abrasion-resistant particles, natural fibers, synthetic fibers and / or other additives, wherein resins such as melamine-formaldehyde resin, urea-formaldehyde resin, acrylate resin and polyurethane resin can be used as suitable adhesives.

[0095] The wear-resistant particles are preferably selected from the group consisting of: alumina, corundum, boron carbide, silicon dioxide, silicon carbide, and glass beads. As natural and / or synthetic fibers, fibers selected from the group consisting of: wood fibers, cellulose fibers, wool fibers, hemp fibers, and organic or inorganic polymer fibers are particularly used.

[0096] Conductive materials, flame retardants, luminescent materials, and metals can be added as additives. Conductive materials can be selected from the group consisting of: coal ash, carbon fibers, metal powders, and nanoparticles, especially carbon nanotubes. Combinations of these materials can also be used. Phosphates, borates, especially ammonium polyphosphate, tris(tribromoneopentyl)phosphate, zinc borate, or borate complexes of polyols are preferably used as flame retardants. Inorganic or organic fluorescent and / or phosphorescent materials, especially zinc sulfite and alkaline earth aluminates, are preferably used as luminescent materials.

[0097] In another embodiment of this method, the printed carrier material, which may have a protective layer, particularly composed of formaldehyde resin, is further processed or refined in a short-cycle (KT) press. The resin layer is melted in the KT press, and the laminate is hardened into a laminate. During further processing in the KT press, a surface structure can also be created on the surface of the carrier material, such as a engineered wood panel, using a structured press. This surface structure can optionally be implemented in a manner consistent with the finish (a so-called finish-synchronized structure). In wood finishes, a structure with a pore structure following the grain can be present. In multiple finishes, the structure can be a recess in the area of ​​the seam filler line included in the finish.

[0098] This method is performed in a device for receiving a simulated decorative template into a decorative print, wherein the device includes:

[0099] - At least one mechanism for generating and storing 1 to n hyperspectral digital images;

[0100] - At least one mechanism for creating and storing decorative reference targets;

[0101] - At least one mechanism for creating and storing decorative targets with specific outlines;

[0102] - At least one mechanism for calculating and storing the modified, decoration-specific profile target;

[0103] - At least one mechanism for outputting a digital template simulating a decorative template, taking into account a modified decorative-specific profile target or an adjusted modified decorative-specific profile target.

[0104] - At least one mechanism for calculating a similarity index between at least one reference image from 1 to n hyperspectral digital reference images and at least one actual image from 1 to n hyperspectral digital actual images; and

[0105] - At least one mechanism for adjusting a modified decorative-specific contour target, taking into account the similarity index between at least one reference image among 1 to n hyperspectral digital reference images and at least one actual image among 1 to n hyperspectral digital actual images.

[0106] The advantages and advantageous implementations of the method according to the invention described above also apply to the device according to the invention, so that reference is made to the content mentioned above.

[0107] As mentioned, at least one mechanism for generating and storing hyperspectral digital images preferably involves a hyperspectral scanner and / or a hyperspectral camera. Preferably, one to n hyperspectral digital reference images and one to n hyperspectral digital actual images are recorded using the same mechanism for generating the hyperspectral digital images. In another embodiment, one to n reference images can be recorded using a first mechanism for generating and storing hyperspectral digital images, and one to n actual images can be recorded using another mechanism for generating and storing hyperspectral digital images.

[0108] At least one mechanism for creating and storing a decoration-specific reference target, at least one mechanism for creating and storing a decoration-specific contour target, and at least one mechanism for calculating and storing a modified decoration-specific contour target are preferably computing units having corresponding software known to those skilled in the art. Preferably, the at least one mechanism for creating and storing a decoration-specific reference target, at least one mechanism for creating and storing a decoration-specific contour target, and at least one mechanism for creating and storing a decoration-specific contour target are the same computing unit. This implementation is particularly economical and resource-saving. The computing unit is, for example, a processing computer or a control computer.

[0109] According to the present invention, at least one mechanism for outputting a digital template simulating a decorative template, taking into account a modified decorative-specific profile target or an adjusted decorative-specific profile target, is a device for direct or indirect digital printing, preferably a device for direct digital printing.

[0110] Furthermore, the device includes at least one mechanism for calculating a similarity index between at least one reference image from 1 to n reference images and at least one actual image from 1 to n actual images, and at least one mechanism for adjusting a corrected decoration-specific contour target considering the calculated color deviation between the calculated similarity index between the at least one reference image from 1 to n hyperspectral digital reference images and at least one actual image from 1 to n hyperspectral digital actual images. These mechanisms are computational units with software known to those skilled in the art. In a preferred embodiment, the at least one mechanism for calculating a similarity index between at least one reference image from 1 to n reference images and at least one actual image from 1 to n actual images, and the at least one mechanism for adjusting the corrected decoration-specific contour target considering the calculated color deviation between the at least one reference image from 1 to n reference images and at least one actual image from 1 to n actual images, are the same computational unit.

[0111] In one embodiment, the device according to the invention further includes at least one mechanism for generating a digital template for simulating a decorative template. The mechanism for generating and storing the digital template for simulating the decorative template is, for example, a scanner or photographic device with a computing unit, particularly a digital photographic device or a digital camera.

[0112] A production line for printing an original pattern onto a particleboard includes a mechanism for generating a primer, a mechanism for printing the original pattern, preferably a digital printer, and, in a further variation, at least one mechanism for applying a protective layer to a carrier material having the corresponding printed decoration. The mechanism or device for applying the protective layer is preferably located downstream of the printing line.

[0113] In a preferred embodiment, the production line has at least one short-cycle press for pressing a carrier material with printed decorations and a protective layer disposed thereon.

[0114] It is feasible, through the method and apparatus according to the invention, to receive the simulated decorative template colors consistently during decorative printing. By presetting an expected value for the similarity index, customer requirements for consistent color reproduction can be advantageously considered. This increases the economic efficiency of the invention, as the print quality during decorative printing can match existing customer expectations. Furthermore, the economic efficiency of the invention is further improved by allowing multiple method steps to be performed on the same mechanism of the apparatus. Therefore, in one embodiment of the invention, it is feasible to execute the entire method by means of a computing unit, a mechanism for generating hyperspectral images, and an output device.

[0115] By providing an original pattern for the simulated decorative template, the present invention also enables easy matching with other printing tasks. For example, it facilitates matching with other output devices, such as other printing devices or other carrier materials. If the simulated decorative template is output to a digital device different from the one used to create the original pattern, and / or the simulated decorative template is output to a digital device different from the carrier material used to create the original pattern, the original pattern can be used as a reference for adjusting the printing process. Advantageously, in this way, it is also possible to output the simulated decorative template with consistent colors on different printers and / or on different carrier materials.

[0116] Therefore, in one embodiment of the invention, an original pattern outline target, initially existing digitally, is created from the original pattern. In addition to the original pattern, the original pattern outline target also includes an additional color field with standard colors having a previously defined color space. The standard colors are preferably preset by software. Suitable for this purpose is, for example, the Colorgate Fingerprint Tool software from Colorgate Corporation. The original pattern outline target can then be output to a carrier material according to the invention on each suitable output device. A carrier material decorated with the original pattern outline target is produced. The color field of the original pattern outline target output to the carrier material is then measured using colorimetric techniques. For this purpose, in a preferred embodiment of the invention, one to n hyperspectral digital images are recorded from the carrier material decorated with the original pattern outline target. Preferably, multiple hyperspectral images are recorded such that the entire output original pattern outline target is depicted. The color values ​​of the output original pattern outline target's color field are determined from the one to n hyperspectral digital images using suitable software. The color deviation between the color values ​​of the digitally existing original pattern outline target's color field and the color values ​​of the original pattern outline target output to the carrier material is then calculated according to the invention.

[0117] Therefore, in a preferred embodiment, software is used to compare the color values ​​of the original pattern outline target's color field with the color values ​​of the output original pattern outline target's color field, and when a deviation exists between the color values, a corrected original pattern outline target is generated and stored, taking into account the obtained color deviation. Software suitable for this purpose is known to those skilled in the art.

[0118] In another embodiment, the color values ​​of the color field of the original pattern outline target, which exists digitally, are compared with the color values ​​of the color field of the original pattern outline target output to the carrier material via a similarity index. If the similarity index is lower than a preset expected value, a corrected original pattern outline target is calculated and stored, taking into account the obtained color deviation.

[0119] Therefore, in one embodiment of the method according to the invention, a digital original pattern outline target and a modified original pattern outline target are generated from the original pattern, the method comprising the following steps.

[0120] • Create a digital original pattern outline target;

[0121] • The original digital pattern outline target is output onto the substrate using an output device;

[0122] • Generate one to n hyperspectral digital images of the carrier material with the original patterned outline target;

[0123] • Determine the color values ​​of the original pattern profile target output to the support material from 1 to n hyperspectral digital images;

[0124] • Calculate the color deviation between the color values ​​of the original pattern outline target, which exists digitally, and the color values ​​of the original pattern outline target output to the carrier material;

[0125] • Generate and store the corrected original pattern outline target while taking into account the desired color deviation.

[0126] In one embodiment of the invention, the corrected original pattern profile target is re-output onto a carrier material using an existing output device. Advantageously, the output is onto a carrier material of the same type as the previous output. One to n hyperspectral digital images of the corrected original pattern profile target are regenerated and output onto the carrier material, and the similarity between the hyperspectral digital images and the original pattern profile target is recalculated. This method allows for control over the color consistency between the original pattern profile target output onto the carrier material and the original pattern profile target existing digitally. Correction can be performed if necessary.

[0127] Determining the color values ​​of the original pattern contour target output to the support material from 1 to n hyperspectral digital images and comparing the color values ​​of the original pattern contour target's color field (existing digitally) with the color values ​​of the original pattern contour target's color field output to the support material is preferably performed automatically by means of suitable software on a computing unit. Suitable software for this purpose is known to those skilled in the art. Furthermore, in one embodiment of the invention, the color values ​​of the color field can also be manually changed by means of suitable software.

[0128] Advantageously, by means of the implementation of the method, the original pattern can be easily and quickly matched to different output devices and / or different carrier materials by creating an original pattern outline target and a modified original pattern outline target. Thus, for each additional output device and / or each additional carrier material used, an original pattern outline target and a modified original pattern outline target are generated, which can then be used to achieve color-consistent decorative printing of the digital template simulating the decorative template. Suitable output devices and suitable carrier materials are all those already described within the scope of this invention.

[0129] This allows for the advantageous achievement of color-consistent decorative printing of analog decorative templates onto digital templates, especially digital decorative printing, on different substrates and / or with the aid of different output devices. Attached Figure Description

[0130] The invention is described in detail below with reference to the accompanying drawings and six embodiments. The drawings show:

[0131] Figure 1 An embodiment of the method according to the present invention is shown. Detailed Implementation

[0132] Figure 1 A simulated decorative template 10 is shown, from which one to n hyperspectral digital reference images are recorded using a device 11 for recording hyperspectral images. One of the images depicts a portion of the simulated decorative template 10. The portion is... Figure 1 The image is represented by a small box in the simulated decoration template 10. One to n reference images are stored in the computing unit 12, and a decoration-specific reference target 30 is created in the computing unit. A digital template 21 for the simulated decoration template is created by means of a mechanism 20 for generating a digital template for the simulated decoration template. The mechanism 20 for generating the digital template for the simulated decoration template can be, for example, a scanner or a digital camera.

[0133] A digital template 21 simulating a decorative template is stored in a computing unit 12, and a decoration-specific contour target 31 for the digital template 21 is created in the computing unit 12. According to the invention, a modified decoration-specific contour target is calculated in the computing unit 12 from a decoration-specific reference target 30 and the decoration-specific contour target 31. The digital template 21 simulating a decorative template is output onto a carrier material using an output device 13 with the modified decoration-specific contour target, resulting in a decorated carrier material 14. The output device 13 may be a device for gravure printing, or particularly preferably a device for direct digital printing.

[0134] According to the present invention, one to n hyperspectral digital actual images are recorded from a decorative carrier material 14 by means of a device 15 for recording hyperspectral images. The actual images depict the same portions of the decoration as reference images. This... Figure 1 The image is represented by a small frame on a decorative carrier material 14. In the calculation unit 12, a similarity index between the actual image and the reference image is calculated according to the method of the present invention, and if the similarity index is lower than a preset expected value, the decorative-specific contour target 31 is adjusted. Next, according to the present invention, the corrected decorative-specific contour target is adjusted in the calculation unit 12, taking into account the obtained similarity index and the color deviation derived therefrom.

[0135] Subsequently, the digital template 21 simulating the decorative template is output onto the carrier material using the adjusted and modified decoration-specific contour target on the output device 13, thereby generating a decorated carrier material 14 again. One to n hyperspectral digital actual images are recorded from the decorated carrier material 14 using the device 15 for recording hyperspectral images. In the calculation unit 12, a similarity index between the actual images and reference images is calculated according to the method according to the invention, and if the similarity index is again lower than a preset expected value, the modified decoration-specific contour target is readjusted. The adjustment of the modified decoration-specific contour target is performed according to method step h) until the similarity index between at least one of the 1 to n actual images and at least one of the 1 to n reference images is higher than the preset expected value.

[0136] Example 1

[0137] Five hyperspectral digital reference images are recorded from a simulated decorative template showing wood grain. A decoration-specific reference target is created from the reference images using software on a computing unit. The simulated decorative template is scanned using a scanner, and a digital template of the simulated decorative template is generated. This digital template is also stored in the computing unit. A decoration-specific contour target is created from five regions of the digital template of the simulated decorative template using software on the computing unit, these five regions depicting areas of the decoration identical to regions in the five reference images of the simulated decoration. In the computing unit, a modified decoration-specific contour target is automatically created from the decoration-specific reference target and the decoration-specific contour target. Taking into account the modified decoration-specific contour target, the digital template of the simulated decorative template is printed onto a pre-primed engineered wood panel using a digital printer. For this purpose, the engineered wood panel is pre-ground, treated with an aqueous resin solution, and subsequently fitted with a white base. Five hyperspectral digital actual images of the decoration printed onto the engineered wood panel are recorded. Actual images of regions of the printed decoration identical to regions in the reference images are recorded. The following similarity index is derived from a similarity comparison:

[0138] Image pairs Similarity Index 1 94％ 2 93％ 3 95％ 4 90％ 5 92％

[0139] At the beginning of the method, an expected value that should not be lower than 89% for the similarity index is determined. This ensures that all similarity indices are above the expected value. The modified, decoration-specific outline target is then stored as the original pattern.

[0140] Example 2

[0141] Five hyperspectral digital reference images are recorded from a simulated decorative template showing wood grain. A decoration-specific reference target is created from the reference images using software on a computing unit. The simulated decorative template is scanned using a scanner, and a digital template of the simulated decorative template is generated. This digital template is also stored in the computing unit. A decoration-specific contour target is created from five regions of the digital template of the simulated decorative template using software on the computing unit, these five regions depicting areas of the decoration identical to regions in the five reference images of the simulated decoration. In the computing unit, a modified decoration-specific contour target is automatically created from the decoration-specific reference target and the decoration-specific contour target. Taking into account the modified decoration-specific contour target, the digital template of the simulated decorative template is printed onto a pre-primed engineered wood panel using a digital printer. For this purpose, the engineered wood panel is pre-ground, treated with an aqueous resin solution, and subsequently coated with a white base. Five hyperspectral digital actual images of the decoration printed onto the engineered wood panel are recorded. Actual images of regions of the printed decoration identical to regions in the reference images are recorded. The following similarity index is derived from a similarity comparison:

[0142] Image pairs Similarity Index 1 93％ 2 85％ 3 84％ 4 91％ 5 88％

[0143] At the beginning of the method, an expected value was determined that 89% of the similarity index should not be lower than a certain value. Therefore, the similarity indices for image pairs 2, 3, and 5 were lower than the expected values.

[0144] A color profile was calculated using Colorgate software, and a modified decoration-specific contour target was adjusted within the software based on this color profile. Taking into account the adjusted, modified decoration-specific contour target, the decoration was printed onto a particleboard using the same digital printer. As with previous particleboards, the particleboard was primed with an aqueous resin solution and then sanded. Five hyperspectral digital real-world images of the printed decoration were re-recorded from the particleboard. Real-world images of localized areas of the printed decoration that were identical to the reference images were also recorded. Similarity comparisons yielded the following similarity index:

[0145] Image pairs Similarity Index 1 96％ 2 93％ 3 91％ 4 94％ 5 96％

[0146] Now all similarity indices are above the expected value. The adjusted, modified, decoration-specific outline target is then stored as the original pattern.

[0147] Example 3

[0148] Five hyperspectral digital reference images are recorded from a simulated decorative template showing wood grain. A decoration-specific reference target is created from the reference images using software on a computing unit. The simulated decorative template is scanned using a scanner, and a digital template of the simulated decorative template is generated. This digital template is also stored in the computing unit. A decoration-specific contour target is created from five regions of the digital template of the simulated decorative template using software on the computing unit. These five regions depict the same areas of the decoration as the regions in the five reference images of the simulated decoration. In the computing unit, a modified decoration-specific contour target is automatically created from the decoration-specific reference target and the decoration-specific contour target. Taking into account the modified decoration-specific contour target, the digital template of the simulated decorative template is printed onto a pre-primed paper layer on a digital printer. For pre-priming, a primer is applied to the paper layer. The paper layer used has a g / m² content of 70 g / m³. 2 The weight. Five hyperspectral digital actual images of the decoration printed onto the paper layer were recorded. Actual images of the parts of the printed decoration that are locally identical to the reference image were recorded. The following similarity index was obtained from the similarity comparison:

[0149] Image pairs Similarity Index 1 94％ 2 93％ 3 95％ 4 90％ 5 92％

[0150] At the beginning of the method, an expected value that should not be lower than 89% for the similarity index is determined. This ensures that all similarity indices are above the expected value. The modified, decoration-specific outline target is then stored as the original pattern.

[0151] Example 4

[0152] Five hyperspectral digital reference images are recorded from a simulated decorative template showing wood grain. A decoration-specific reference target is created from the reference images using software on a computing unit. The simulated decorative template is scanned using a scanner, and a digital template of the simulated decorative template is generated. This digital template is also stored in the computing unit. A decoration-specific contour target is created from five regions of the digital template of the simulated decorative template using software on the computing unit. These five regions depict the same areas of the decoration as the regions in the five reference images of the simulated decoration. In the computing unit, a modified decoration-specific contour target is automatically created from the decoration-specific reference target and the decoration-specific contour target. Taking into account the modified decoration-specific contour target, the digital template of the simulated decorative template is printed onto a pre-primed paper layer on a digital printer. For pre-priming, a primer is applied to the paper layer. The paper layer used has a g / m² content of 70 g / m³. 2The weight. Five hyperspectral digital actual images of the decoration printed onto the paper layer were recorded. Actual images of the parts of the printed decoration that are locally identical to the reference image were recorded. The following similarity index was obtained from the similarity comparison:

[0153]

[0154]

[0155] At the beginning of the method, an expected value that should not be lower than 89% was determined for the similarity index. Therefore, the similarity indices for image pairs 1, 4, and 5 were lower than the expected values.

[0156] A color profile was calculated using Colorgate software, and a modified, decoration-specific contour target was adjusted within the software based on this profile. Taking into account the adjusted, modified, decoration-specific contour target, the decoration was printed onto a paper layer using the same digital printer, the paper layer having a primer as the previous paper layer. Five hyperspectral digital real-world images were re-recorded from the printed decoration on the paper layer. Real-world images of the parts of the printed decoration that were locally identical to the reference image were also recorded. Similarity comparisons yielded the following similarity index:

[0157] Image pairs Similarity Index 1 96％ 2 93％ 3 91％ 4 94％ 5 96％

[0158] Now all similarity indices are above the expected value. The adjusted, modified, decoration-specific outline target is then stored as the original pattern.

[0159] Example 5 – Finishing of HDF Board

[0160] After applying the primer, the HDF board is printed digitally using the original patterns according to Examples 1 and 2, and then further processed as follows:

[0161] The printed HDF boards are separated upstream on the production line and transported at a speed of 28 m / min through subsequent production equipment.

[0162] In the first roller coating apparatus, approximately 70g of melamine resin liquid (solid content: 55% by weight), containing common auxiliary materials (hardener, wetting agent, etc.), is coated onto the surface of the board. Similarly, melamine resin is coated onto the underside of the board using the same first roller coating apparatus (coating amount: 60g resin liquid / m²). 2 Solid content: approximately 55% by weight.

[0163] Subsequently, using a spreading device, 14g of corundum / m 2 (F 200) was applied to the surface. Then, at a concentration of 25 g / m², it was sprayed onto the surface. 2A melamine resin layer (solid content: 55% by weight) is applied. The melamine resin layer also contains common auxiliary materials. The melamine resin is also applied to the underside of the board using a roller coating device (coating amount: 50g resin liquid / m²). 2 Solid content: approximately 55% by weight). Dry the plates in a circulating air dryer.

[0164] Melamine resin was then coated onto the surface of the plate, the melamine resin additionally still containing glass spheres. The glass spheres had a diameter of 60 μm-80 μm. The coating amount of resin was approximately 20 g of melamine resin liquid / m³. 2 (Solid content: 61.5% by weight). In addition to hardeners and wetting agents, a separating agent is also included in the formulation. The coating amount of glass beads is approximately 3 g / m². 2 Similarly, melamine resin is coated onto the underside of the board using a roller coating machine (coating amount: 40g resin liquid / m²). 2 Solids content: approximately 55% by weight). The plates were dried again in a circulating air dryer and then coated again with melamine resin containing glass beads. Cellulose (Vivapur 302) was also included as an additional component. Approximately 20g of melamine resin liquid / m³ was coated again. 2 (Solids content: 61.6% by weight). Approximately 3g of glass beads and 0.25g of cellulose / m³ are then coated again. 2 In addition to hardeners and wetting agents, the formulation also contains a separating agent. Melamine resin is applied to the underside of the board using a roller coating machine (coating amount: 30g resin liquid / m²). 2 (Solids content: approximately 55% by weight). The resin was dried again in a circulating air dryer, and subsequently at 200°C and 400 N / cm. 2 Under pressure, the press plate is clamped in a short-cycle press. The clamping time is 10 seconds. The press plate with a wooden structure is used as a structural supply device.

[0165] The amount of resin is 5 g / m² per roller coating. 2 Up to approximately 100g / m 2 The content of the resin can vary within a range; here, the solid content of the resin can also vary from 50% by weight to approximately 80% by weight. The corundum content is at 2 g / m³. 2 Up to 30g / m 2 The amounts of the added materials, glass and corundum, change accordingly.

[0166] Example 6 - Paper

[0167] Apply the primer to a concentration of 70g / m 2The printing base paper is printed with the original pattern according to Embodiments 1 and 2 in digital printing, and then further processed as follows:

[0168] Decorative paper layers are impregnated with an aqueous melamine resin. After drying, the paper layers are cut and stacked for pressing into a laminate. As described below, different layers are stacked to manufacture the laminate. As a countermeasure, resin-impregnated paper layers are first applied to the underside of a carrier board, which in this embodiment is particleboard. Impregnated decorative paper layers are applied to the upper side of the carrier board, and a so-called overlay is applied thereon. A transparent paper layer impregnated with resin and equipped with hard material particles is used as the overlay. The stack is moved into a short-cycle press and pressed into a laminate under heat and pressure. For this purpose, a structured press plate is used on the upper side in the short-cycle press, such that a structure is created on the surface of the laminate. The resulting structure is at least partially synchronized with the decoration of the paper layers.

[0169] List of reference numerals

[0170] 10 Simulated Decoration Templates

[0171] 11, 15 Devices for recording hyperspectral images

[0172] 12 Calculation Units

[0173] 13 Output devices

[0174] 14. Decorative load-bearing materials

[0175] 20. Mechanisms for generating digital templates for simulating decorative templates

[0176] 21. Digital templates for simulated decoration templates

[0177] 30 Decorate specific reference targets

[0178] 31. Decorate specific contour targets

Claims

1. A method for receiving a simulated decorative template (10) into a decorative print, the method comprising performing a similarity comparison between at least one reference image among one to n hyperspectral digital reference images of the simulated decorative template and at least one actual image among one to n hyperspectral digital actual images of a carrier material (14) with decoration, wherein n ∈ N, Its features are, The method includes the following steps: a) Generate and store 1 to n hyperspectral digital reference images of the simulated decorative template, wherein each hyperspectral digital reference image depicts data from 20 to 250 channels from wavelengths in the ultraviolet range up to long-wave infrared. b) Creating a decoration-specific reference target (30) from the 1 to n hyperspectral digital reference images, wherein when n>1, creating a decoration-specific reference target (30) from the 1 to n hyperspectral digital reference images includes combining the individual hyperspectral digital reference images in a combined manner by means of graphics software; c) Create a digital template (21) of the simulated decorative template by scanning the input or photographing the simulated decorative template (10); d) Create a decoration-specific contour target (31) from the digital template (21) of the simulated decoration template by means of a computing unit, wherein one or more parts of the digital template (21) of the simulated decoration template are used: the one or more parts depicting a decoration that is the same as one or more parts of the 1 to n hyperspectral digital reference images; e) Calculate the corrected decorative-specific contour target from the decorative-specific reference target (30) and the decorative-specific contour target (31) by comparing the color value of the color field of the decorative-specific contour target with the color value of the color field of the decorative-specific reference target and correcting the color value deviation of the color field of the decorative-specific contour target from the color value of the associated color field of the decorative-specific reference target. f) Taking into account the modified decorative-specific contour target, the digital template (21) of the simulated decorative template is output to the supporting material via the output device (13); g) Generate one to n hyperspectral digital real images of the decorated carrier material (14), wherein the one to n hyperspectral digital real images of the decoration are recorded as local parts of the decoration that are identical to the one to n hyperspectral digital reference images; h) Determine the color deviation and similarity index between at least one of the 1 to n hyperspectral digital actual images of the same part of the decorative carrier material (14) and at least one of the 1 to n hyperspectral digital reference images; as well as i) When the similarity index is lower than the preset expected value, the modified decoration-specific contour target is adjusted and stored in consideration of the obtained color deviation. The digital template (21) of the simulated decoration template is output to the carrier material through the output device (13) in consideration of the adjusted modified decoration-specific contour target, and steps g) to h) are repeated. The modified decorative-specific contour target is adjusted according to method step i) until the similarity index between at least one of the 1 to n hyperspectral digital actual images and at least one of the 1 to n hyperspectral digital reference images is higher than a preset expected value.

2. The method according to claim 1, characterized in that, A digital template (21) of the simulated decorative template is generated by scanning the input or photographing the simulated decorative template (10).

3. The method according to any one of the preceding claims, characterized in that, The 1 to n hyperspectral digital reference images depict one or more localities of the simulated decorative template (10) for the decorative characterization.

4. The method according to claim 1 or 2, characterized in that, According to method step f), the digital template (21) of the simulated decorative template is output by means of digital printing.

5. The method according to claim 1 or 2, characterized in that, In step h), the color deviation between n actual images and n reference images is calculated, where n>1.

6. The method according to claim 1 or 2, characterized in that, In step f), the digital template of the simulated decorative template is output onto a carrier material selected from the group consisting of paper, glass, metal, film, artificial board, paint layer, plastic board and inorganic carrier board.

7. The method according to claim 6, characterized in that, The load-bearing material is selected from the group consisting of: MDF board or HDF board, WPC board, and plywood.

8. The method according to claim 1 or 2, characterized in that, The modified decoration-specific contour target or the adjusted modified decoration-specific contour target is stored as a digital original pattern of the simulated decoration template (10). In method step f), a decorated carrier material (14) is generated by means of the modified decoration-specific contour target or the adjusted modified decoration-specific contour target. The similarity index between at least one actual image of the decorated carrier material (14) obtained in method step h) and at least one reference image of the 1 to n actual images is higher than a preset expected value.

9. The method according to claim 8, characterized in that, The method for generating a digital original pattern outline target and a modified original pattern outline target from the original pattern includes the following steps: • Create a digital original pattern outline target; • The digital original pattern outline target is output onto the carrier material using an output device; • Generate one to n hyperspectral digital images of the carrier material having the original pattern outline target; • Determine the color values ​​of the original pattern outline target output to the carrier material from the 1 to n hyperspectral digital images; • Calculate the color deviation between the color value of the original pattern outline target, which exists digitally, and the color value of the original pattern outline target's color field output to the carrier material; • Generate and store the corrected original pattern outline target while taking into account the desired color deviation.

10. An apparatus for receiving a simulated decorative template (10) into a decorative print, wherein the apparatus is configured to perform the method according to any one of claims 1 to 9. The device includes: - At least one mechanism for generating and storing 1 to n hyperspectral digital images (11, 15); - At least one mechanism for creating and storing decorative reference targets; - At least one mechanism for creating and storing decorative targets with specific outlines; - At least one mechanism for calculating and storing the modified, decoration-specific profile target; - At least one mechanism for outputting a digital template of the simulated decorative template, taking into account a modified decorative-specific profile target or an adjusted modified decorative-specific profile target. - At least one mechanism for determining the similarity index between at least one reference image among the 1 to n hyperspectral digital reference images and at least one actual image among the 1 to n hyperspectral digital actual images; as well as - At least one mechanism for adjusting the modified decorative-specific contour target, taking into account the similarity index between at least one reference image among the 1 to n hyperspectral digital reference images and at least one actual image among the 1 to n hyperspectral digital actual images.

11. The device according to claim 10, characterized in that, The device also includes at least one mechanism for generating and storing a digital template (21) of the simulated decorative template.

12. The device according to any one of claims 10 or 11, characterized in that, The apparatus (11, 15) used to generate the 1 to n hyperspectral digital images is a hyperspectral scanner or a hyperspectral camera.

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