JP2015072123A - Device for generating color evaluation result image, program for generating color evaluation result image, and device for displaying color evaluation results - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for generating a color evaluation result image, a program for generating a color evaluation result image, and a device for displaying color evaluation results which can intelligibly display association between color examples and evaluation results for respective color examples.SOLUTION: A smartphone 40 receives an image of an evaluation chart which forms color examples having predetermined color information, and generates and outputs composite image signals that superimpose color differences ΔE between the color information of color examples acquired from the image of the evaluation chart and color information predetermined for color examples, on display positions of respective color examples of the evaluation chart.

Description

  The present invention relates to a color evaluation result image generation device, a color evaluation result image generation program, and a color evaluation result display device.

  Japanese Patent Application Laid-Open No. 2004-228561 is a color evaluation apparatus that compares and evaluates output results relating to colors for a first image output apparatus and a second image output apparatus, and outputs a color chart including N evaluation colors. Image data providing means for outputting the first color chart and the second color chart by providing the color chart image data to the first image output device and the second image output device, respectively. For the first color chart and the second color chart, the color measurement means for measuring the output result of each evaluation color is compared with the measurement result obtained by the color measurement means with the selection criterion determined by the operator's instruction, and the first color Specific color selection means for selecting M (1 <M <N) evaluation colors that match the selection criteria from the output results of N evaluation colors on the chart as specific colors, and at least Color difference calculation means for comparing the output result on the first color chart and the output result on the second color chart for the M specific colors and calculating the color difference between the two as a numerical value, and the M specific colors There is disclosed a color evaluation apparatus comprising: color difference statistical means for performing statistical processing on the color difference obtained from the above; and evaluation result presentation means for presenting the result of statistical processing together with information indicating a selection criterion.

  In Patent Document 2, a specifying step for specifying a color determined by the chromaticity difference obtained from the first value and the second value relating to the spectral reflectance characteristic, and the color specified in the specifying step are displayed as a graphical object. There is disclosed a display method comprising a display step.

JP-A-2005-009005 JP 2007-205804 A

  Compared to displaying the evaluation result for the color sample regardless of the actual display position of the color sample, the color evaluation result image generation that can display the correspondence between the color sample and the evaluation result for the color sample in an easy-to-understand manner It is an object to provide a device, a color evaluation result image generation program, and a color evaluation result display device.

  In order to achieve the above object, the invention of the color evaluation result image generating apparatus according to claim 1 includes: a receiving unit that receives an image of a color evaluation sheet on which a color sample having predetermined color information is formed; A composite image signal obtained by superimposing information representing a difference between the color information of the color sample obtained from the image of the color evaluation sheet received by the means and the predetermined color information on the display position of the color sample. Generating means for generating; and output means for outputting the composite image signal generated by the generating means.

  According to a second aspect of the present invention, when the generating unit receives the image of the color evaluation sheet by the receiving unit, the reference point for aligning the marker displayed on the color evaluation sheet and the color of the color sample A composite image signal is generated by superimposing an acquisition region for acquiring information on the image of the color evaluation sheet.

  According to a third aspect of the present invention, the accepting unit accepts the image of the color evaluation sheet as a moving image, and the generation unit includes color information of the color sample according to a change in the image of the color evaluation sheet. A composite image signal is generated by superimposing information representing a difference from the predetermined color information on the display position of the color sample.

  According to a fourth aspect of the present invention, the information indicating the difference is information indicated by at least one of a color, a pattern, a character, and a shape.

  The invention of the color evaluation result image generation program according to claim 5 causes a computer to function as each means constituting the color evaluation result image generation apparatus according to any one of claims 1 to 4.

  The invention of a color evaluation result display device according to claim 6 is a photographing means for photographing a color evaluation sheet, the color evaluation result image generating device according to any one of claims 1 to 4, and the color. Display means for displaying the composite image signal output from the evaluation result image generation device.

  According to the first, fifth, and sixth aspects of the invention, the color sample and the evaluation result for the color sample are associated with each other as compared with the case where the evaluation result for the color sample is displayed regardless of the actual display position of the color sample. Can be displayed in an easy-to-understand manner.

  According to the second aspect of the present invention, the color information of the color sample can be easily acquired as compared with the case where the reference point and the acquisition region are not displayed superimposed on the image of the color evaluation sheet. Have.

  According to the invention of claim 3, the color sample and the evaluation result for the color sample are compared with the case where the display position of the information representing the difference from the color information is not changed according to the change of the image of the color evaluation sheet. There is an effect that the correspondence can be displayed more easily.

  According to the fourth aspect of the present invention, the correspondence between the color sample and the evaluation result for the color sample can be displayed in an easy-to-understand manner as compared with the case where the method of expressing the information representing the difference from the color information is fixed. It has the effect of being able to.

It is a block diagram which shows the structure of a color evaluation system. It is explanatory drawing which shows an example of the chart for evaluation. It is a functional block diagram which shows the functional structure of the smart phone which concerns on this embodiment. It is a block diagram which shows the principal part structure of the electric system of the smart phone which concerns on this embodiment. It is a flowchart which shows the flow of a process of the color evaluation result image generation program which concerns on this embodiment. It is a schematic diagram used for the description regarding the acquisition area | region of a reference | standard point and color information. It is a schematic diagram which shows the display method of an evaluation result. It is a schematic diagram at the time of displaying an evaluation result according to a time series. It is a schematic diagram at the time of displaying an evaluation result according to the display position of the chart for evaluation.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is provided to the component and process which an effect | action and a function bear the same function through all the drawings, and the overlapping description may be suitably omitted.

  FIG. 1 shows a configuration example of the color evaluation system 10.

  As shown in the figure, a color evaluation system 10 includes, for example, a color printer 20 (hereinafter simply referred to as a printer 20) as an image forming apparatus, an evaluation chart 30 formed by the printer 20, and a smartphone as a mobile terminal device. 40 is comprised.

  For example, the printer 20 suppresses a difference between the display color of an image instructed from a personal computer (not shown) connected to a communication line (not shown) and the display color of an image actually formed on a recording medium such as paper. An evaluation chart 30 is formed on the recording medium as necessary.

  The evaluation chart 30 is used for evaluating the display color of the image formed by the printer 20 and correcting the display color of the image. In the case of this embodiment, the evaluation chart 30 is photographed by the smartphone 40, and color information that is information that uniquely represents the display color of the color sample obtained from the image of the evaluation chart 30 on the screen of the smartphone 40, and a printer By displaying the difference between the color information of the color sample of the evaluation chart 30 that the 20 is to form on the recording medium, that is, the reference color value that is the color information that the color sample of the evaluation chart 30 originally has, the printer The image color formed by 20 is evaluated.

  Note that the image forming apparatus is not limited to the printer 20, for example, a copying machine, a facsimile machine, a multifunction machine in which these apparatuses are integrated, a device for forming a color image on a recording medium such as paper, and a display or the like. It may be an apparatus that forms a color image on a display medium such as a liquid crystal.

  The mobile terminal device is not limited to the smartphone 40, and may be any device having a photographing function and a display function for displaying a photographed image, such as a notebook personal computer, a tablet personal computer, a digital camera, and a video camera.

  FIG. 2 is a diagram showing an example of the evaluation chart 30. The evaluation chart 30 is, for example, a color evaluation image for each of cyan C, magenta M, yellow Y, and black K, which are display colors corresponding to the toner colors used when the printer 20 forms an image, and for evaluation on the smartphone 40. It includes a marker 301 that serves as a reference when the chart 30 is photographed.

  The color evaluation image is arranged, for example, so that the density of the display color gradually increases within the same color. For example, in the color evaluation image of cyan C, the density of the color evaluation image block 1C is the lowest, and for color evaluation. Arranged so that the density of cyan C becomes higher as the image block 2C,..., The color evaluation image block (N-1) C progresses, and the density of cyan C in the color evaluation image block NC becomes the highest. . Note that the value of N is an integer predetermined for each type of printer 20.

  Similarly, for magenta M, yellow Y, and black K, color evaluation image blocks (1M, 2M,..., NM), (1Y, 2Y,..., NY), (1K, 2K,..., NK) are arranged.

  Here, each color evaluation image block of each display color is referred to as a color sample, and the color reproduction of the printer 20 is evaluated by evaluating whether the specified display color is formed on the recording medium with the specified density for each color sample. Sex is evaluated. The arrangement of the color samples in the evaluation chart 30 is not particularly limited, and it is not necessary that the color samples are arranged in the order of density for each display color as in this embodiment, and the shape of the color sample is also limited to a square. However, other shapes such as a circle may be used.

  On the other hand, the marker 301 is, for example, a mark formed at the end of the surface on which the color sample of the evaluation chart 30 is displayed. In the present embodiment, the marker 301 is represented as an arrow graphic, for example. The shape is not particularly limited, and may be a figure other than an arrow. There is no restriction on the display color of the marker 301.

  Next, the configuration of the smartphone 40 that photographs the evaluation chart 30 and evaluates the display color of the image formed by the printer 20 will be described.

  FIG. 3 is a functional block diagram showing a functional configuration of the smartphone 40.

The smartphone 40 includes an imaging unit 401 that captures the evaluation chart 30, a reception unit 402 that receives captured images and instructions from the user, an RGB value acquisition unit 403 that acquires RGB values from the captured images, and L ^* an L ^* a ^* b ^* conversion unit 404 for converting to a color value of the a ^* b ^* color space, and a color difference calculation unit 405 for calculating the color difference between the color value corresponding to the color information of the photographed image and the reference color value. An object generation unit 406 that generates an object representing a color difference, a synthesis unit 407 that combines a captured image and an object that represents a color difference, an output unit 408 that outputs the combined image signal to a display medium, and a display that displays the combined image signal Unit 409, an operation unit 410 that provides a user with an instruction means to the smartphone 40, a communication unit 411 that performs data communication with an external device (not shown), And a storage unit 412 for storing image data and the like.

  The photographing unit 401 photographs the evaluation chart 30 formed by the printer 20 and converts it into an image signal.

  The accepting unit 402 accepts an image signal of the evaluation chart 30 photographed by the photographing unit 401 and accepts an instruction to acquire color information of the color sample of the evaluation chart 30 from the user via the operation unit 410.

  The RGB value acquisition unit 403 first acquires a color sample image signal corresponding to the position of each color sample from the image signal of the evaluation chart 30 when the color information acquisition instruction is received. Then, based on this color sample image signal, the display color of the color sample is decomposed into component colors in the red R, green G, and blue B color spaces, and RGB values are acquired.

The L ^* a ^* b ^* conversion unit 404 converts the RGB value acquired by the RGB value acquisition unit 403 into a color value (hereinafter referred to as an actual measurement color value) in the L ^* a ^* b ^* color space. The L ^* a ^* b ^* color space is a color space defined by components related to lightness L ^* and components a ^* and b ^* related to hue and saturation, and is a CIE (Commission Internationale de l'Eclairage: International (Lighting Committee) 1976 recommended color system.

The reason why the RGB value acquired by the RGB value acquisition unit 403 is converted to the color value of the L ^* a ^* b ^* color space is that the color value of the L ^* a ^* b ^* color space depends on the individual device such as the smartphone 40 This is because the display color is compared with higher accuracy because the value is not set.

Note that the RGB value conversion destination color space acquired by the RGB value acquisition unit 403 is not limited to the L ^* a ^* b ^* color space, but a color space in which the influence of individual devices on the display color is eliminated, such as an XYZ color space. It may be converted to other color spaces.

The color difference calculation unit 405 reads the reference color values corresponding to each color sample of the evaluation chart 30 from the storage unit 412, and calculates the color difference ΔE between the actually measured color value and the reference color value corresponding to the color sample as a color. Calculate for each sample. Specifically, the color difference ΔE between the measured color value of each color sample and the reference color value corresponding to the color sample is expressed as a point in the L ^* a ^* b ^* color space represented by the measured color value. , Represented by a distance from a point in the L ^* a ^* b ^* color space represented by a reference color value.

Note that the reference color values corresponding to the color samples are stored in advance in the storage unit 412 as values expressed in the color space of the conversion destination in the L ^* a ^* b ^* conversion unit 404. For example, in the case of the present embodiment, the reference color value is represented as a color value including L ^* , a ^* , and b ^* .

  The object generation unit 406 generates the color difference ΔE obtained for each color sample by the color difference calculation unit 405 as an object according to a predetermined expression method. As types of objects representing the color difference ΔE, for example, colors, patterns, characters, shapes, and the like are used. Hereinafter, an object representing the color difference ΔE is referred to as a color difference object.

  When “color” is set as the color difference object, for example, when the value of the color difference ΔE is 0, it is represented by green G, when it exceeds 0 and less than X, it is represented by yellow Y, and when it is greater than or equal to value X, it is represented by red R. To do.

  Further, when “pattern” is set as the color difference object, for example, when the value of the color difference ΔE is 0, there is no pattern, when it exceeds 0 and less than the value X, it is represented by a dot pattern, and when it is greater than or equal to the value X, it is represented by a lattice pattern. Like that.

  Further, when “character” is set as the color difference object, for example, the value of the color difference ΔE may be expressed as a number as it is, or may be expressed by a symbol such as “*” or “#” depending on the magnitude of the color difference ΔE. May be.

  Further, when “shape” is set as the color difference object, for example, the value of the color difference ΔE is represented as a bar graph, and when the value of the color difference ΔE is less than a predetermined threshold, the color difference ΔE is a predetermined threshold. If the value of the color difference ΔE is greater than or equal to a predetermined threshold value, a sphere meaning that the color difference ΔE is less than or equal to a predetermined threshold value, or a triangular pyramid that indicates that the color difference ΔE is not less than the predetermined threshold value May be.

  Further, a combination of colors, patterns, characters, shapes, and the like may be used as color difference objects.

  The combining unit 407 superimposes the color difference objects corresponding to the color samples generated by the object generating unit 406 on the display positions of the color samples of the evaluation chart 30 received by the image receiving unit 402, and the evaluation chart 30. A composite image signal obtained by combining the color difference object is generated.

  The output unit 408 outputs the combined image signal generated by the combining unit 407 to the display unit 409.

  The display unit 409 converts the combined image signal output from the output unit 408 into an image, and displays an image in which the color difference object corresponding to each color sample is combined at each display position of the color sample of the evaluation chart 30 with the smartphone. The image is displayed on a display medium such as a liquid crystal display incorporated in the display 40.

  The operation unit 410 includes, for example, a touch panel disposed on a display medium such as a liquid crystal display and hardware keys such as a power button. For example, a power on / off instruction of the smartphone 40, software displayed on the liquid crystal display, and the like. The reception unit 402 is notified of pressing of the wear button, an instruction to scroll the screen, and the like.

  The communication unit 411 is an interface for performing data communication with other external devices such as the smartphone 40 and the printer 20 connected to a communication line (not shown), and is connected to a communication line (not shown) by wire or wireless. The

  The storage unit 412 stores various data referred to by the functional units of the imaging unit 401 to the communication unit 411 and a program for controlling the smartphone 40, and each functional unit of the imaging unit 401 to the communication unit 411 performs processing. A storage area for temporarily storing data necessary for implementing the above is provided.

  Note that the reception unit 402 of the present embodiment receives the image signal of the evaluation chart 30 captured by the imaging unit 401, but an external device having a shooting function connected to a communication line (not shown), for example, other You may make it receive the image signal of the chart 30 for evaluation image | photographed with the smart phone 40, the digital camera, the tablet terminal, etc. via the communication part 411. FIG.

  Further, the output unit 408 of the present embodiment outputs the combined image signal generated by the combining unit 407 to the display unit 409, but an external device having a display function connected to a communication line (not shown), for example, other The synthesized image signal generated by the synthesizing unit 407 may be output to the smartphone 40, the display, or the like.

  FIG. 4 is a block diagram illustrating the connection of the electrical system between the main components of the smartphone 40 according to the present embodiment.

  The control unit of the smartphone 40 is configured as a computer 50, for example. The computer 50 includes a central processing unit (CPU) 501, a read only memory (ROM) 502, a random access memory (RAM) 503, a non-volatile memory 504, and an input / output interface (I / O) 505 via a bus 506. A camera controller 62, a display controller 64, a touch panel 66, and a communication line I / F 68 are connected to the I / O 505. A camera module 61 is connected to the camera controller 62, and a liquid crystal display 63 is connected to the display controller 64.

  The camera module 61 in the present embodiment is mounted with a CMOS camera module as an example, but the type of the image sensor is not limited, and may be a CCD camera module, for example.

  Further, the camera controller 62 controls the camera module 61 in accordance with an instruction from the computer 50, and the image signal such as the evaluation chart 30 photographed by the camera module 61 according to a procedure determined in advance with the computer 50. Send to computer 50.

  The display controller 64 receives the image signal transmitted from the computer 50 and various instructions related to image display, and displays the image signal on the liquid crystal display 63 in accordance with the instruction from the computer 50. In the present embodiment, the liquid crystal display 63 is connected to the display controller 64 as a display medium. However, the display medium is not limited to this, and for example, organic electroluminescence (organic EL) or the like may be used. .

  The communication line I / F 68 is connected to a communication line (not shown), and performs data communication with other external devices such as a smartphone 40, a digital camera, a tablet terminal, and a display (not shown) connected to the communication line. Interface, whether wired or wireless.

  The processing in the smartphone 40 configured as described above is realized by a software configuration using the computer 50 by executing a program. Below, the effect | action of the smart phone 40 at the time of performing the color evaluation result image generation process which concerns on this embodiment is demonstrated.

  FIG. 5 is a flowchart showing the flow of processing of the color evaluation result image generation program executed by the CPU 501 of the computer 50 built in the smartphone 40 according to the present embodiment. The program is stored in advance in a predetermined area of the ROM 502, and is executed by the CPU 501 when the CPU 501 receives an instruction to start the program, for example.

  Note that the color evaluation result image generation program is not limited to a form preinstalled in the ROM 502, but is provided in a state of being stored in a computer-readable recording medium such as a CD-ROM or a memory card, or wired Alternatively, a form or the like distributed via wireless communication means may be applied.

  First, in step S100, an image acquisition instruction is transmitted to the camera controller 62, and the image of the evaluation chart 30 acquired by the camera module 61 is acquired from the camera controller 62 as an image signal. Then, the acquired image signal is transmitted to the display controller 64 together with an image display instruction, whereby the image of the evaluation chart 30 photographed by the camera module 61 is displayed on the liquid crystal display 63.

  The image acquired by the camera module 61 may be either a still image or a moving image, but the camera module 61 in this embodiment is assumed to capture an image as a moving image.

  By the way, there are cases where several patterns are prepared for the evaluation chart 30 formed by the printer 20 in consideration of the color reproduction characteristics of the printer 20 and the like. In any of the evaluation charts 30, the number of color samples and the color samples are provided. The arrangement position of is determined in advance.

  Therefore, in step S105, the user of the smartphone 40 can obtain the color information of each color sample of the evaluation chart 30 according to the type of the evaluation chart 30 displayed on the liquid crystal display 63. The auxiliary display image data indicating the number of color samples of the evaluation chart 30 and the arrangement position of the color samples stored in advance in a predetermined area of the memory 504 is read, and the auxiliary display image data and auxiliary data are displayed to the display controller 64. A display start instruction is transmitted, and control is performed so that an auxiliary display image for supporting color information acquisition of the color sample is superimposed on the image of the evaluation chart 30.

  FIG. 6 shows this state. In order to simplify the following description, the evaluation chart 30 is described as including the cyan C color samples 1C, 2C, and 3C having three types of density. For example, the evaluation chart 30 illustrated in FIG. Even when the chart 30 is used, the same processing as that in the present description is applied.

  In the present embodiment, for example, a reference point 302 and an acquisition area 303 are displayed as auxiliary display images of the evaluation chart 30.

  The reference point 302 represents a mark serving as a reference when the evaluation chart 30 is photographed, and the acquisition area 303 indicates which part of the photographed evaluation chart 30 is to be acquired. This represents a range, and the same number of acquisition areas 303 as the number of color samples in the evaluation chart 30 are displayed, whereby the color information of each color sample is acquired.

  The user of the smartphone 40 whose auxiliary display image is displayed on the liquid crystal display 63 moves and positions the smartphone 40 so that the reference point 302 overlaps the tip of the arrow of the marker 301 of the evaluation chart 30. For example, fine adjustment such as adjustment of zoom magnification is performed so that the acquisition area 303 is displayed on the images of the color samples 1C, 2C, and 3C of the evaluation chart 30, and preparation for acquiring color information of the color sample is performed.

  Note that the selection of the type of the evaluation chart 30 is acquired in advance, for example, by detecting the pressing of the type selection button or the like of the evaluation chart 30 displayed on the liquid crystal display 63 before performing Step S100. Just keep it.

  In step S110, it is determined whether or not an instruction to acquire color information of the color sample of the evaluation chart 30 has been issued, for example, by pressing the touch panel 66 by the user. If the determination is negative, the process of step S110 is repeatedly performed until there is a color information acquisition instruction. If the determination is affirmative, the process proceeds to step S115.

  In step S115, the color information of the color sample located in the range of the acquisition area 303 is acquired and stored in a predetermined area of the RAM 503, for example. Specifically, an image signal included in the acquisition region 303 is extracted from the image signal of the evaluation chart 30, and the display color represented by the image signal is converted into an RGB value, so that the color of each color sample Information is stored in the RAM 503 as RGB values.

In step S120, RGB values corresponding to the color information of each color sample stored in the RAM 503 in step S115 are read out, and the color values L ^* , a ^* , b ^* in the L ^* a ^* b ^* color space, that is, the measured color values. Convert to value. For this conversion, a color conversion table that is a table in which the correspondence between RGB component values and L ^* , a ^* , and b ^* color values is defined is used. The color conversion table is determined by an experiment with an actual device of the smartphone 40, a computer simulation based on the design specification of the smartphone 40, or the like, and is stored in advance in a predetermined area of the nonvolatile memory 504, for example.

  In step S125, the reference color values corresponding to the color samples of the evaluation chart 30 stored in advance in a predetermined area of the nonvolatile memory 504 are read. Note that the method of acquiring the reference color values is not limited to this, and for example, the reference color values corresponding to each color sample of the evaluation chart 30 from the printer 20 connected to a communication line (not shown) via the communication line I / F 68. You may make it acquire a value.

In step S130, the color difference ΔE between the actually measured color value acquired in step S120 and the reference color value acquired in step S125 is calculated for each color sample of the evaluation chart 30, and the calculation result is a predetermined area in the RAM 503. To remember. Here, assuming that the measured color values are (L ₁ ^* , a ₁ ^* , b ₁ ^* ) and the standard color values are (L ₂ ^* , a ₂ ^* , b ₂ ^* ), the color difference ΔE is expressed by equation (1). As required.

In addition, as long as the difference between the measured color value of the color sample and the reference color value is quantitatively expressed, the calculation formula of the color difference ΔE is not limited to the expression (1). Further, if the distance between the origin of the L ^* a ^* b ^* color space and the measured color value is ΔE1, and the distance between the origin of the L ^* a ^* b ^* color space and the reference color value is ΔE2, for example, ΔE1 ≧ ΔE2 In this case, the sign of the color difference ΔE may be set to a plus, and if ΔE1 <ΔE2, the sign of the color difference ΔE may be set to a minus.

  In step S135, the color difference ΔE corresponding to each color sample of the evaluation chart 30 obtained in step S130 is read from the RAM 503, a color difference object is generated according to a predetermined expression method, and the generated color difference object is, for example, non-volatile. Store in a predetermined area of the memory 504. The color difference object representation method is acquired, for example, by detecting a touch of a color difference object representation method selection button or the like displayed on the liquid crystal display 63 with the touch panel 66.

  7A to 7E, for example, the color difference ΔE corresponding to the color sample 1C is “1”, the color difference ΔE corresponding to the color sample 2C is “4”, and the color difference ΔE corresponding to the color sample 3C is FIG. 10 is a diagram illustrating an example of a color difference object representing a color difference ΔE when “10”.

  7A shows the color difference ΔE as a three-dimensional graph, and FIG. 7B shows the color difference ΔE as a numerical value.

  FIG. 7C shows the color difference ΔE by color distinction. For example, when the color difference ΔE is “0”, it is green, when it exceeds “0” and less than “3”, it is yellow, “3” or more “ If it is less than 7 ", it is displayed in orange, and if it is" 7 "or more, it is displayed in red. In this case, specifically, yellow is displayed on the color sample 1C, orange is displayed on the color sample 2C, and red is displayed on the color sample 3C to represent the color difference ΔE. Note that the display color of the color difference ΔE and the range of the color difference ΔE represented by the display color are merely examples, and it is needless to say that display colors and ranges other than the above specific examples may be used.

  FIG. 7D represents the color difference ΔE by pattern distinction. For example, when the color difference ΔE is “0”, it is plain, and when it exceeds “0” and less than “3”, dot drawing (polka dot pattern), If it is “3” or more and less than “7”, it is displayed as an oblique stripe pattern, and if it is “7” or more, it is displayed as a lattice pattern. In this case, specifically, a point drawing is displayed on the color sample 1C, an oblique stripe pattern is displayed on the color sample 2C, and a lattice pattern is displayed on the color sample 3C to represent the color difference ΔE. It should be noted that the pattern of the color difference ΔE and the range of the color difference ΔE represented by the pattern are examples, and it goes without saying that patterns and ranges other than the above specific examples may be used.

  FIG. 7E shows the color difference ΔE by a combination of the three-dimensional graph of FIG. 7A and the numerical values of FIG. In this manner, the color difference object may be generated by combining each of FIGS. 7A to 7D.

  7C and 7D show an example of generating a color difference object having the same size as the display area of the color samples 1C to 3C. However, as shown in FIG. A color difference object smaller than the display area may be generated so that a part of the color sample is displayed. In this case, the correspondence between the color sample and the color difference object is expressed more clearly. On the other hand, FIG. 7A shows an example in which a three-dimensional graph having a bottom area smaller than the display area of the color samples 1C to 3C is generated, but as shown in FIGS. 7C and 7D, A three-dimensional graph having the same bottom area as the display area of the color sample may be generated.

  In step S140, a composite image signal is generated by combining the image of the evaluation chart 30 acquired in step S100 and the color difference object for each color sample of the evaluation chart 30 generated in step S135. At this time, a composite image signal is generated so that the color difference objects are superimposed on the display positions of the color samples of the evaluation chart 30 corresponding to the respective color difference objects.

  In step S145, the composite image signal and the image display instruction are transmitted to the display controller 64 so that the composite image signal generated in step S140 is displayed on the liquid crystal display 63. As a result, a composite image in which the color difference object is superimposed on each color sample of the evaluation chart 30 is displayed on the liquid crystal display 63.

  When the color difference object generated in the previous color evaluation result image generation process is stored in the nonvolatile memory 504 for the same evaluation chart 30, the color difference object generated in the current color evaluation result image generation process And the color difference object generated by the previous color evaluation result image generation processing may be continuously displayed on the liquid crystal display 63 in time series.

  FIG. 8 is a diagram showing this state, and FIG. 8A shows the color difference objects of the evaluation chart 30 stored in the non-volatile memory 504 with the oldest color difference object superimposed on the color samples 1C to 3C. Is displayed. FIG. 8B shows the next old color difference object superimposed on the color samples 1C to 3C, and FIG. 8C shows the newest color difference object superimposed on the color samples 1C to 3C. It is.

  8A, 8B, and 8C are displayed on the liquid crystal display 63 at predetermined intervals, for example, to display the process of changing the color difference ΔE with respect to the color sample of the evaluation chart 30. Compared with the case where the color difference object of the generated evaluation chart 30 is not displayed, the change tendency of the display color of the image formed by the printer 20 is more easily grasped.

  In addition, when the evaluation chart 30 is acquired as a moving image in step S100, if the shooting position of the evaluation chart 30 on the smartphone 40 changes, the size of the evaluation chart 30 displayed on the liquid crystal display 63 is accordingly changed. The display attributes such as the display angle and the display position also change. Therefore, in step S140, when the composite image signal is generated by synthesizing the image of the evaluation chart 30 acquired in step S100 and the color difference object for each color sample of the evaluation chart 30 generated in step S135, the evaluation image changes. Based on the display attribute of the chart 30, the color difference object may be superimposed on the display position of the color sample of the evaluation chart 30 corresponding to each color difference object to generate the composite image signal.

  FIG. 9 is a diagram showing this state. For example, a three-dimensional graph as shown in FIG. 9B is obtained with respect to the image of the evaluation chart 30 acquired at an angle as shown in FIG. 9A. It is assumed that the color difference objects are superimposed on the color samples 1C to 3C and displayed on the liquid crystal display 63. From this state, when the shooting position of the evaluation chart 30 is changed and an image of the evaluation chart 30 is acquired from an angle as shown in FIG. 9C, the color difference object is displayed in accordance with the display attribute of the evaluation chart 30. By displaying, the correspondence between the color sample and the color difference object is displayed so as not to change as shown in FIG.

  The color difference object based on the display attribute of the evaluation chart 30 is generated with reference to a color difference object generation table, for example. The color difference object generation table is a table in which display attributes of the evaluation chart 30 corresponding to the size, display angle, display position, and the like of the marker 301 displayed on the liquid crystal display 63 are defined. It is determined by computer simulation or the like based on the design specifications of the smartphone 40, and is stored in advance in a predetermined area of the nonvolatile memory 504, for example.

  Therefore, for example, in step S140, an image signal corresponding to the marker 301 is extracted, and the size, display angle, display position, and the like of the marker 301 are analyzed to display the evaluation chart 30 via the color difference object generation table. Try to get an attribute. Then, based on the acquired display attributes, a composite image signal may be generated so that the color difference objects are superimposed on the display positions of the color samples of the evaluation chart 30 corresponding to the respective color difference objects.

  As described above, by performing the color evaluation result image generation processing according to the present embodiment, the color difference objects are superimposed and displayed on the video of each color sample of the evaluation chart 30, so that the color sample and the color difference object are displayed. The correspondence becomes clearer.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the above-described embodiment without departing from the gist of the invention, and embodiments to which such modifications or improvements are added are also included in the technical scope of the present invention.

  In this embodiment, the case where a series of image processing is realized by a software configuration has been described. However, the present invention is not limited to this, and for example, the processing may be realized by a hardware configuration. .

  As a form example in this case, for example, there is a form in which a functional device corresponding to a process executed by the CPU 501 is created and used. In this case, the processing speed is expected to be higher than in the case of the present embodiment.

10 Color Evaluation System 20 Printer 30 Evaluation Chart 40 Smartphone 50 Computer 61 Camera Module 63 Liquid Crystal Display 66 Touch Panel

Claims (6)

Receiving means for receiving an image of a color evaluation sheet on which a color sample having predetermined color information is formed;
A composite image in which information representing the difference between the color information of the color sample obtained from the image of the color evaluation sheet received by the receiving means and the predetermined color information is superimposed on the display position of the color sample. Generating means for generating a signal;
Output means for outputting the composite image signal generated by the generation means;
A color evaluation result image generation apparatus comprising: The generating means, when receiving the image of the color evaluation sheet by the receiving means, an acquisition region for acquiring a reference point for matching a marker displayed on the color evaluation sheet and color information of the color sample, The color evaluation result image generation apparatus according to claim 1, wherein a composite image signal superimposed on the image of the color evaluation sheet is generated. The accepting means accepts the image of the color evaluation sheet as a moving image;
The generating means superimposes information representing a difference between the color information of the color sample and the predetermined color information on the display position of the color sample in accordance with a change in the image of the color evaluation sheet. The color evaluation result image generation device according to claim 1 or 2, wherein the signal is generated. The color evaluation result image generation device according to any one of claims 1 to 3, wherein the information representing the difference is information indicated by at least one of a color, a pattern, a character, and a shape. .   A color evaluation result image generation program for causing a computer to function as each means constituting the color evaluation result image generation apparatus according to any one of claims 1 to 4. Photographing means for photographing the color evaluation sheet;
The color evaluation result image generation device according to any one of claims 1 to 4,
Display means for displaying the composite image signal output from the color evaluation result image generating device;
A color evaluation result display device comprising:

Images