JP2014042118A - Color processing device and color processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously display excellently matched images for all of a plurality of observers having different visual characteristics.SOLUTION: Personal color matching data precalculated for a plurality of observers is acquired in S302, and the plurality of observers are classified into a plurality of groups on the basis of the personal color matching data in S303. Then, a display destination is assigned to each of the groups in S304, and a profile corresponding to each of the groups is acquired in S305. Then, an image matched with common image data for each group using the profile is output to the assigned display destination in S306.

Description

  The present invention relates to a color processing apparatus and a color processing method for simultaneously displaying images for a plurality of observers.

  Human visual sensitivity to color appearance is standardized by the CIE (International Commission on Illumination) as a color matching function. In general color matching, a method of digitizing the color of a matching target device (display, printer, etc.) using the CIE color matching function and numerically matching it is used.

  However, human visual sensitivity varies from person to person and does not necessarily match the CIE color matching function. This individual difference in visual sensitivity (hereinafter referred to as visual characteristics) has a significant effect on color matching. Therefore, if color matching is performed according to the appearance of a specific individual, other observers may not be able to achieve sufficient matching. Even when the output colors of both the printer and the display are matched in terms of measured values using the CIE color matching function, matching is not always obtained in the appearance of each individual.

  In order to solve such a problem, a technique has been proposed in which good color management is performed by absorbing individual differences in visual characteristics (see, for example, Patent Document 1). According to this technique, in order to consider individual differences in visual characteristics, first, a comparison experiment between a printed matter using a color chart and a display is performed. Based on the experimental results, a conversion matrix to display colors corresponding to each individual is created, and an image is converted using the conversion matrix, thereby realizing color management that absorbs individual differences in visual characteristics. ing.

JP 2010-268294 A

  According to the color management by the above method, highly accurate matching can be obtained for the observer who performed the comparison experiment. However, when observing by a plurality of persons, matching cannot be obtained for an observer who has not performed the comparative experiment, and therefore another profile is applied. However, no matter which profile is used, it is difficult to obtain matching for all users with one profile.

  In view of the above problems, an object of the present invention is to simultaneously display images capable of obtaining good matching for a plurality of observers having different visual characteristics.

  As a means for achieving the above object, the color processing apparatus of the present invention comprises the following arrangement. That is, color matching data acquisition means for acquiring personal color data calculated in advance for a plurality of observers, classification means for classifying the plurality of observers into a plurality of groups based on the personal color matching data, and An assigning means for assigning a display destination to each of the groups, a profile obtaining means for obtaining a profile corresponding to each of the groups from a plurality of profiles prepared in advance, and the common image data for each group, Output control means for outputting an image subjected to matching processing using the profile acquired by the profile acquisition means to the display destination assigned by the assignment means.

  According to the present invention, it is possible to simultaneously display images that provide good matching for a plurality of observers with different visual characteristics.

The figure which shows the physical structure of the color processing apparatus in one Embodiment which concerns on this invention, The figure which shows the logical structure of a color processing apparatus, The flowchart which shows the display control processing in this embodiment, A diagram showing an example UI for observer information acquisition, A flowchart showing categorization processing; A flowchart showing screen allocation processing; It is a figure which shows the example of personal color data.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments do not limit the present invention related to the scope of claims, and all combinations of features described in the present embodiments are essential for the solution means of the present invention. Is not limited.

<First Embodiment>
Overall Configuration FIG. 1 is a block diagram showing the configuration of the color processing apparatus according to this embodiment. In the figure, an analog broadcast input terminal 101 inputs an analog broadcast signal such as terrestrial analog broadcast or satellite analog broadcast. The analog external input terminal 102 inputs an analog video signal such as a D terminal. The digital broadcast input terminal 103 inputs a digital broadcast signal such as terrestrial digital broadcast or satellite digital broadcast. The digital external input terminal 104 inputs a digital video signal such as HDMI. The analog tuner 105 converts an analog broadcast signal into an analog video signal. The digital tuner 106 converts a digital broadcast signal into a video signal. The A / D converter 107 converts an analog video signal into a digital video signal. The decoder 108 decodes an encoded video signal such as MPEG. The selector 109 selects and outputs either the A / D converted video signal or the decoded video signal. The image processing circuit 110 performs high-quality image conversion such as resolution conversion and edge correction on the video signal input from the selector 109 based on given parameters.

  The CPU 111 controls operations in all the above-described configurations. A hard disk drive (HDD) 112 and a main memory (RAM) 113 provide the CPU 111 with programs, data, work areas, and the like necessary for the processing. The operation unit 114 is a device for inputting an instruction from a user, and corresponds to an instruction input button for receiving an input from a display, a touch panel, or the like. The printer 115 performs color printing of the video signal according to an instruction from the CPU 111. The spectroscopic sensor 116 measures an illumination environment, display color information, printer color information, and the like. The main bus 117 is a bus circuit that connects the image processing circuit 110 and the CPU 111 to the spectral sensor 116. The display panels 118 to 121 are displays that display video signals that have been subjected to image quality enhancement correction and the like.

  Various processes in the present embodiment are realized by the CPU 111 operating various software (computer programs) stored in the HDD 112. That is, first, the CPU 111 activates an information processing application stored in the HDD 112 in accordance with a user instruction to the operation unit 114. Then, the information processing application is expanded in the RAM 113 and a user interface is displayed on the display panel 118. Subsequently, various data stored in the HDD 112 is transferred to the RAM 113 via the main bus 117 based on a command from the CPU 111. Various data transferred to the RAM 113 are subjected to predetermined arithmetic processing in response to a command from the CPU 111, and the processing result is displayed on the display panel 118 via the main bus 117 or stored in the HDD 112.

Display Control Processing In the color processing apparatus according to the present embodiment, display control that allows the display control application to perform color calibration for a plurality of persons based on commands from the CPU 111 will be described below. FIG. 2 is a block diagram showing a logical configuration in the color processing apparatus of the present embodiment. As described above, the configuration shown in FIG. 2 is realized as display control application software.

  In FIG. 2, the color processing apparatus 200 includes an observer acquisition unit 201, an individual color matching data acquisition unit 202, an individual color matching data storage unit 203, a categorization unit 204, a screen allocation unit 205, a profile acquisition unit 206, a profile storage unit 207, An output control unit 208 is included.

  The observer acquisition unit 201 receives information from a user interface (UI) for acquiring observer information displayed on the display panel 118, for example, and acquires information (observer information) that identifies a user who is an observer. . Note that the UI for acquiring observer information displayed on the display panel 118 is displayed under the control of the observer acquiring unit 201. The personal color matching data acquisition unit 202 acquires color matching data corresponding to each observer from the personal color matching data storage unit 203 based on the observer information acquired by the observer acquisition unit 201. The color matching data is output to the categorizing unit 204.

  The categorizing unit 204 classifies the observers into groups that can be matched with one profile based on the individual color matching data for each observer. The screen assignment unit 205 sets an application profile and assigns a display destination panel to each classified group of observers. The profile acquisition unit 206 selects a profile set for each group from the profile storage unit 207 that stores a plurality of profiles prepared in advance. Then, the output control unit 208 controls the output of the image data to be displayed separately input to each display panel in accordance with the allocation instruction from the screen allocation unit 205.

  FIG. 3 is a flowchart showing display control processing executed by the color processing apparatus 200. First, in S301, the observer acquisition unit 201 displays on the display panel 118 an observer information acquisition UI that accepts input of information necessary for specifying an observer, and acquires observer information in response to a user input to the UI. Details of the UI for obtaining observer information displayed here will be described later. In step S302, the personal color matching data acquisition unit 202 acquires personal color matching data corresponding to the observer information acquired in step S301 from the personal color matching data storage unit 203. Here, the personal color matching data storage unit 203 stores personal color matching data such as color matching points calculated in advance as color matching adjustment results for each of a plurality of users. Specifically, as shown in FIG. 7, for each user with respect to a predetermined color (Lab value), the Lab value of the output color of the output device (in this case, the display panel) that is color-matched is held as color matching point information, Furthermore, information on a permissible range indicating a permissible color difference of Lab values that are color matching points is held.

  Next, in S303, the categorizing unit 204 classifies (categorizes) the observers into groups based on the individual color matching data for each observer acquired in S302. Although details of this categorization process will be described later, observers whose colors are close to each other are grouped. In step S304, the screen assignment unit 205 determines which of the display panels 118 to 121 the display for each classified group is assigned according to the classification result in step S303. Details of this screen allocation processing will be described later.

  In step S305, the profile acquisition unit 206 acquires an optimal profile for each group from the profile storage unit 207. Here, the profile storage unit 207 stores, for example, a plurality of types of profiles corresponding to users held in the personal color matching data storage unit 203. In S305, for example, a profile corresponding to a representative observer for each group Should be selected.

  In step S306, the output control unit 208 applies the profile acquired in step S305 to each group classified in step S303 for the image data that is a common display target, and the display panels 118 to 121 assigned in step S304. To display. At this time, a display indicating the target observer may be added to the display images on the display panels 118 to 121.

User Interface FIG. 4 shows an example of the observer information acquisition UI displayed in S301. In the figure, all users registered in the user DB (not shown) are displayed in the user list combo box 401, and a list of users selected as observers by the user from the combo box 401 is displayed in the selection list combo box 402. Is displayed. As the user DB, the personal color matching data storage unit 203 shown in FIG. 7 may be applied. An add button 403 is a button for adding the user selected in the user list combo box 401 to the selection list. The setting button 404 is a button for determining the user currently displayed in the selection list combo box 402 as an observer. An end button 405 is a button for instructing the end of the UI display.

  In the present embodiment, an example is shown in which observer information is acquired by direct input from the user via the UI shown in FIG. 4, but for example, a group of a plurality of observers is photographed and face recognition is performed from the photographed images. May be used to identify the observer.

● Categorize processing (S303)
Hereinafter, the categorization process in S303 will be described with reference to the flowchart of FIG. Note that categorization in this embodiment is performed for an observer or a group that has been classified. Hereinafter, both are collectively referred to as an observer, and description will be made assuming that categorization is performed for the observer.

  First, in step S501, the categorizing unit 204 searches for a combination in which color matching data between observers has a minimum color difference. For example, with respect to the personal color data of the reference observer, if a cluster analysis is performed by the WARD method with the color difference (color difference between the same color points) from the other person's personal color data as an evaluation value, good. Then, in S502, it is determined whether or not the color difference of the same color data is within the allowable range for the observer combination acquired in S501. This allowable range is stored in advance as personal color matching data as shown in FIG. If it is determined that the color difference is within the permissible range, the process proceeds to S503, and if not, the process proceeds to S504. In S503, the observers of the combination acquired in S501 are classified into the same group, and the process proceeds to S504. In S504, it is determined whether or not the classification for all observers has been completed. If there is an unclassified observer, the process returns to S501.

  As described above, in the categorization process of the present embodiment, the processes of S501 to S503 are repeated until the classification of all the observers is completed in S504. In S503, after the observers with the smallest color difference in the personal color data are classified into the same group, other observers with the smallest color difference with the group are searched for in the group after the classification in S501. . At this time, a representative observer in the group may be set, and another observer having a minimum color difference may be searched using the personal color data as a reference. That is, the observer (representative observer) serving as the reference for the search in S501 is fixed until an observer whose color difference is outside the allowable range appears in S502. An observer detected as a color difference outside the allowable range forms a new group as the next representative observer. As a result, for one representative observer, observers whose color differences in the color matching data are within the allowable range are sequentially extracted and grouped in ascending order of color difference. Note that the method for setting the first representative observer is not particularly limited, but can be determined according to the priority set in advance for each user, for example.

  By the categorization process of the present embodiment, observers whose color differences are within an allowable range, that is, observers whose colors are close to each other are grouped. That is, an observer having color matching data close to the representative observer belongs to the representative observer group. Therefore, it is determined that a profile suitable for the representative observer of the group can be used by other observers belonging to the group, and the profile can be shared within the group.

● Screen assignment processing (S304)
Hereinafter, the screen allocation process in S304 will be described with reference to the flowchart of FIG.
In step S601, the screen assignment unit 205 first counts the number of groups classified in step S303. In S602, the count value is compared with the number of usable display destinations (display panels 118 to 121). If the count value, that is, the number of groups is larger, the process proceeds to S603, and if not, the process proceeds to S604. In S603, a priority is assigned to each group, and it is determined whether or not to perform display on the panel. Here, it is assumed that the priority is set higher as the number of observers included in the group increases. However, the priority setting method is not limited to this example. For example, a priority is set for each user in advance, and the group is set according to the highest priority in the group or the total or average of the priorities of a plurality of users. Priorities may be determined. Note that the non-display groups determined to be non-displayable may be transmitted to the output control unit 208 so as to notify (for example, display) that these are not displayed as a warning. In step S604, a display destination panel is assigned to the display group to be displayed, and the process ends. Note that the assignment order is not particularly limited as long as the group and the panel can be associated with each other on a one-to-one basis.

  As described above, according to the present embodiment, it is possible to classify observers based on individual color matching data for each observer, and to apply an appropriate profile for each observer group. Thereby, the display which implement | achieved the favorable matching process with respect to all the several observers can be performed with respect to common image data.

  In this way, it becomes possible to display a plurality of panels corresponding to individual color data, for example, by separating a plurality of observers into separate rooms for each of the above groups, and the appearance of each color on a monitor installed in each room. It is possible to display an image corresponding to the characteristics of the image and observe it simultaneously. That is, this embodiment is effective when it is necessary for a plurality of people to strictly judge the color, and for example, color calibration by a plurality of people can be performed simultaneously.

  In this embodiment, an example in which a plurality of display panels (118 to 121) are provided and display is performed for each group on each display panel is shown. However, the present invention is not limited to this example, and matching for a plurality of observers is performed. It suffices if processing can be performed simultaneously. Therefore, for example, it is possible to divide one display screen into a plurality of areas and perform display by assigning a group to each area.

  Further, in the present embodiment, as shown in FIG. 7, an example is shown in which the same color data for one reference color is stored as the personal color data, but of course, each person's same color data for a plurality of reference colors It is also possible to hold In this case, for example, in S501, an observer combination that minimizes the color difference may be searched according to a total value obtained by adding a predetermined weight to the color difference for each reference color or an average square error.

<Other embodiments>
The present invention can also be realized by executing the following processing. That is, computer-readable software (computer program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media. This is a process in which a computer (or CPU, MPU, etc.) of the system or apparatus reads and executes the program.

Claims (11)

Color matching data acquisition means for acquiring personal color matching data calculated in advance for a plurality of observers;
Classification means for classifying the plurality of observers into a plurality of groups based on the personal color matching data;
Assigning means for assigning a display destination to each of the groups;
Profile acquisition means for acquiring a profile corresponding to each of the groups from a plurality of profiles prepared in advance;
Output control means for outputting, to the display destination assigned by the assigning means, an image subjected to matching processing using the profile obtained by the profile obtaining means for each group for the common image data;
A color processing apparatus comprising:   2. The color processing apparatus according to claim 1, wherein the individual color matching data includes information on a color matching point of an observer for a predetermined color and information on an allowable range of a color difference with respect to the color matching point.   The classifying means extracts, from among the plurality of observers, an observer whose color difference between the color matching points in the personal color matching data is within the allowable range with respect to a reference representative observer, 3. The color processing apparatus according to claim 2, wherein the extracted observer is classified so as to be in the same group as the representative observer.   4. The color processing apparatus according to claim 1, wherein the assigning unit assigns one display destination to the group.   The assigning means assigns the display destination according to the priority of each group when the number of the groups is larger than the number of the display destinations, and warns the information of the group for which the display destination is not assigned. 5. The color processing apparatus according to claim 4, wherein:   6. The color processing apparatus according to claim 3, wherein the profile acquisition unit acquires a profile corresponding to the representative observer in the group. Storage means for storing personal color data calculated in advance for a plurality of users;
Selecting means for selecting the plurality of observers from a plurality of users stored in the storage means;
7. The color processing apparatus according to claim 1, wherein the color matching data acquisition unit acquires personal color matching data for each observer from the storage unit.   8. The color processing apparatus according to claim 1, wherein the plurality of display destinations are a plurality of display apparatuses.   8. The color processing apparatus according to claim 1, wherein the plurality of display destinations are a plurality of areas obtained by dividing a display screen. A color processing method in a color processing apparatus having uniform color data acquisition means, classification means, assignment means, profile acquisition means, and output control means,
The color matching data acquisition means acquires personal color matching data calculated in advance for a plurality of observers,
The classification means classifies the plurality of observers into a plurality of groups based on the personal color matching data;
The assigning means assigns a display destination to each of the groups,
The profile acquisition means acquires a profile corresponding to each of the groups from a plurality of profiles prepared in advance,
The output control means outputs, to the display destination assigned by the assignment means, an image obtained by performing matching processing on the common image data for each group using the profile obtained by the profile acquisition means. A characteristic color processing method.   10. A computer program for causing a computer to function as each unit of the color processing apparatus according to claim 1 when executed by the computer.

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