JP2008306305A - Color conversion table editing device and color conversion table editing method, program, and storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a user interface capable of improving operability in editing a color conversion table. <P>SOLUTION: A user interface of application is provided to edit typical color data so as to make the typical color data close to a target color on a two dimension plane, optimize the whole color, and generate a color conversion table. When a control point of the target color data for editing is moved onto the two dimension plane with a pointing device such as a mouse and a color is changed in editing works, an editing task is supported by displaying a guide line indicative of an area where hue and/or saturation does not change. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a color conversion table editing apparatus, a color conversion table editing method, a program, and a storage medium that perform color processing particularly in image processing of image data captured by a digital camera or the like.

  2. Description of the Related Art Conventionally, many image processing apparatuses that adjust the hue, saturation, and brightness of image data as a whole with respect to image data captured by an image input apparatus such as a digital camera have been proposed. For example, an editing apparatus has been proposed in which a color conversion table that can adjust the hue and saturation only for a specific color in image data is created, and the image can be adjusted using the created color conversion table ( Patent Document 1).

  However, such a color conversion table editing apparatus needs to prepare a plurality of input data, and has become an incomprehensible interface for realizing a desired color reproduction. Therefore, it has become an editing device that is difficult for an unfamiliar user.

In addition, many user interfaces of conventional editing apparatuses edit colors by combining the operation of one-dimensional adjustment control such as a slider for the hue and saturation of the target color. Therefore, there is a problem that even a familiar user has a lot of editing operations.
JP-A-10-133638

  In order to solve the above-described problems of the prior art, the following configuration is conceivable. First, a color conversion table suitable for a shooting scene of image data prepared in advance is selected. Based on the color conversion table, a representative color is operated on a two-dimensional plane such as an ab plane in the Lab coordinate system.

  As a result, it is expected that the number of operations and operations for editing and editing operations can be reduced. However, on the other hand, there arises a new problem that it is difficult to perform an operation when editing while maintaining hue and saturation.

  In view of the above problems, an object of the present invention is to provide a color conversion table editing apparatus that can easily perform color reproduction according to a user's desire.

In order to achieve the above object, a color conversion table editing apparatus according to an embodiment of the present invention includes:
A color conversion table editing device for displaying a display screen including a user interface and editing a color conversion table before editing for image data,
Operating means for operating the user interface;
Color conversion table selection means for selecting the color conversion table before editing;
Color data processing means for generating a color conversion table after editing;
With respect to the image data, for each of a plurality of representative colors selected in advance, representative color data including control points of the plurality of representative colors is displayed in a color space on a two-dimensional plane by the color conversion table before editing. Hue / saturation editing means for editing hue and saturation;
A guide line generating means for generating a guide line indicating a direction in which at least one of the hue and saturation does not change, and
The hue / saturation editing unit edits the color conversion table before editing by moving the control points of the plurality of representative colors by the operation unit,
The color data processing means generates the edited color conversion table according to the editing result, and
When any of the plurality of representative color control points is moved by the operation means, the guide line is displayed in a color space on the two-dimensional plane in relation to the movement of the control points. And

In order to achieve the above object, a method for controlling a color conversion table editing apparatus according to another embodiment of the present invention includes:
A control method of a color conversion table editing apparatus for displaying a display screen including a user interface and editing a color conversion table before editing for image data,
An operation step of operating the user interface;
A color conversion table selection step for selecting the color conversion table before editing;
A color data processing step for generating a color conversion table after editing;
Regarding the image data, for each of a plurality of representative colors selected in advance, representative color data including control points of the plurality of representative colors is displayed in a color space on a two-dimensional plane by the color conversion table before editing. Hue / saturation editing process for editing hue and saturation,
A guide line generating step for generating a guide line indicating a direction in which at least one of the hue and saturation does not change, and
In the hue / saturation editing step, the color conversion table before editing is edited by moving control points of the plurality of representative colors in the operation step,
The color data processing step generates the edited color conversion table according to the result of the editing, and
When moving any of the control points of the plurality of representative colors in the operation step, the guide line is displayed in a color space on the two-dimensional plane in relation to the movement of the control point. And

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the user interface which improves the operativity of edit of a color conversion table.

  Hereinafter, a color conversion table editing apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

<Embodiment 1>
FIG. 1 is a schematic block diagram of a color conversion table editing apparatus according to Embodiment 1 of the present invention. In FIG. 1, the system control unit 101 controls the overall operation of the color conversion table editing apparatus 100, communicates with each other unit, commands a desired operation to each unit, and executes various functions in cooperation with each unit. .

  The operation unit 102 includes a mouse, a keyboard, and the like, receives a user command, and notifies the system control unit 101 of the command. The input / output unit 103 receives the input of the selected image data from the file system unit 108 and notifies the system control unit 101 or stores the created custom, that is, the edited color conversion table in the file system unit 108. Output.

  The color data processing unit 104 generates initial data of the target color and requests the display control unit 106 to generate display data of the target color data, or generates optimized color data and optimizes the display control unit 106. Requests generation of display data for color data. Alternatively, a color conversion table after editing that is a user's custom is generated and notified to the image processing unit 105, and requested to be applied to the selected image data, or notified to the system control unit 101, and sent to the file system unit 108. Request saving.

  The image processing unit 105 includes the selected image data input from the input / output unit 103, the color conversion table before editing selected by the user from the memory unit 107, and the color conversion table after editing acquired from the color data processing unit 104. The pre-edit image and post-edit image are formed. The display control unit 106 is requested to generate the entire display data, and the generated display data is displayed on the display device 109.

  The display control unit 106 allows the user to display the initial data of the target color acquired from the color data processing unit 104, the optimized color data, and the pre-edit image and the post-edit image acquired from the image processing unit 105 at the same time. Display data including the interface function is generated.

  The memory unit 107 is a storage device for temporarily storing image data input from the input / output unit 103, representative color data, a user-selectable color conversion table, and the like. The file system unit 108 is a database that stores image data notified to the input / output unit 103 or stores an edited color conversion table generated by a color data processing unit.

  Furthermore, the color conversion table editing apparatus 100 according to the first embodiment includes a guide line generation unit 110 that generates a guide line as an index based on the output of the color data processing unit 104 and outputs the guide line to the display control unit 106. Yes.

  FIG. 2 is a diagram showing a main configuration of a display screen 200 having an interface function with a user, which is displayed on the display device 109 of the color conversion table editing apparatus 100 shown in FIG. In the display screen 200 of FIG. 2, an image data selection unit 201 is a user interface that allows the user to select and read arbitrary image data. The color conversion table selection unit 202 is a user interface for selecting an unedited color conversion table that is a source of an edited color conversion table to be created by the user.

  The hue / saturation editing unit 203 displays the hue and saturation data in a two-dimensional plane among the initial data of the target color, the target color data operated by the user, and the optimized color data. Further, the target color data is a user interface that controls the editing so that the target color data can be edited by the user's operation such as mouse dragging. The brightness editing unit 204 displays data regarding brightness among the initial data of the target color, the target color data operated by the user, and the optimized color data. Furthermore, the target color data is a user interface that controls to enable editing by a user's mouse drag operation or the like.

  The pre-edit image display unit 205 is a display unit that displays image data obtained as a result of applying the color conversion table selected by the user to the image data selected by the image data selection unit 201 by the color conversion table selection unit 202.

  The edited image display unit 206 reflects the result of the user's operation in the hue / saturation editing unit 203 and the brightness editing unit 204 on the color conversion table selected by the user by the color conversion table selection unit 202. . The display unit displays an image obtained as a result of applying the edited color conversion table to the image selected by the image data selection unit 201.

  FIG. 3 is a flowchart for explaining the operation of the color conversion table editing apparatus 100 according to the embodiment of the present invention, and showing a procedure for creating a color conversion table after editing by the user.

  First, in step S301, the image data selected by the image data selection unit 201 is input, and in step S302, the color conversion table before editing selected by the color conversion table selection unit 202 is input.

  In step S303, the selected image data and the selected color conversion table are input to the color data processing unit 104 together with the representative color data acquired from the memory unit 107, and initial data of the target color is generated. The generated initial data of the target color is converted into display data by the display control unit 106 and displayed on the hue / saturation editing unit 203 of the display screen 200 on the two-dimensional plane by the display device 109. At this time, the image data and the color conversion table before editing are stored in the memory unit 107.

  In step S304, the input image data and the selected color conversion table are input to the image processing unit 105, image data before editing is generated, and the display control unit 106 converts the image data into display data. Then, the display device 109 displays the pre-edit image on the pre-edit image display unit 205 of the display screen 200.

  Then, it progresses to step S305 and it is judged whether the user changed the target color, ie, one of the control points, or the brightness. That is, when the user's operation is an operation on the hue / saturation editing unit 203 or the lightness editing unit 204 by the operation unit 102, it is determined that the target color has been changed by the user operation, and is described below. Processes are executed in order.

  If any other operation is performed or if no operation is performed, nothing is done and the process proceeds to step S309. Then, the current color conversion table is stored in the file system unit 108 as an edited color conversion table, and the process is terminated.

  However, if it is determined in step S306 that the user has changed the target color by changing the control point or brightness, the process proceeds to step S306. The following description is only for the case where any one of the control points is changed.

  In step S <b> 306, first, target color data operated by the user is acquired from the hue / saturation editing unit 203 and the lightness editing unit 204 and supplied to the color data processing unit 104. The color data processing unit 104 acquires the representative color data and the pre-edit color conversion table selected by the user from the memory unit 107, executes an optimization process so that these approach the target color data described above, and the optimized color data Is generated.

  In step S307, the color data processing unit 104 generates an edited color conversion table from the generated optimized color data. Thereafter, the process proceeds to step S308, and the color data processing unit 104 inputs the generated color conversion table after editing to the image processing unit 105, and generates edited image data. The data is converted into display data by the display control unit 106 and displayed on the edited image display unit 206 of the display screen 200 by the display device 109.

  The user performs the above operations and compares the edited image and the unedited image on the display screen 200 generated as a result of the operation, or compares the initial data of the target color data with the optimized color data, It can be readily determined whether a color conversion table has been created. If the user determines that a favorite color conversion table has been created, the editing operation is terminated, the edited color conversion table generated last in step S310 is stored in the file system unit 108, and the editing process is terminated.

  Hereinafter, the hue / saturation editing unit 203 of the display screen 200 including the user interface for the user to change the target color will be described in detail.

  FIGS. 4A and 4B show an example of the hue / saturation editing unit 203 immediately after the user selects the color conversion table before editing in the color conversion table selection unit 202. Here, multiple representative color data are defined as 8 colors of “green”, “yellow”, “orange”, “red”, “purple”, “blue-purple”, “blue”, “blue-green” . The eight color representative color data and the color conversion table selected by the user are input to the color data processing unit 104. Then, display data is generated by the display control unit 106 and displayed on the display device 109 as if the target color data generated by the color data processing unit 104 is plotted as a rectangle at a corresponding position on the two-dimensional ab plane. The

  At this time, the plotted points are set as control points 403, and a plurality of, in this case, eight control points 403 are connected and displayed.

  Also, two color palettes 401 and 402 corresponding to the points plotted on the outer periphery of the ab plane are displayed. In the case of the figure, the inner color palette 402 is in a state before the target color data is operated by the user. Therefore, the color palettes 401 and 402 are filled with the initial data color of the target color both inside and outside. Yes. Since there are eight representative colors, the color palette 401 displays eight colors and the color palette 402 displays eight colors. The line connecting the color palettes 401 and 402 and the control point 403 merely indicates a correspondence relationship and may not be present.

  Further, when the user operates the target color on the ab plane, the background 404 of the ab plane is painted in a gradation with the corresponding color so that it becomes a guideline as to what color it will be when it is moved to which coordinate. Yes.

  4B shows the hue / saturation editing unit 203 displayed immediately after the user selects the color conversion table, as in FIG. 4A. However, this is an example in which a color conversion table different from that in FIG. 4A (here, a color conversion table in which “green” and “blue” colors are strong) is selected. For this reason, since the initial data of the target color data is different from that in FIG. 4A, the display position of the control point 403 is also an example.

  5A and 5B show the hue / color when the user performs a click operation with the mouse on the target color or the color palette 402 on the outer periphery of the ab plane in the color conversion table selection unit 202. The example of a display of the degree edit part 203 is shown.

  First, as shown in FIG. 5A, when the control point 403 of the target color (in this case, “orange”) is clicked with the mouse, the target color is brought into a focus state, and the focus frame 405 is drawn on the ab plane. You can move. At this time, the corresponding color palettes 401 and 402 are also in the focused state at the same time, and the focus frame 406 is drawn.

  On the other hand, when the color palettes 401 and 402 are clicked, the color palettes 401 and 402 and the corresponding target color control point 403 are brought into the focus state.

  Next, in FIG. 5B, when the control point 403 of two target colors is displayed overlapping on the ab plane, and it is desired to operate only the lower control point 403, the operation is facilitated. An example of such display is shown.

  That is, in such a case, if the upper target color is first operated in order to operate the lower target color, optimization is performed at that timing, and the intended result cannot be obtained. Therefore, when the user clicks the color palette 401 or 402 corresponding to the lower target color, the lower target color control point 403 is displayed in the foreground, and the target color control point 403 can be easily operated thereafter. Will be able to.

  FIG. 6 shows an example of display on the hue / saturation editing unit 203 in the color conversion table editing apparatus 100 when the user performs a target color editing operation.

  The user clicks the mouse on the control point 403 of the target color on the ab plane or the outer color palette 401 to bring the target control point 403 into a focus state and select a representative color to be changed. .

  The focus state of the control point 403 may be moved to the adjacent control point 403 by inputting a tab key on the operation unit 102 or the like. It is possible to move the target color being operated to the coordinate position corresponding to the target color by dragging the mouse on the control point 403 thus focused or operating the arrow keys on the keyboard. It becomes.

  After the operation of moving the control point 403, the position of the moved control point 403 is determined as the target color position, and the color data processing unit 104 generates optimized color data for each target color. Then, display data is generated by the display control unit 106 and displayed on the display device 109 so that the optimized color data is displayed at the coordinate position of the corresponding color on the ab plane, similarly to the target color data. At this time, in order to distinguish from the target color data, the control points 407 of the optimized color data are round, and the control points 407 of the optimized color data are connected with a broken line.

  Further, the drawing color inside the outer color palette 401 is the color after optimization of the corresponding target color, and for each representative color data, the value of the initial data of the target color and the change in color after optimization Can be seen at a glance.

  As described above, the user interface is such that the user can adjust the color as intended by a simple operation of moving the target color to the target color position.

  At this time, basically, the color changes so that the saturation increases when the control point 403 is moved from the center on the ab plane toward the outer periphery, and when the control point 403 is moved toward the center, the color changes. If you move in the direction of the arc, the hue will change.

  FIG. 7 shows a human chroma curve in the ab plane. A line 701 radially connected from the center indicates a position where the hue does not change, and a line 702 connected circularly indicates a position where the saturation does not change. As can be seen from FIG. 7, the position where the hue does not change is not a straight line but a curve from the center. Also, the position where the saturation does not change is not simply an arc that is equidistant from the center, but is deformed to be distorted.

  This means that when the control point 403 is moved to the target color as described with reference to FIG. 6, it may be desired to move the control point 403 without changing either the hue or the saturation. In this case, contrary to the intention that the characteristics of the ab plane are not correctly understood, there arises a problem that the color and saturation change in relation to the movement of the target color.

  In the first embodiment, a guide line generation unit 110 is provided in order to prevent the above problem in editing work so that any user can cope. Then, as shown in FIG. 8A, when the control point 403 is in a focused state, guide lines 801 and 802 indicating positions where the hue and saturation do not change are displayed. A guide line 801 representing a position where the hue does not change is a curve extending radially from the center. On the other hand, a guide line 802 representing a position where the saturation does not change is a deformed circle.

  Since the hue is not significantly changed in normal use, the guide line 802 indicating the position where the saturation does not change is not only a circle that spans all hues as shown in FIG. You may make it display in the form of the arc which displays. Further, in order to simplify the calculation and drawing, the guide display may be a broken line instead of a curve.

  In addition, in order to support the user's operation, by pressing a shift key or a control key on the keyboard of the operation unit 102, the operation is limited so that the control point 403 moves only to a position where the hue or saturation does not change. A simple user interface may be used. In any case, it is sufficient that at least one of the guide lines does not change.

  In this way, when the user moves the control point 403 to the target color by dragging the mouse or the like, the guide line is updated so that the position at which the hue and saturation do not change is automatically displayed. To do.

  On the other hand, when the guide line is displayed when the control point 403 is in the focused state, if the user interface feels troublesome, the guide lines 801 and 802 may be displayed only while the control point 403 is being dragged. Good. In this case, the guide line displayed during the dragging displays a position where the hue and saturation do not change at the position before starting the dragging. When the drag ends, the guide line is immediately hidden.

  Since the display of the guide line may be rather annoying for the skilled person, the display of the hue guide line and / or the saturation guide line is controlled to be displayed / hidden in the application settings. It is preferable to let the user select. This operation may be displayed as a user interface on the keyboard of the operation unit 102 or the display screen 200.

  In the first embodiment, when the user operates the target color on the ab plane of the Lab coordinate system, the background of the ab plane is supported so that it can be used as an indication of what color the color will be moved to. In the above example, the color is filled with gradation. This is because it is important that any user can operate sensuously, but when a highly saturated color is placed on the background when performing subtle color correction, those colors are displayed. It is conceivable that the correction work will be hindered.

  Therefore, it may be preferred that the background of the hue / saturation editing unit 203 is achromatic. In this case, the hue guide line or the saturation guide line can be used as an indicator of the color to be obtained by applying a gradation as a target color at that position.

  According to the first embodiment of the present invention, when editing target color data of interest, by providing a guide line that serves as an index that does not change hue or saturation, editing work different from the purpose may not be performed unintentionally. A user interface is provided to assist. Furthermore, it is possible to create a color conversion table that allows any user to easily reproduce a favorite color.

<Embodiment 2>
In the first embodiment, the embodiment in the color space of the Lab coordinate system has been described. However, the color space may be the display screen 200 including the user interface in the HSB coordinate system.

  FIG. 9A shows an example of the hue / saturation editing unit 203 in the display screen 200 including the user interface when the color space of the hue / saturation editing unit 203 is an HS plane in the HSB coordinate system. The basic user interface is the same as that of the first embodiment except that the color space coordinate system is different.

  When the HS plane in the HSB coordinate system is used, the position of the guide line 801 where the hue does not change is on a straight line connecting the center of the coordinate and the control point 403. The position of the guide line 802 where the saturation does not change is a position on a circle that is equidistant from the center. Therefore, as shown in FIG. 9B, the guide lines 801 and 802 to be displayed are straight lines when the hue does not change, and the guide lines 802 where the saturation does not change are circles or arcs. .

  The timing for displaying the guide lines 801 and 802 may be set when the control point 403 is in the focused state, during the dragging of the control point 403, or the like, as in the first embodiment.

  FIG. 10 is a flowchart for explaining the guide line display operation described in the first and second embodiments. This process is executed in the editing work in steps S305 to S309 described with reference to FIG.

  First, after the processing is started, whether to display the guide lines 801 and 802 is set in step S1001. In this case, when displaying the guide line, it is also set whether or not to display only during the mouse drag of the operation unit 102. Thereafter, the process proceeds to step S1002, and it is determined whether or not the setting is set to display the guide line only during the dragging of the mouse. If it is determined that the setting to always display is made, the process proceeds to step S1004.

  Then, the editing operation is performed by operating the control point 403 or the like while always displaying the guide lines 801 and 802. When the control point 403 is moved, the process proceeds to step S1005, where the guide line generation unit 110 updates and displays the guide line. Next, the process proceeds to step S1006, where it is determined whether the user has input the end of editing using the operation unit 102. If the input is completed, the editing ends. If there is no input for the end of editing, step S1004 is performed. Return to, and continue editing.

  On the other hand, if it is determined in step S1003 that the guide line display is set only during mouse dragging, the process advances to step S1007.

  In step S1007, the guide line is displayed only during dragging of the control point 403 by the mouse, and the editing operation is performed. Also in this case, if the control point 403 is moved, the process proceeds to step S1008, and the guide line generation unit 110 updates and displays the guide line. Next, the process proceeds to step S1009, where it is determined whether or not the user has input the end of editing using the operation unit 102. If it is input, the editing ends. If there is no input to end editing, step S1007 is performed. Return to, and continue editing.

  On the other hand, if the setting in step S1001 is a guide line non-display setting, the process proceeds to step S1010 based on the determination in step S1002. In step S1010, the editing operation is performed without displaying the guide lines 801 and 802. In step S1011, it is determined whether or not the user has input the end of editing using the operation unit 102. If the user has input, the editing ends. If there is no editing end, the process returns to step S1010. The editing work will be continued. Thereafter, the process proceeds to step S307 in FIG. 3, but the subsequent description is omitted here.

  As described above, according to the color conversion table editing apparatus according to Embodiments 1 and 2 of the present invention, it is possible to execute an editing operation in accordance with the user's preference and skill level.

  The present invention can also be implemented by supplying a storage medium storing software program codes for realizing the functions of the above-described embodiments to a system or apparatus.

  That is, the object of the present invention can also be achieved by reading and executing a program code stored in a storage medium by a computer (or CPU or MPU) of the system or apparatus. In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention. As a storage medium for supplying the program code, for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS or the like running on the computer performs actual processing based on an instruction of the program code. Some or all may be done. Thus, the present invention includes a case where the functions of the above-described embodiments are realized by the processing.

  Furthermore, in the present invention, the program code read from the storage medium can be written in a memory provided in a function expansion board inserted in the computer or a function expansion unit connected to the computer. Therefore, the function of the above-described embodiment is realized by performing part or all of the actual processing by the CPU provided in the function expansion board or function expansion unit based on the written program code instruction. Is also included.

It is a schematic block diagram which shows the main structures of the color conversion table editing apparatus which concerns on embodiment of this invention. It is a figure which shows an example of the display screen containing the user interface used with the color conversion table editing apparatus which concerns on embodiment of this invention. It is the flowchart which showed the procedure which produces the color conversion table after editing in the color conversion table editing apparatus which concerns on embodiment of this invention. It is a figure which shows an example of the hue / saturation editing part of a user interface immediately after selecting the color conversion table in the color conversion table editing apparatus which concerns on embodiment of this invention. It is a figure which shows the state of the hue and the saturation edit part when the target color is selected in the color conversion table editing apparatus which concerns on embodiment of this invention. It is a figure which shows an example of the user interface at the time of performing operation of edit of the target color in the color conversion table editing apparatus which concerns on embodiment of this invention. It is a figure which shows the human chroma curve in ab plane in the color conversion table editing apparatus which concerns on embodiment of this invention. It is a figure which shows one example of the display of the guide line which does not change the hue and saturation in ab plane in the color conversion table editing apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the display of the guide line which does not change the hue and saturation in HS plane in the color conversion table editing apparatus which concerns on Embodiment 2 of this invention. 6 is a flowchart for explaining a guide line display operation in the color conversion table editing apparatus according to the first and second embodiments of the present invention.

Explanation of symbols

100 color conversion table editing apparatus 101 system control unit 102 operation unit 103 input / output unit 104 color data processing unit 105 image processing unit 106 display control unit 107 memory unit 108 file system unit 109 display device 110 guide line generation unit 201 image data selection unit 202 Color conversion table selection unit 203 Hue / saturation editing unit 204 Lightness editing unit 205 Pre-editing image display unit 206 Post-editing image display unit 403 Control points 801 and 802 Guide lines

Claims (10)

A color conversion table editing device for displaying a display screen including a user interface and editing a color conversion table before editing for image data,
Operating means for operating the user interface;
Color conversion table selection means for selecting the color conversion table before editing;
Color data processing means for generating a color conversion table after editing;
Regarding the image data, for each of a plurality of representative colors selected in advance, representative color data including control points of the plurality of representative colors is displayed in a color space on a two-dimensional plane by the color conversion table before editing. A hue / saturation editing means for editing the hue and saturation;
A guide line generating means for generating a guide line indicating a direction in which at least one of the hue and saturation does not change, and
The hue / saturation editing unit edits the color conversion table before editing by moving the control points of the plurality of representative colors by the operation unit,
The color data processing means generates the edited color conversion table according to the editing result, and
When any one of the plurality of representative color control points is moved by the operation means, the guide line is displayed in a color space on the two-dimensional plane in relation to the movement of the control points. Color conversion table editing device. The display screen uses a pre-editing image display unit that displays an image using image data before being edited by the hue / saturation editing unit, and image data reflecting the edited color conversion table. Including a post-edit image display for displaying images
The hue / saturation editing means displays control points of a plurality of optimized color data optimized in the color conversion table after editing in correspondence with the control points of the plurality of representative colors. The color conversion table editing apparatus according to claim 1.   The color conversion table editing apparatus according to claim 1, wherein the operation unit is configured to select display or non-display of the guide line.   3. The color conversion table editing according to claim 1, wherein the operation unit is configured to display the guide line only when one of the plurality of representative color control points is selected. apparatus.   5. The color conversion according to claim 1, wherein the operation unit sets the control points of the plurality of representative colors only in a direction indicated by the guide line. 6. Table editing device.   The color conversion table editing apparatus according to claim 1, wherein the color space in the two-dimensional plane is an ab plane in a Lab coordinate system.   The color conversion table editing apparatus according to claim 1, wherein the color space in the two-dimensional plane is an HS plane in the HSB coordinate system. A control method of a color conversion table editing apparatus for displaying a display screen including a user interface and editing a color conversion table before editing for image data,
An operation step of operating the user interface;
A color conversion table selection step for selecting the color conversion table before editing;
A color data processing step for generating a color conversion table after editing;
With respect to the image data, for each of a plurality of representative colors selected in advance, representative color data including control points of the plurality of representative colors is displayed in a color space on a two-dimensional plane by the color conversion table before editing. Hue / saturation editing process for editing hue and saturation,
A guide line generating step for generating a guide line indicating a direction in which at least one of the hue and saturation does not change, and
The hue / saturation editing step edits the color conversion table before editing by moving control points of the plurality of representative colors in the operation step,
The color data processing step generates the edited color conversion table according to the editing result, and
When any one of the plurality of representative color control points is moved in the operation step, the guide line is displayed in the color space on the two-dimensional plane in relation to the movement of the control points. A control method of the color conversion table editing apparatus.   A program for causing a computer to execute each step of the control method of the color conversion table editing apparatus according to claim 8.   A computer-readable storage medium storing a program for causing a computer to execute each step of the color conversion table editing apparatus control method according to claim 8.