Color formulation conversion method and color formulation conversion device

Abstract

According to an embodiment disclosed in the present document, a color formulation conversion method may comprise the steps of: obtaining reference formulation information applied to a reference base; outputting, through a color estimation unit, specific color prediction information corresponding to a specific base except the reference base when the reference formulation information is applied to the specific base as specific formulation information applied to the specific base; and generating converted formulation information corresponding to the specific base by converting the specific formulation information on the basis of the specific color prediction information and reference color measurement information corresponding to the reference base to which the reference formulation information is applied.

Description

Color combination conversion method and color combination conversion device

[0001] Cross-citation with related applications

[0002] This invention claims the benefit of priority to Korean Patent Application No. 10-2023-0160530, filed on November 20, 2023, the entire contents of which are incorporated herein by reference.

[0003] Technology field

[0004] Embodiments disclosed in this document relate to a method and apparatus for converting a color combination.

[0005] Paint is largely composed of a colorant (which defines color) and a base product (which contains other ingredients). In the paint system, the base product and the colorant are distributed separately. When needed, a set amount of colorant is added to the base product to create the desired color. Due to this characteristic, the base product and the colorant are semi-finished products, produced in a fixed, repetitive manner. Creating a specific color requires color mixing information.

[0006] The product (base) and colorant in this document may mean that they are standardized and repeatedly produced, and the same type of colorant may be used for each product (base).

[0007] For example, the formulations of water-based ink products that use the same water-based ink colorant can be interchanged.

[0008] For example, the formulations of oil-based ink products that use the same oil-based ink colorant can be interchanged.

[0009] Meanwhile, as consumer color demands diversify, new colors are constantly being developed. These new colors must be perceived as the same by the consumer's eyes, even when the product (base) used is different. To achieve this, color combinations (e.g., base and colorant combinations) must be designed separately for each product.

[0010] However, there can be countless color combinations due to the combination of new colors that are continuously developed and numerous types of products (bases). For example, if the number of newly developed colors is 1249 and the number of products is 40, 49960 (1249*40) combination designs must be performed. However, there is a problem that designing these color combinations one by one consumes enormous cost and time.

[0011] Due to the above problems, in the past, it was not possible to design color combinations corresponding to each product (base) for new colors, and instead, it was limited to designing individual color combinations corresponding to one or a small number of products.

[0012] However, if a color combination corresponding to a specific product that meets the needs of consumers has not been designed / prepared, a new color combination corresponding to the specific product must be designed so that it can be recognized as the same color as the color expressed by the color combination designed based on other products, which poses the problem of requiring a lot of cost and time.

[0013] The embodiments disclosed in this document are intended to provide a color combination conversion method and a color combination conversion device using the same.

[0014] The embodiments disclosed in this document are intended to provide a color combination conversion method and a color combination conversion device using the same for quickly and accurately deriving specific combination information corresponding to a specific base.

[0015] The embodiments disclosed in this document are intended to provide a color combination conversion method and a color combination conversion device using the same for reducing the number of color combination designs in deriving conversion combination information.

[0016] The embodiments disclosed in this document are intended to provide a color combination conversion method and a color combination conversion device using the same that can express the same color regardless of the type of base selected by a user.

[0017] A color mixing conversion method according to an embodiment disclosed in the present document may include: a step of obtaining reference mixing information applied to a reference base; a step of outputting, through a color estimation unit, specific mixing information applied to a specific base other than the reference base, specific color prediction information corresponding to the specific base when the reference mixing information is applied to the specific base; and a step of generating conversion mixing information corresponding to the specific base by converting the specific mixing information based on reference color measurement information and the specific color prediction information corresponding to the reference base to which the reference mixing information is applied.

[0018] As an example, in the step of generating the conversion mixing information, the conversion mixing information can be generated by converting the concentration information of at least a portion of at least one specific color corresponding to the specific mixing information based on the reference color measurement information and the specific color prediction information.

[0019] As an example, in the step of generating the conversion mixing information, the conversion mixing information can be generated by additionally converting the concentration information of the specific base.

[0020] As an example, the reference color measurement information may include first reference color measurement information to nth reference color measurement information corresponding to the first wavelength to the nth wavelength, and the specific color prediction information may include first specific color prediction information to nth specific color prediction information corresponding to the first wavelength to the nth wavelength.

[0021] As an example, before the step of outputting the specific color prediction information, the method may further include the steps of: (1) inputting learning reference color measurement information of a learning reference base to which learning reference mixing information is applied to the color estimation unit so as to cause the color estimation unit to output learning specific color prediction information corresponding to the learning specific base when the learning reference mixing information is applied to the learning specific base as learning specific mixing information applied to a learning specific base excluding the learning reference base; (2) generating a specific color loss based on the learning specific color prediction information and the corresponding specific color GT (ground truth) information; and (3) updating at least some of the parameters of the color estimation unit using the specific color loss.

[0022] As an example, the learning reference color measurement information may include first learning reference color measurement information to nth learning reference color measurement information corresponding to the first wavelength to the nth wavelength, the learning specific color prediction information may include first learning specific color prediction information to nth learning specific color prediction information corresponding to the first wavelength to the nth wavelength, and the specific color GT information may include first specific color GT information to nth specific color GT information corresponding to the first wavelength to the nth wavelength.

[0023] As an example, the error between the conversion color measurement information corresponding to the specific base to which the conversion mixing information is applied and the specific color prediction information may be within a critical error range.

[0024] A color mixing conversion device according to an embodiment disclosed in this document may include an acquisition unit that acquires reference mixing information applied to a reference base; a color estimation unit that outputs specific mixing information applied to a specific base excluding the reference base, and specific color prediction information corresponding to the specific base when the reference mixing information is applied to the specific base; and a generation unit that generates conversion mixing information corresponding to the specific base by converting the specific mixing information based on reference color measurement information and the specific color prediction information corresponding to the reference base to which the reference mixing information is applied.

[0025] As an example, the generation unit can generate the conversion mixing information by converting the concentration information of at least a portion of at least one specific color corresponding to the specific mixing information based on the reference color measurement information and the specific color prediction information.

[0026] As an example, the generating unit can generate the conversion mixing information by additionally converting the concentration information of the specific base.

[0027] As an example, the reference color measurement information may include first reference color measurement information to nth reference color measurement information corresponding to the first wavelength to the nth wavelength, and the specific color prediction information may include first specific color prediction information to nth specific color prediction information corresponding to the first wavelength to the nth wavelength.

[0028] As an example, the color estimation unit obtains learning reference color measurement information of a learning reference base to which learning reference mixing information is applied, outputs learning specific mixing information applied to a learning specific base excluding the learning reference base, and learning specific color prediction information corresponding to the learning specific base when the learning reference mixing information is applied to the learning specific base, and generates a specific color loss based on the learning specific color prediction information and the corresponding specific color GT (ground truth) information, and at least some of the parameters of the color estimation unit may be updated using the specific color loss.

[0029] As an example, the learning reference color measurement information may include first learning reference color measurement information to nth learning reference color measurement information corresponding to the first wavelength to the nth wavelength, the learning specific color prediction information may include first learning specific color prediction information to nth learning specific color prediction information corresponding to the first wavelength to the nth wavelength, and the specific color GT information may include first specific color GT information to nth specific color GT information corresponding to the first wavelength to the nth wavelength.

[0030] As an example, the error between the conversion color measurement information corresponding to the specific base to which the conversion mixing information is applied and the specific color prediction information may be within a critical error range.

[0031] The embodiments disclosed in this document can provide a color combination conversion method and a color combination conversion device using the same.

[0032] The embodiments disclosed in this document can provide a color combination conversion method and a color combination conversion device using the same for quickly and accurately deriving specific combination information corresponding to a specific base.

[0033] The embodiments disclosed in this document can provide a color combination conversion method and a color combination conversion device using the same for reducing the number of color combination designs in deriving conversion combination information.

[0034] The embodiments disclosed in this document can provide a color combination conversion method and a color combination conversion device using the same that can express the same color regardless of the type of base selected by a user.

[0035] In addition, various effects may be provided, either directly or indirectly, through this document.

[0036] FIG. 1 is a drawing illustrating a color mixing conversion device according to one embodiment disclosed in this document.

[0037] FIG. 2a and FIG. 2b are diagrams showing the difference between reference reflectance measurement information corresponding to a reference base and specific reflectance measurement information corresponding to a specific base by wavelength when the same mixing information is applied to the reference base and the specific base.

[0038] FIGS. 3A to 3F are diagrams showing the difference between reference reflectance measurement information corresponding to a reference base and specific reflectance measurement information corresponding to a specific base, by wavelength, when the same mixing information is applied to a reference base and a specific base.

[0039] FIG. 4 is a flowchart schematically illustrating a color combination conversion method according to one embodiment disclosed in this document.

[0040] FIG. 5 is a diagram schematically illustrating the effect when the color combination conversion information generated according to the color combination conversion method according to the embodiment disclosed in this document is applied to a specific base.

[0041] In connection with the description of the drawings, the same or similar reference numerals may be used for identical or similar components.

[0042] Hereinafter, various embodiments of the present invention will be described with reference to the attached drawings. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that the present invention encompasses various modifications, equivalents, and / or alternatives of the embodiments.

[0043] In this document, the singular form of a noun corresponding to an item may include one or more of said items, unless the context clearly indicates otherwise. In this document, phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B, or C," "at least one of A, B, and C," and "at least one of A, B, or C" may each include any one of the items listed together in that phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish the corresponding element from other corresponding elements, and do not limit the corresponding elements in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as being “coupled” or “connected” to another component (e.g., a second component), with or without the terms “functionally” or “communicatively,” it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0044] Each component (e.g., a module or a program) described in this document may include one or more entities. According to various embodiments, one or more components or operations of the components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to integration. According to various embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0045] The term "module" or "part" used in this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0046] Various embodiments of the present document may be implemented as software (e.g., a program or an application) including one or more instructions stored in a machine-readable storage medium (e.g., memory). For example, a processor of the device may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the device to operate to perform at least one function according to the at least one instruction called. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, "non-transitory" only means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and this term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily in the storage medium.

[0047] FIG. 1 is a drawing to help understand a color mixing conversion device according to one embodiment disclosed in this document, and schematically illustrates a color mixing conversion device (100).

[0048] Referring to FIG. 1, the color mixing conversion device (100) may include an acquisition unit (110), a color estimation unit (120), and a generation unit (130).

[0049] First, the acquisition unit (110) can acquire reference mixing information applied to the reference base.

[0050] At this time, the standard mixing information may include information on at least one colorant.

[0051] For example, the reference mixing information may include information about the concentration of at least one colorant.

[0052] As another example, the reference mixing information may include information about the concentration of at least one colorant and the concentration of the reference base.

[0053] For example, reference color measurement information and reference mixing information corresponding to a reference base to which reference mixing information is applied can be matched and managed in a database.

[0054] For example, the color information disclosed in this document may include, but is not limited to, lab color values ​​in the Lab color space. For example, the color information disclosed in this document may include reflectance information.

[0055] For example, the reference color measurement information is L in the Lab color space corresponding to the color of the reference base to which the reference mixing information is applied. * Value (Base L) * value), a * Value (based on a) * value), b * Value (Based on b * may include values).

[0056] For reference, L (brightness information), a (red-green information), and b (yellow-blue information) are information according to the Lab color space (L*a*b), and the brightness information (L) can be information indicating brightness with a value between 0 (black) and 100 (white). In addition, the red-green information (a) is information indicating whether the color is closer to red or green, and can indicate that the color is closer to green if it is negative, and closer to red if it is positive. In addition, the yellow-blue information (b) is information indicating whether the color is closer to yellow or blue, and can indicate that the color is closer to blue if it is negative, and closer to yellow if it is positive.

[0057] At this time, the color information may include color information by wavelength.

[0058] For example, the reference color measurement information may include first reference color measurement information to n-th reference color measurement information corresponding to the first wavelength to the n-th wavelength. Additionally, the specific color prediction information may include first specific color prediction information to n-th specific color prediction information corresponding to the first wavelength to the n-th wavelength.

[0059] As another example, the reference color measurement information may include reflectance information corresponding to the color of the reference base to which the reference mixing information is applied.

[0060] At this time, the reflectance information may include wavelength-specific reflectance information.

[0061] For example, the reference reflectance measurement information may include first reference reflectance measurement information to n-th reference reflectance measurement information corresponding to the first wavelength to the n-th wavelength. Additionally, the specific reflectance prediction information may include first specific reflectance prediction information to n-th specific reflectance prediction information corresponding to the first wavelength to the n-th wavelength.

[0062] Figures 2a and 2b illustrate the difference between the reference reflectance measurement information corresponding to the reference base and the specific reflectance measurement information corresponding to the specific base, by wavelength, when the same reference mixing information is applied to the reference base and the specific base.

[0063] Referring to Figure 2a for the wavelength region of 400 nm, it can be seen that when the first reference mixing information is applied to the reference base, a reflectance of 30 is exhibited, whereas when the same first reference mixing information is applied to the first specific base, the reflectance difference is approximately 2.5.

[0064] Also, referring back to FIG. 2a, it can be seen that when the second reference mixing information is applied to the reference base, the reflectance is 45, whereas when the same second reference mixing information is applied to the second specific base, the reflectance difference is approximately 5.

[0065] Meanwhile, referring to Fig. 2b for the wavelength region of 600 nm, it can be seen that when the third reference mixing information is applied to the reference base, the reflectance is 20, whereas when the same third reference mixing information is applied to the third specific base, the reflectance difference is approximately 2.

[0066] Also, referring back to FIG. 2b, it can be seen that when the fourth reference mixing information is applied to the reference base, the reflectance is 60, whereas when the same fourth reference mixing information is applied to the fourth specific base, the reflectance difference is approximately 5.

[0067] In this way, even if the color combination is the same, it can be confirmed that there may be differences in color information (e.g., reflectance) depending on the type of base, and the color may be perceived differently with the naked eye.

[0068] Tables 1 and 2 below list examples of multiple products (bases) with different properties (characteristics). For reference, even if they have the same product name, they are classified as A-BASE (corresponding to the relatively highest concentration), B-BASE, C-BASE, and D-BASE (corresponding to the relatively lowest concentration) depending on the color range to be expressed or the concentration of the raw material that expresses white. The brighter or off-white area has a higher concentration of white and lower concentrations of other colors, so A-BASE, B-BASE, C-BASE, and D-BASE are used in the paint system design in that order. The darker or highly saturated area has a lower concentration of white and higher concentrations of other colors, so D-BASE, C-BASE, B-BASE, and A-BASE are used in the paint system design in that order. Therefore, although there are 40 product names, it can be viewed as actually 83 products (bases).

[0069]

[0070] Number Product Name A-BASEB-BASEC-BASED-BASE1 Forest KS Grade 1 Exterior OOOO2 Forest Neosil-PLUS OOOO3 Forest KS Grade 1 Water Repellent OOOO4 Forest Water Repellent OOOO5 Forest Neosil OOOO6 Forest Ace Exterior OOOO7 Forest Neosil One Coat OO8 Multi-Patterned Paint Base OO9 Forest Intex (Extreme Matte) OO10 Forest Home & Wellbeing OOOO11 Forest Home & Dew Zero OO12 Forest KS Grade 1 Interior OOOO13 Forest Lacquer Topcoat (Matte) OO14 Forest Lacquer Topcoat (Semi-Gloss) OO15 Forest Lacquer Topcoat OO16 Forest Bio OO17 Forest Eco Plus OO18 Forest Silk OO19 Forest Antibacterial OO20 Forest Ace Interior OOOO

[0071]

[0072] Number Product Name A-BASEB-BASEC-BASED-BASE21 Forest Home & Multimel (matte) OO22 Forest Home & Multimel (semi-gloss) OO23 Forest Home & Multimel OO24 Forest Gold for interior use O25 Forest Bio (eggshell) O26 Forest Glossy Plus (exterior use) OOO27 Forest Glossy Plus (matte) OOO28 Forest Glossy Plus (semi-gloss) OOO29 Forest Glossy Plus Rus OOO30 Forest All-in-one (matte) OOO31 Forest All-in-one (semi-gloss) OOO32 Forest All-in-one OOO33 Forest Self-wallpaper (eggshell) O34 Forest Self-veranda (eggshell) O35 Forest Self-steel (eggshell) O36 Forest Self-wood (glossy) O37 Forest Self-condensation prevention O38 Forest Self-tile O39 Forest Home Stain O404A Forest Durable OOO

[0073]

[0074] Figures 3a to 3f illustrate the difference between the reference reflectance measurement information corresponding to the reference base and the specific reflectance measurement information corresponding to the specific base by wavelength when the same reference mixing information is applied to some of the products listed in Tables 1 and 2 as the reference base and the specific base.

[0075] For example, referring to Fig. 3a, when the first reference mixing information is applied to the reference base 'Forest Ace External Use' and the first specific base 'Forest KS Grade 1 External Use', the difference distribution of reflectance for the wavelength region of 500 nm can be known. For example, when the first reference mixing information is applied to 'Forest Ace External Use' and the reflectance measurement information is 20, when the first reference mixing information, which is the same mixing, is applied to 'Forest KS Grade 1 External Use', the reflectance measurement information can be predicted to be approximately 20.

[0076] Also, referring to FIG. 3b, when the first reference mixing information is applied to the reference base 'Forest Ace External Use' and the first specific base 'Forest KS Grade 1 External Use', the difference distribution of reflectance for the wavelength region of 600 nm can be known. For example, when the first reference mixing information is applied to 'Forest Ace External Use' and the reflectance measurement information is 80, when the first reference mixing information, which is the same mixing, is applied to 'Forest KS Grade 1 External Use', the reflectance measurement information can be predicted to be approximately 80.

[0077] Also, referring to FIG. 3c, when the first reference mixing information is applied to the reference base 'Forest Ace External Use' and the first specific base 'Forest KS Grade 1 External Use', the difference distribution of reflectance for the wavelength region of 700 nm can be known. For example, when the first reference mixing information is applied to 'Forest Ace External Use' and the reflectance measurement information is 40, when the first reference mixing information, which is the same mixing, is applied to 'Forest KS Grade 1 External Use', the reflectance measurement information can be predicted to be approximately 40.

[0078] Meanwhile, referring to FIG. 3d, when the second reference mixing information is applied to the reference base 'Forest Ace External' and the second specific base 'Forest Neosil-PLUS', the difference distribution of reflectance in the wavelength region of 500 nm can be known. For example, when the second reference mixing information is applied to 'Forest Ace External' and the reflectance measurement information is 20, when the second reference mixing information, which is the same mixing, is applied to 'Forest Neosil-PLUS', the reflectance measurement information can be predicted to be approximately 17.5.

[0079] Also, referring to FIG. 3e, when the second reference mixing information is applied to the reference base 'Forest Ace External' and the second specific base 'Forest Neosil-PLUS', the difference distribution of reflectance for the wavelength region of 600 nm can be known. For example, when the second reference mixing information is applied to 'Forest Ace External' and the reflectance measurement information is 80, when the second reference mixing information, which is the same mixing, is applied to 'Forest Neosil-PLUS', the reflectance measurement information can be predicted to be approximately 82.5.

[0080] Also, referring to FIG. 3f, when the second reference mixing information is applied to the reference base 'Forest Ace External' and the second specific base 'Forest Neosil-PLUS', the difference distribution of reflectance for the wavelength region of 700 nm can be known. For example, when the second reference mixing information is applied to 'Forest Ace External' and the reflectance measurement information is 40, when the second reference mixing information, which is the same mixing, is applied to 'Forest Neosil-PLUS', the reflectance measurement information can be predicted to be approximately 37.5.

[0081] Through the results shown in FIGS. 3a to 3f, it was confirmed that for the same mixing information, in some cases, similar color information (e.g., reflectance) is provided even if the base is different, while in other cases, dissimilar color information (e.g., reflectance) is provided depending on the base.

[0082] As the type of base changes in this way, there is a problem that the color perceived by the user with the naked eye may not be consistent even if the mixing information is the same. However, this problem can be solved by accurately deriving specific mixing information corresponding to a specific base according to the embodiment disclosed in this document.

[0083] Also, among the products listed in Table 1 and Table 2, the L color space for 'Forest Ace Interior B-BASE' and 'Forest Ace External B-BASE' * value, a * value, b * The differences in the measured values ​​are as shown in Table 3.

[0084]

[0085] Category L * value a * value b * B-BASE95.12-0.333.1 for internal use in the forest B-BASE93.98-0.642.25 for external use Difference 1.140.310.85

[0086]

[0087] As shown in Table 3, even for products without added coloring agents, the Lab value differs depending on the type of product (base), resulting in L * value, a * value, b * It can be seen that differences in measured values ​​occur, and thus, even when mixing the same colorant, the final color may vary depending on the paint system. For reference, "Soopro Ace Interior B-BASE" and "Soopro Ace Exterior B-BASE" are only examples listed for understanding, and those skilled in the art will readily understand that different products have different properties.

[0088] Therefore, without having to go through the process of individually obtaining the results (e.g., specific color measurement information) actually applied to a specific base as specific mixing information applied to a specific base, it may be necessary to accurately predict what the result (e.g., specific color prediction information) will be when the reference mixing information is applied to a specific base, and to convert the reference mixing information based on the predicted result.

[0089] To this end, the color estimation unit (120) according to one embodiment disclosed in this document can output specific color prediction information corresponding to a specific base when the reference mixing information is applied to the specific base as specific mixing information applied to a specific base excluding the reference base. In other words, specific color prediction information corresponding to a specific base can be output without actually applying the reference mixing information to the specific base.

[0090] At this time, the color estimation unit (120) that outputs specific color prediction information may be in a pre-learned state according to the learning process below.

[0091] For example, (1) a process of inputting learning reference color measurement information of a learning reference base to which learning reference mixing information is applied into a color estimation unit (120) so that the color estimation unit (120) outputs learning specific color prediction information corresponding to a learning specific base when the learning reference mixing information is applied to the learning specific base as learning specific mixing information applied to a learning specific base excluding the learning reference base, (2) a process of generating a specific color loss based on the learning specific color prediction information and the corresponding specific color GT (ground truth) information, and (3) a process of updating at least some of the parameters of the color estimation unit (120) using the specific color loss, thereby allowing the color estimation unit (120) to be in a learned state.

[0092] At this time, the learning reference color measurement information may include the first learning reference color measurement information to the nth learning reference color measurement information corresponding to the first wavelength to the nth wavelength, the learning specific color prediction information may include the first learning specific color prediction information to the nth learning specific color prediction information corresponding to the first wavelength to the nth wavelength, and the specific color GT information may include the first specific color GT information to the nth specific color GT information corresponding to the first wavelength to the nth wavelength.

[0093] For example, the color estimation unit (120) can be trained according to Equation 1 below.

[0094]

[0095] [Formula 1]

[0096]

[0097]

[0098] At this time, for the same standard mixing information, x i is the reference color measurement information for the i-th learning at the i-th wavelength corresponding to the reference base, f(x i ) is the specific color prediction information for the i-th learning at the i-th wavelength corresponding to a specific base, y i is the GT information of the i-th specific color at the i-th wavelength corresponding to a specific base, and V may be an error function.

[0099] At this time, f(x i ) can be expressed as in Equation 2 below.

[0100]

[0101] [Formula 2]

[0102]

[0103]

[0104] For example, to find β and β0 to maximize the margin (M), y i and f(x i) can be trained so that the difference is below a threshold. At this time, M = 1 / (||β||).

[0105] For example, the color estimation unit (120) according to one embodiment disclosed in this document may include, but is not limited to, a support vector machine. For example, the color estimation unit (120) may also include a machine learning model other than a support vector machine.

[0106] In addition, the generation unit (130) can generate conversion mixing information corresponding to a specific base by converting specific mixing information based on reference color measurement information and specific color prediction information corresponding to a reference base to which reference mixing information is applied.

[0107] For example, the generation unit (130) may generate transformed mixing information by converting the concentration information of at least a portion of at least one specific mixing color corresponding to the specific mixing information based on the reference color measurement information and the specific color prediction information. For reference, the specific mixing information applied to a specific base to express one specific color information may be a combination of one mixing color (i.e., one colorant) or multiple mixing colors (i.e., multiple colorants).

[0108] At this time, the generation unit (130) can additionally convert the concentration information of a specific base to generate conversion mixing information.

[0109] For example, the error between the transformed color measurement information and the specific color prediction information corresponding to a specific base to which the transformed mixing information is applied may be within a critical error range.

[0110] For example, the generation unit (130) generates (i) L on the Lab color space for the reference base to which the reference mixing information is applied. * Value (Base L) * value), a * Value (based on a) * value), b *Value (Based on b * (ii) L on the Lab color space for a specific base to which the reference mixing information is applied as specific mixing information. * value (specific L * value), a * value (specific a * value), b * value (specific b * The difference between the values ​​can be calculated. That is, the generation unit (130) can calculate the difference between the DL * (ΔL * ), Da * (Δa * ) and Db * (Δb * ) can be calculated.

[0111] And, the generating unit (130) is DL * , Da * and Db * By converting specific mixing information based on the information, the transformed mixing information can be generated.

[0112] FIG. 4 is a flowchart schematically illustrating a color combination conversion method according to one embodiment disclosed in this document.

[0113] Referring to FIG. 4, in step 101, the acquisition unit (110) can acquire reference mixing information applied to the reference base.

[0114] And, in step 103, the color estimation unit (120) can output specific color prediction information corresponding to a specific base when the reference mixing information as specific mixing information applied to a specific base excluding the reference base is applied to the specific base.

[0115] And, in step 105, the generation unit (130) can generate conversion mixing information corresponding to a specific base by converting specific mixing information based on reference color measurement information and specific color prediction information corresponding to a reference base to which reference mixing information is applied.

[0116] Table 4 shows the E in the Lab color space by color group for 'Forest Ace Internal B-BASE' and 'Forest Ace External B-BASE'. * value, L * value, a * value, b * It represents the average of the differences in values.

[0117] For example, if there are 10 colors in the Yellow-Red color group, E in the Lab color space of 'Forest Ace Internal B-BASE' and 'Forest Ace External B-BASE' for each of the 10 colors * value, L * value, a * value, b * The results of calculating the difference in values ​​and calculating the average of 10 difference values ​​are shown in Table 4.

[0118]

[0119] Classification DE * (ΔE * )DL * (ΔL * )Da * (Δa * )Db * (Δb * )Yellow-Red2.882.27-1.101.13Green-Yellow3.132.700.151.24Blue-Green2.792.45-0.800.59Non Chromatic3.422.970.411.62Total3.052.60-0.341.14

[0120]

[0121] As can be seen in Table 4, the Lab values ​​differ depending on the type of product (base).

[0122] On the other hand, Tables 5 to 7 show the average color difference (DE) when the transformation blending information generated by the color blending transformation method according to the embodiment disclosed in this document is applied to a specific base and when the reference blending information is applied to the reference base. * , DE *The results of comparing the cmc) are schematically illustrated.

[0123]

[0124] Distinction A-base B-base Average color difference (DE) * )0.60.66Average color difference (DE) * cmc)0.420.39

[0125]

[0126] Distinction A-base B-base Average color difference (DE) * )0.820.76Average color difference (DE) * cmc)0.610.46

[0127]

[0128] Distinction A-base B-base C-base Average color difference (DE) * )0.630.891.21Average color difference (DE) * cmc)0.420.510.64

[0129]

[0130] For example, referring to Table 5, when the standard mixing information is applied using 'Forest Ace External' as the reference base and the conversion mixing information is applied using 'Forest KS Grade 1 External A-base' and 'Forest KS Grade 1 External B-base' as specific bases, the DE with A-base * and DE * cmc is 0.6 and 0.42, and DE with B-base * and DE * We can see that cmc is close to 0 at 0.66 and 0.39.

[0131] As another example, referring to Table 6, when the standard mixing information is applied with 'Forest Ace External' as the reference base and the conversion mixing information is applied with 'Forest Ace Internal A-base' and 'Forest Ace Internal B-base' as specific bases, the DE with A-base * and DE * cmc is 0.82 and 0.61, and DE with B-base * and DE* We can see that cmc is close to 0 at 0.76 and 0.46.

[0132] As another example, referring to Table 7, when the standard mixing information is applied using 'Forest Ace External' as the reference base, and the conversion mixing information is applied using 'Forest Neosil-PLUS A-base', 'Forest Neosil-PLUS B-base', and 'Forest Neosil-PLUS C-base' as specific bases, the DE with A-base * and DE * cmc is 0.63 and 0.42, and DE with B-base * and DE * cmc is 0.89 and 0.51, and DE with C-base * and DE * We can see that cmc is close to 0 at 1.21 and 0.64.

[0133] In order to visually confirm the effect when the color mixing conversion information generated according to the color mixing conversion method according to the embodiment disclosed in this document is applied to a specific base, a description will be given with reference to FIG. 5.

[0134] Referring to Figure 5, when the reference mixing information is applied to the reference base and the specific base, it can be confirmed that the colors recognized by the naked eye are different, as shown on the left. On the other hand, when the color mixing conversion information generated according to the color mixing conversion method disclosed in the present document is applied to the specific base and the reference mixing information is applied to the reference base, it can be confirmed that the colors recognized by the naked eye are the same, as shown on the right.

[0135] Although all components constituting the embodiments disclosed in this document have been described as being combined or operating in combination as one, the embodiments disclosed in this document are not necessarily limited to such embodiments. That is, within the scope of the purpose of the embodiments disclosed in this document, all of the components may be selectively combined and operated one or more times.

[0136] In addition, terms such as "include," "comprise," or "have" described above, unless specifically stated otherwise, mean that the corresponding component can be included, and therefore should be interpreted to include other components rather than excluding other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiments disclosed in this document belong, unless otherwise defined. Commonly used terms, such as terms defined in a dictionary, should be interpreted to be consistent with the contextual meaning of the relevant technology, and shall not be interpreted in an idealized or overly formal sense, unless explicitly defined in this document.

[0137] The above description is merely an example of the technical idea disclosed in this document, and those skilled in the art to which the embodiments disclosed in this document pertain may make various modifications and variations without departing from the essential characteristics of the embodiments disclosed in this document. Therefore, the embodiments disclosed in this document are not intended to limit the technical idea of ​​the embodiments disclosed in this document, but to explain it, and the scope of the technical idea disclosed in this document is not limited by these embodiments. The scope of protection of the technical idea disclosed in this document should be interpreted by the claims below, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of rights of this document.

Claims

1. A step of obtaining standard mixing information applied to a standard base; A step of outputting specific color prediction information corresponding to the specific base through a color estimation unit as specific mixing information applied to a specific base excluding the above-mentioned reference base when the above-mentioned reference mixing information is applied to the specific base; and A step of generating converted mixing information corresponding to the specific base by converting the specific mixing information based on the reference color measurement information and the specific color prediction information corresponding to the reference base to which the reference mixing information is applied; A color combination transformation method including:

2. In paragraph 1, In the step of generating the above conversion mixing information, A color mixing conversion method characterized in that the conversion mixing information is generated by converting the concentration information of at least a part of at least one specific mixing color corresponding to the specific mixing information based on the reference color measurement information and the specific color prediction information.

3. In paragraph 2, In the step of generating the above conversion mixing information, A color combination conversion method characterized in that the conversion combination information is generated by additionally converting the concentration information of the specific base.

4. In paragraph 1, The above reference color measurement information includes first reference color measurement information to nth reference color measurement information corresponding to the first wavelength to the nth wavelength, A color mixing conversion method, characterized in that the specific color prediction information includes first specific color prediction information to n-th specific color prediction information corresponding to the first wavelength to the n-th wavelength.

5. In paragraph 1, Before the step of outputting the above specific color prediction information, (1) A color mixing conversion method, characterized by further comprising the steps of: (1) a process for inputting learning reference color measurement information of a learning reference base to which learning reference mixing information is applied, into the color estimation unit, and causing the color estimation unit to output learning specific color prediction information corresponding to the learning specific base when the learning reference mixing information is applied to the learning specific base as learning specific mixing information applied to a learning specific base excluding the learning reference base; (2) a process for generating a specific color loss based on the learning specific color prediction information and the specific color GT (ground truth) information corresponding thereto; and (3) a process for updating at least some of the parameters of the color estimation unit using the specific color loss.

6. In paragraph 5, The above learning reference color measurement information includes first learning reference color measurement information to nth learning reference color measurement information corresponding to the first wavelength to the nth wavelength, The above learning specific color prediction information includes first learning specific color prediction information to nth learning specific color prediction information corresponding to the first wavelength to the nth wavelength, A color combination conversion method, characterized in that the specific color GT information includes first specific color GT information to n-th specific color GT information corresponding to the first wavelength to the n-th wavelength.

7. In paragraph 1, A color mixing conversion method, characterized in that the error between the conversion color measurement information corresponding to the specific base to which the conversion mixing information is applied and the specific color prediction information is within a critical error range.

8. An acquisition unit for acquiring standard mixing information applied to a standard base; A color estimation unit that outputs specific color prediction information corresponding to a specific base when the reference mixing information is applied to the specific base as specific mixing information applied to a specific base excluding the above-mentioned reference base; and A color mixing conversion device including a generation unit that generates converted mixing information corresponding to the specific base by converting the specific mixing information based on reference color measurement information corresponding to the reference base to which the reference mixing information is applied and the specific color prediction information.

9. In paragraph 8, The above generating unit, A color mixing conversion device characterized in that it generates the converted mixing information by converting the concentration information of at least a part of at least one specific mixing color corresponding to the specific mixing information based on the reference color measurement information and the specific color prediction information.

10. In paragraph 9, The above generating unit, A color mixing conversion device characterized in that it generates the conversion mixing information by additionally converting the concentration information of the specific base.

11. In paragraph 8, The above reference color measurement information includes first reference color measurement information to nth reference color measurement information corresponding to the first wavelength to the nth wavelength, A color mixing conversion device, characterized in that the specific color prediction information includes first specific color prediction information to n-th specific color prediction information corresponding to the first wavelength to the n-th wavelength.

12. In paragraph 8, The above color estimation unit, A color mixing conversion device characterized in that: the device obtains learning reference color measurement information of a learning reference base to which learning reference mixing information is applied, outputs learning specific color prediction information corresponding to the learning specific base when the learning reference mixing information is applied to the learning specific base as learning specific mixing information applied to a learning specific base excluding the learning reference base, and generates specific color loss based on the learning specific color prediction information and specific color GT (ground truth) information corresponding thereto, and at least some of the parameters of the color estimation unit are updated using the specific color loss.

13. In paragraph 12, The above learning reference color measurement information includes first learning reference color measurement information to nth learning reference color measurement information corresponding to the first wavelength to the nth wavelength, The above learning specific color prediction information includes first learning specific color prediction information to nth learning specific color prediction information corresponding to the first wavelength to the nth wavelength, A color mixing conversion device, characterized in that the specific color GT information includes first specific color GT information to n-th specific color GT information corresponding to the first wavelength to the n-th wavelength.

14. In paragraph 8, A color mixing conversion device, characterized in that the error between the conversion color measurement information corresponding to the specific base to which the conversion mixing information is applied and the specific color prediction information is within a critical error range.

Images