JP2018186422A - Image processing apparatus, image processing method, and image processing program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image processing apparatus, an image processing method, and an image processing program that improve visibility of variable images superimposed on a standardized form.SOLUTION: An image forming apparatus 100 in a variable printing system 10 comprises: a variable printing processing part that acquires common image data representing a common image to be a portion common to a plurality of printed materials, variable image data representing varying images variable in the plurality of printed materials, and attribute data associated with the variable image data, and arranges the varying images in the common image with an arrangement set in advance; a first color correction part that corrects the color of variable image data according to the attribute data; an image analysis part that determines whether a first hue difference that is a difference in first hue being color between the corrected varying images falls within a first range set in advance; and a second color correction part that, in response to the determination that the first hue difference falls within the first range set in advance, corrects at least one of the first hue and a second hue to increase the difference between the first hue and second hue.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an image processing apparatus, an image processing method, and an image processing program, and more particularly to variable printing that extracts information from a database and performs variable printing with different contents one by one.

  In recent years, variable printing, which extracts information from a database and performs variable printing with different contents one by one, is becoming popular. The variable printing is performed by superimposing a fixed form as a background and a variable image automatically generated based on information extracted from a database. In variable printing, the color profiles applied to the color conversion processing of form data for forming a fixed form and variable data for forming a variable image may be different from each other. In this case, there is a problem that the standard form and the variable image are printed with different color tones. For example, Patent Document 1 discloses a color conversion process for variable data representing document data. Whether or not to apply the color profile specified in the above is proposed, and a technique that makes it possible to match the color tone of form data printed and the color tone of variable data has been proposed.

JP 2008-92312 A

  However, sufficient investigation has not been made on the visibility of the variable image superimposed on the fixed form.

  The present invention has been made in view of such a situation, and an object thereof is to provide a technique for improving the visibility of a variable image superimposed on a fixed form.

  An image processing apparatus according to the present invention is associated with common image data representing a common image that is a common part of a plurality of printed materials, variable image data representing a variable image that can be varied in the plurality of printed materials, and the variable image data. And a variable print processing unit that arranges the variable image in the common image in a preset arrangement, and a color that corrects the color of the variable image data according to the attribute data. The color correction unit analyzes the first color that is the color of the corrected variation image and the second color that is the color of the common image, and the difference between the first color and the second color For determining whether or not the first color difference is within a preset first range, and determining that the first color difference is within a preset first range. In response to the first color and the second color. Without even and a second color correction unit for correcting one to increase the difference of the second color and the first color.

  The image processing method of the present invention relates to common image data representing a common image that is a common part of a plurality of printed materials, variable image data representing a variable image that can be varied in the plurality of printed materials, and the variable image data. A variable printing processing step of acquiring the attribute data and arranging the variable image in the common image in a preset arrangement, and correcting the color of the variable image data according to the attribute data Analyzing the color correction step, the first color that is the color of the corrected variation image, and the second color that is the color of the common image, and the difference between the first color and the second color An image analysis step of determining whether or not the first color difference is within a preset first range, and determining that the first color difference is within a preset first range. In response, the first color and the second color At least one of the saturation correction to the and a second color correction process to increase the difference of the second color and the first color.

  The present invention provides an image processing program for controlling an image processing apparatus. The image processing program is linked to common image data representing a common image that is a common part of a plurality of printed materials, variable image data representing a variable image that can vary in the plurality of printed materials, and the variable image data. A variable print processing unit that acquires attribute data and arranges the variable image in the common image in a predetermined arrangement; a first color correction unit that corrects the color of the variable image data according to the attribute data The first color that is the color of the corrected variation image and the second color that is the color of the common image are analyzed, and the first color that is the difference between the first color and the second color. In response to determining that the color difference is within a preset first range and determining that the first color difference is within a preset first range, Of the first color and the second color. Without even to function the image processing apparatus as a second color correction section to increase the difference of the second color and the first color by correcting one.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which improves the visibility of the variable image superimposed on the fixed form can be provided.

It is a block diagram which shows the function structure of the variable printing system 10 which concerns on one Embodiment of this invention. It is a flowchart which shows the content of the variable printing process which concerns on one Embodiment. It is a table | surface which shows the content of the database used for the variable printing process which concerns on one Embodiment. It is explanatory drawing which shows the printing image and color table which are correction | amendment objects of the variable printing process which concerns on one Embodiment. It is a flowchart which shows the content of the printing execution process which concerns on one Embodiment. It is a flowchart which shows the content of the color correction process which concerns on one Embodiment. It is explanatory drawing which shows the content of the color correction process which concerns on one Embodiment in Lab color space. It is explanatory drawing which shows the content of the correction execution process which concerns on one Embodiment. It is explanatory drawing which shows the print image after correction | amendment of the variable printing process which concerns on one Embodiment.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a functional configuration of a variable printing system 10 according to an embodiment of the present invention. The variable printing system 10 includes an image forming apparatus 100 and a personal computer (PC) 200. The image forming apparatus 100 includes a control unit 110, an image reading unit 120, an image forming unit 130, a storage unit 140, and a communication interface unit 150.

  The control unit 110 includes a variable print processing unit 111, an image analysis unit 112, and an image processing unit 113. The image forming unit 130 includes a color conversion processing unit 131 and a halftone processing unit 132. The personal computer 200 is connected to the image forming apparatus 100 using the communication interface unit 150.

  The control unit 110 includes main storage means such as RAM and ROM, and control means such as MPU (Micro Processing Unit) and CPU (Central Processing Unit). The control unit 110 also has controller functions related to various I / O, USB (Universal Serial Bus), bus, and other hardware interfaces, and controls the entire image forming apparatus 100.

  The storage unit 140 is a storage device including a hard disk drive or a flash memory that is a non-temporary recording medium, and stores a control program and data for processing executed by the control unit 110. The storage unit 140 further stores a print target database 141 and a color table database 142.

  FIG. 2 is a flowchart showing the contents of variable printing processing according to an embodiment. FIG. 3 is a table showing the contents of a database used for variable printing processing according to an embodiment. FIG. 4 is an explanatory diagram illustrating a print image VP and a color table formed by variable printing processing according to an embodiment. In the variable printing process according to the present embodiment, the variable printing system 10 displays four variable images A1 to A4 superimposed on the fixed form B as an example.

  The columns of the print target database 141 include division areas, sales / closing stores, recommended products, prices, and evaluations. The divided areas indicate positions for displaying the variable images A1 to A4 superimposed on the fixed form B. Business / Closed indicates whether the restaurant is operating or closed. The recommended product indicates the product name of the product recommended by the restaurant. The price indicates the price of the recommended product.

  The evaluation indicates the evaluation score as a quantitative result collected by a web server (not shown) on the Internet. The variable print processing unit 111 uses the communication interface unit 150 to periodically acquire data representing evaluation from a web server (not shown) and update the print target database 141.

  In the present embodiment, the divided areas are any one of the areas A to D for each record based on the number of display areas (four in this example) of the variable image arranged on the fixed form B and the evaluation score. It is set automatically. Specifically, the variable image with the highest evaluation score is automatically placed in the upper left area A, and the variable image with the lowest evaluation score (not applicable in this example) is automatically placed in the lower right area D. Is set. In this example, the divided areas are automatically set according to the result of layout setting (step S200) described later.

  The print target database 141 stores common image data representing an image of the fixed form B and variable image data representing a variable image. The common image data is image data representing a common image that is a common part of a plurality of printed materials. The variable image data is image data representing a fluctuating image that can fluctuate in a plurality of printed materials. In the present embodiment, the variable printing system 10 automatically generates print data using the common image data and variable image data.

  In step S <b> 100, the user executes a data table creation process on the personal computer 200. In the data table creation process, the user sets each column of the database, and registers each store (restaurant in this example) as a database record. As a result, the print target database 141 is generated. The image forming apparatus 100 periodically accesses a web server (not shown) to synchronize evaluation scores. As a result, the print target database 141 is updated.

  In step S <b> 200, the user executes a layout setting process on the personal computer 200. In the layout setting process, the user selects a fixed form and sets the number and size of variable images to be displayed superimposed on the fixed form.

  In this example, the user selects the fixed form B and sets the four variable images A1 to A4 to be displayed at a predetermined size and position. In the present embodiment, the variable images A1 to A4 are illustrations composed of a plurality of tones (tones) in an achromatic color.

  In step S300, the user executes color determination processing on the personal computer 200. In the color determination process according to the present embodiment, the user sets the background dominant color, which is the dominant color (also referred to as the dominant color) of the fixed form B, as the hue angle (master_H) in the vicinity of R in this example. Dominant color scheme is a method for achieving a unified sense of hue, and is a color scheme that changes the tone (tone) in the same or similar hue.

  In this example, the hue angle (master_H) of the background dominant color is set by the user, but the present invention is not necessarily limited to the case where the user sets the hue angle (master_H) of the background dominant color. The hue angle (master_H) of the background dominant color may be prepared in advance as attribute data according to the image data of the fixed form, or may be calculated from the image data of the fixed form by a known method.

  The color tone is a group of colors that are similar in lightness and saturation. There are pure colors, clear colors, intermediate colors, and achromatic colors. Pure color is a vivid color tone with very high saturation. The clear color includes a clear color obtained by mixing white with a pure color and a dark color obtained by mixing black with a pure color. The intermediate color is a cloudy color formed by adding gray to a pure color. Achromatic colors are unsaturated white, gray and black.

  In step S <b> 400, the user instructs a print execution process on the personal computer 200. The image forming apparatus 100 starts print execution processing in response to a print execution processing instruction from the personal computer 200.

  FIG. 5 is a flowchart showing the contents of the print execution process (step S400) according to the embodiment. In step S410, the variable print processing unit 111 executes a data acquisition process. In the data acquisition process, the variable print processing unit 111 reads the record of each store from the print target database 141 as the store database of the restaurant, and acquires data for use in variable printing.

  In step S420, the variable print processing unit 111 executes a color table storage process. In the color table storage process, the variable print processing unit 111 selects a color table from the color table database 142 (see FIGS. 1 and 4B) based on the evaluation value of each record in the print target database 141. Each record is linked and stored in a memory (not shown). The numerical value of evaluation is attribute data of each record, and is associated with each record.

  Specifically, the variable print processing unit 111 stores the magenta color table Y corresponding to the evaluation 3.5 in association with the record of the store number 001 in a memory (not shown) and stores it in the record of the store number 002. The red color table X corresponding to the evaluation 1.9 is stored in a memory (not shown), and the blue color table Z memory corresponding to the evaluation 4.2 is linked to the record of the store number 003 (see FIG. (Not shown), and the gray color table W corresponding to no evaluation associated with the record of the store number 004 is saved in a memory (not shown).

  In this embodiment, the variable images A1 to A4 are quantitatively set such that the higher the evaluation score, that is, the higher the evaluation, the closer the hue of the dominant color approaches from R to B. On the other hand, since the hue of the dominant color of the fixed form B is set in the vicinity of R, the variable images A1 to A4 are set to stand out in the fixed form B as the evaluation score increases. In FIG. 4, the hatching width is different as the evaluation score is higher.

  In step S430, the variable print processing unit 111 performs color correction processing on the variable images A1 to A4 as necessary. The color correction processing is necessary to determine whether or not the variable color images A1 to A4 after the color correction processing are to be visually embedded in the set standard color B of the dominant color and to avoid such embedding. Accordingly, this is a process of adjusting the hues of the variable images A1 to A4.

  FIG. 6 is a flowchart showing the content of the color correction process according to the embodiment. In step S431, the variable print processing unit 111 executes color conversion processing. In the color conversion process, the variable print processing unit 111 converts RGB image data that is image data of the fixed form B and the variable images A1 to A4 in the RGB color space into Lab image data that is image data in the Lab color space.

  FIG. 7 is an explanatory diagram showing the contents of color correction processing according to an embodiment in the Lab color space. FIG. 7A shows the standard form B and the image data of the variable images A1 to A4 in the Lab color space before the color correction process. FIG. 7B shows the standard form B after the color correction processing and the image data of the variable images A1 to A4 in the Lab color space. Unlike the RGB and CMYK color spaces, the Lab color space is designed to approximate human vision. Thereby, the variable printing system 10 can facilitate color correction in consideration of human vision.

  In step S432, the variable print processing unit 111 stores a preset hue angle of the background dominant color (in the vicinity of master_H: R) in a memory (not shown). The background dominant color is the dominant color of the standard form B.

  In step S433, the variable print processing unit 111 executes an area selection process. In the area selection process, the variable print processing unit 111 sequentially selects the variable images A1 to A4. In this example, it is assumed that the variable image A3 (region C) is selected.

  In step S434, the variable print processing unit 111 stores the hue angle (area_H (C)) of the selected region dominant color in a memory (not shown). The selected area dominant color is the dominant color of the selected variable image (in this example, variable image A3 (area C)).

  In this example, the hue angle (master_H) of the background dominant color is the hue angle (corresponding to the hue angle θ in FIG. 7A) with the R axis as the reference axis. The variable image A1 (region A) has a hue angle (area_H (A)). The variable image A2 (region B) has a hue angle (area_H (B)). The variable image A3 (region C) has a hue angle (area_H (C)). The variable image A4 (area D) has no hue because it is an achromatic color.

  In this example, the hue angle of the variable image is determined according to the color table selected from the color table database 142 based on the evaluation score, but may be set by another method. Specifically, for example, it may be calculated by a known method from image data of a variable image selected based on the score of evaluation.

  FIG. 8 is an explanatory diagram showing the content of the correction execution process (step S435) according to an embodiment. As shown in FIG. 8A, in step S435, the control unit 110 executes a correction execution process. In step S4351, the image analysis unit 112 executes a first hue difference calculation process. In the first hue difference calculation process, the image analysis unit 112 calculates a hue difference dH that is the difference between the hue angle (area_H) of the selected region dominant color and the hue angle (master_H) of the background dominant color. In this example, the selected region dominant color corresponds to the first color, the background dominant color corresponds to the second color, and the hue difference dH corresponds to the first color difference.

  In this example, since the variable image A3 (region C) is selected, the image analysis unit 112 uses the image data of the variable image A3 (region C) as variable image data and the fixed form B as common image data. The image data is analyzed, and the hue difference dH between the hue angle (area_H (c)) of the selected region dominant color and the hue angle (master_H) of the background dominant color is calculated.

  In step S4352, the image analysis unit 112 determines whether or not the hue difference dH is smaller than a preset threshold value Th. If the hue difference dH is smaller than the threshold value Th, the image analysis unit 112 advances the process to step S4353. If the hue difference dH is equal to or greater than the threshold value Th, the image analysis unit 112 advances the process to step S436 (see FIG. 6). In this example, as can be seen from FIG. 7A, since the hue difference dH is smaller than the threshold Th (also referred to as the first range), the process proceeds to step S4353.

  In step S4353, the image processing unit 113 functions as a first color correction unit and executes a first image correction process. In the first image correction process, the image processing unit 113 adjusts the hue in a direction in which the hue of the variable image A3 (region C) is away from the hue angle (master_H) of the background dominant color in the Lab color space (FIG. 7B). reference). Thereby, the variable image A3 (area C) has a hue angle (C_area_H (C)).

  In this embodiment, the image processing unit 113 adjusts the hue of the variable image A3 so that the hue of the variable image A3 is away from the hue angle of the background dominant color, but conversely adjusts the hue of the background dominant color. You may make it do, and you may adjust both hues. As described above, the image processing unit 113 only needs to be configured to adjust (correct) at least one of the hue of the variable image and the hue of the background dominant color and release the two.

  In addition, when the hue angle (C_area_H (C)) of the corrected variable image A3 approaches one of the other variable images A1 and A2, the variable image (on the side close to the hue angle of the corrected variable image A3) ( For example, the hue angle of the variable image A2) may be corrected. In this way, the variable images A1 to A4 can maintain the feature that the higher the evaluation score is, the more prominent the fixed form B is, even after correction.

  In step S4354, the image analysis unit 112 executes a second hue difference calculation process. In the second hue difference calculation process, the image analysis unit 112 calculates a hue difference that is a difference between the hue angle (data_dH) of the image data of the variable image and the hue angle (master_H) of the background dominant color. Since the variable images A1 to A4 are configured as images of a single hue, in this example, the variable images A1 to A4 have a hue difference sufficiently away from the hue angle (master_H) of the background dominant color.

  In step S4355, if the hue difference (data_dH) is smaller than the threshold value Th, the image analysis unit 112 advances the process to step S4356. If the hue difference (data_dH) is equal to or larger than the threshold value Th, the process proceeds to step S436. Proceed to (see FIG. 6). In this example, since the hue difference (data_dH) is greater than or equal to the threshold Th, the process proceeds to step S436 (see FIG. 6). In this example, the first range and the second range are set to the same hue angle range.

  When the variable image is not a single-hue image, the image analysis unit 112 performs the hue of the image area (for each of a plurality of image areas that are different from each other in the hue constituting the variable image after the first image correction process). It is determined whether or not the hue difference (data_dH) between the hue angle (data_H) of data_background) and the background dominant color (master_H) is smaller than the threshold Th (that is, within the second range).

  In step S4356, the image processing unit 113 functions as a second color correction unit, and executes a second image correction process on an image region whose hue difference (data_dH) is smaller than the threshold Th. In the second image correction process, the image processing unit 113 decreases the correction amount (in this example, the adjustment amount of the hue angle) as the distance from the dominant color arrangement of the variable image increases in order to maintain the dominant color arrangement. The hue difference (data_dH) is also called a second color difference.

  Specifically, the image processing unit 113 can correct the hue using Expression F shown in FIG. In Formula F, data_dH ′, data_H, and area_mH are the hue angle of the image area after correction, the hue angle of the image area before correction, and the hue angle of the dominant color of the image area before correction.

  In step S436 (see FIG. 6), the variable print processing unit 111 executes color conversion processing. In the color conversion process, the variable print processing unit 111 includes image data of the standard form B (Lab image data), image data of the variable images A1 to A3 (Lab image data), and image data of the variable image A4 after color correction. (Lab image data) is converted into RGB image data.

  In step S437, the variable print processing unit 111 determines whether processing has been performed for all selected areas. The variable print processing unit 111 advances the process to step S440 (see FIG. 5) when all the selected areas have been processed, and performs the process when an unprocessed variable image area remains. Return to S433.

  In step S440, the color conversion processing unit 131 executes color conversion processing. In the color conversion process, RGB image data is color-converted to CMYK image data. The CMYK image data is a color space that can be reproduced with the color material used by the image forming unit 130.

  In step S450, the halftone processing unit 132 performs halftone processing on the CMYK image data and outputs halftone data. In step S460, the image forming unit 130 executes image output processing (image formation on a print medium) based on the halftone data.

  FIG. 9 is an explanatory diagram illustrating a print image VPa after correction in the variable printing process according to an embodiment. The corrected print image VPa is different from the uncorrected print image VP in that the variable image A3 is corrected to be a variable image A3a. The variable image A3a is suppressed from being buried in the fixed form B of the variable image A3a superimposed on the fixed form B by correction.

  Thus, according to the variable printing system 10 according to the embodiment, the hue can be corrected based on the attribute data of the variable image. Furthermore, the variable printing system 10 prevents the variable image superimposed on the fixed form from being buried in the fixed form due to the correction of the hue of the variable image, and improves the visibility of the variable image superimposed on the fixed form. Can be made.

  The present invention can be implemented not only in the above embodiments but also in the following modifications.

  Modification 1: In the above embodiment, the variable image is an illustration composed of a plurality of tones (tones) in an achromatic color, but the variable image is not limited to an achromatic illustration. Specifically, a monochrome photograph of a store or a product may be used.

  Furthermore, the variable image may be a variable image including a chromatic photo or illustration. In such a case, it is preferable that the variable printing system performs color conversion for converting the hue of the variable image into a dominant color set in advance. Specifically, for example, the variable printing system analyzes the hue of a variable image to be subjected to color correction, reduces the relative variation of the hue angle in the variable image, and controls the hue color with a preset hue angle. Can be converted to

  Modification 2: In the above embodiment, the variable printing system corrects the hue based on the attribute data of the variable image, but it is not always necessary to correct the hue. Specifically, for example, at least one of saturation and brightness may be corrected based on variable image attribute data. In this case, the first color difference and the second color difference are at least one difference between saturation and lightness, and the color table changes at least one of saturation and lightness quantitatively according to the score of evaluation. Can be configured.

  In such a configuration, the variable printing system adjusts at least one of hue, saturation, and brightness to suppress burying in the fixed form and improve the visibility of the variable image superimposed on the fixed form. Can do. However, in the case of correcting the hue, a remarkable effect can be achieved when the image data is colored by the dominant color coloring technique. On the other hand, however, when the color tone (tone) is corrected, a remarkable effect can be obtained when the image data is color-coded by the dominant tone color scheme technique.

  Modification 3: In the above embodiment, the present invention is applied to a variable printing system. However, an image processing apparatus and an image processing method for extracting variable information from a database or the like and performing variable image processing with different contents one by one, It can also be applied to an image processing program.

DESCRIPTION OF SYMBOLS 10 Variable printing system 100 Image forming apparatus 200 Personal computer 110 Control part 111 Variable printing process part 112 Image analysis part 113 Image processing part 120 Image reading part 130 Image forming part 131 Color conversion process part 132 Halftone process part 140 Storage part 141 Printing Target database 142 Color table database 150 Communication interface unit

Claims (8)

Common image data representing a common image that is a common part of a plurality of printed materials, variable image data representing a variable image that can vary in the plurality of printed materials, and attribute data associated with the variable image data are acquired. A variable print processing unit that arranges the variation image in the common image in a preset arrangement;
A first color correction unit that corrects the color of the variable image data according to the attribute data;
The first color that is the color of the corrected variation image and the second color that is the color of the common image are analyzed, and the first color that is the difference between the first color and the second color. An image analysis unit for determining whether or not the difference is within a preset first range;
In response to determining that the first color difference is within a preset first range, at least one of the first color and the second color is corrected to correct the first color and the first color. A second color correction unit that increases the difference between the two colors;
An image processing apparatus comprising: The image processing apparatus according to claim 1,
The image analysis unit uses a difference in hue angle between the first color and the second color as a difference between the first color and the second color,
The second color correction unit is an image processing device that corrects the first color. The image processing apparatus according to claim 2,
The attribute data is quantitative data,
The first color correction unit is an image processing apparatus that quantitatively adjusts a hue angle of the first color based on the attribute data. The image processing apparatus according to claim 2 or 3,
The common image data and the variation image are both colored based on the dominant color,
The image processing apparatus, wherein the hue angle is a hue angle of the dominant color. The image processing apparatus according to claim 4,
The variation image has a plurality of image regions having different hues from each other,
The image analysis unit, after performing the correction to change the hue angle of the dominant color of the first color, a second color difference that is a difference from the second color for each of the plurality of image regions. Determine whether it is within the preset second range,
The image processing apparatus, wherein the second color correction unit adjusts a hue angle for each of the plurality of image areas in response to determining that the second color difference is within a preset second range. The image processing apparatus according to claim 5,
The second color correction unit is configured to perform image processing that decreases a hue angle adjustment amount of the image area as a difference between the plurality of hue angles of the plurality of image areas and the hue angle of the dominant color of the first color increases. apparatus. Common image data representing a common image that is a common part of a plurality of printed materials, variable image data representing a variable image that can vary in the plurality of printed materials, and attribute data associated with the variable image data are acquired. A variable print processing step of arranging the variation image in the common image in a preset arrangement;
A first color correction step of correcting the color of the variable image data according to the attribute data;
The first color that is the color of the corrected variation image and the second color that is the color of the common image are analyzed, and the first color that is the difference between the first color and the second color. An image analysis step of determining whether the difference is within a preset first range;
In response to determining that the first color difference is within a preset first range, at least one of the first color and the second color is corrected to correct the first color and the first color. A second color correction step for increasing the difference between the two colors;
An image processing method comprising: An image processing program for controlling an image processing apparatus,
Common image data representing a common image that is a common part of a plurality of printed materials, variable image data representing a variable image that can vary in the plurality of printed materials, and attribute data associated with the variable image data are acquired. A variable print processing unit that arranges the variation image in the common image in a preset arrangement;
A first color correction unit for correcting the color of the variable image data according to the attribute data;
The first color that is the color of the corrected variation image and the second color that is the color of the common image are analyzed, and the first color that is the difference between the first color and the second color. In response to determining that the difference is within a preset first range, and determining that the first color difference is within a preset first range, An image processing program that causes the image processing apparatus to function as a second color correction unit that corrects at least one of the first color and the second color to increase a difference between the first color and the second color.