WO2013133336A1 - 色再現方法、色再現システム、色再現プログラムおよび色再現装置 - Google Patents
色再現方法、色再現システム、色再現プログラムおよび色再現装置 Download PDFInfo
- Publication number
- WO2013133336A1 WO2013133336A1 PCT/JP2013/056176 JP2013056176W WO2013133336A1 WO 2013133336 A1 WO2013133336 A1 WO 2013133336A1 JP 2013056176 W JP2013056176 W JP 2013056176W WO 2013133336 A1 WO2013133336 A1 WO 2013133336A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- color
- gamut
- correction
- reproduction
- color gamut
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
- G09G5/06—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed using colour palettes, e.g. look-up tables
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/46—Colour picture communication systems
- H04N1/56—Processing of colour picture signals
- H04N1/60—Colour correction or control
- H04N1/6058—Reduction of colour to a range of reproducible colours, e.g. to ink- reproducible colour gamut
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0606—Manual adjustment
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0693—Calibration of display systems
Definitions
- the present invention relates to a color reproduction method, a color reproduction system, a color reproduction program, and a color reproduction device, and particularly to a color image in which a color gamut to be reproduced is assumed, and to maximize the color gamut in the color image reproduction system or color image device.
- the present invention relates to a color reproduction method, a color reproduction system, a color reproduction program, and a color reproduction apparatus that can reproduce a color image having a gradation characteristic that does not fail when used in the above.
- Patent Document 1 An example of a related color reproduction method is described in Patent Document 1.
- Patent Document 1 provides a method of providing a color conversion table creation program that can easily adjust clipping and compression in accordance with user preferences. Specifically, a color conversion table is created for mapping colors in the first color gamut, which is the color gamut of the first color device, into the second color gamut, which is the color gamut of the second color device.
- the color gamut information reading step for reading the information on the first color gamut and the information on the second color gamut
- the color conversion amount input step for inputting the color conversion amount in the color gamut
- Mapping in which mapping is performed by changing a mixing ratio between mapping by clipping and mapping by compression in accordance with the input color conversion amount when mapping based on the information on the first color gamut and the information on the second color gamut And causing the computer to execute the steps.
- Patent Document 1 The method of Patent Document 1 described in the background art employs clipping for colors outside the color gamut, so that the color gradation in the original color space cannot be maintained. Specifically, a plurality of colors that are reproduced as different colors in the color gamut of the first color device are reproduced with one color on the surface of the color gamut in the second color device. Images reproduced on the second color device are not necessarily optimal.
- the technique of Patent Document 1 has a problem that the gradation in the image that is correctly reproduced by the first color device cannot be correctly reproduced by the second color device. In particular, in the second color device, the hue, saturation, and brightness cannot be corrected for any input color within the range of the color gamut of the second color device. There was a problem that it was difficult.
- an object of the present invention is to provide a color image system or color having a color gamut different from the color gamut that is assumed to be reproduced.
- An object of the present invention is to provide a color reproduction method, a color reproduction system, a color reproduction program, and a color reproduction device that allow a user to reproduce a desired color with respect to hue, saturation, and brightness for an arbitrary input color.
- the first color gamut on the input side and the second color gamut on the output side are input, and the colors in the first color gamut are used for reproduction in the second color gamut.
- Color correction is applied to the first color reproduction area determined to be inside the second color reproduction area and the first color determined to be outside the second color reproduction area
- the color gamut obtained by applying the color correction to the first color gamut and the second color gamut are displayed in a color space so that the colors constituting the gamut can be identified.
- a color existing in a color outside the second color reproduction range can be selected, a user interface for correcting the selected color is displayed, and the correction of the selected color is performed in conjunction with the operation of the user interface.
- the amount of the selected color is changed, and the selected color is changed to the second color reproduction by the operation of the user interface. If it is the surface or the inside of the gamut, the fact that the surface or the inside of the second color gamut is reached is displayed, and the first color gamut is applied to the second color by applying the correction amount.
- This is a color reproduction method for generating color conversion information to be converted into a reproduction area.
- the present invention provides means for reading a first color gamut on the input side and a second color gamut on the output side, and a color in the first color gamut for reproduction in the second color gamut.
- a color correction unit that applies color correction to the color, a color that constitutes the first color gamut determined to be inside the second color gamut, and an outside of the second color gamut.
- the color gamut obtained by applying the color correction to the first color gamut and the second color gamut are displayed in a color space so that the colors constituting the first color gamut can be identified. Displaying a color space display means, a selection means for selecting a color existing in the displayed color outside the second color gamut, and a user interface for correcting the selected color.
- the correction amount of the selected color is determined, and the selected color is When the color reproduction gamut is on or inside the color reproduction gamut, user interface correction means for displaying that the surface is inside or inside the second color reproduction gamut, and the correction amount is applied to apply the first color.
- a color reproduction system having color conversion information generating means for generating color conversion information for converting a reproduction area into the second color reproduction area.
- the present invention provides a process for inputting a first color gamut on the input side and a second color gamut on the output side, and the first color gamut for reproduction in the second color gamut.
- the color gamut obtained by applying the color correction to the first color gamut and the second color gamut are displayed in a color space so that the colors constituting the first color gamut can be identified.
- a process for enabling selection of a color that is present in a color outside the displayed second color gamut a process for displaying a user interface for correcting the selected color, In conjunction with the operation, the correction amount of the selected color is determined, and the selected color is the second color.
- the process of displaying that the surface of the color gamut is inside or inside the second color gamut and applying the correction amount the first color gamut is changed to the first color gamut.
- 2 is a program that causes a computer to execute processing for generating color conversion information to be converted into a second color gamut.
- the present invention is capable of realizing color reproduction suitable for the user's preference in a color image system or color image apparatus having a color reproduction range different from that assumed for color images.
- FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention.
- FIG. 2 is a flowchart showing the operation of the first embodiment.
- FIG. 3 is a diagram showing a specific example in which the first color reproduction area and the second color reproduction area are displayed in the color space.
- FIG. 4 is a diagram showing the concept of color correction based on the basic color of the second color correction means.
- FIG. 5 is a diagram showing a specific example of color correction based on the basic color of the second color correction means.
- FIG. 6 is a diagram illustrating a state in which the second color gamut is divided by a triangular pyramid having a measurement point as a vertex.
- FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention.
- FIG. 2 is a flowchart showing the operation of the first embodiment.
- FIG. 3 is a diagram showing a specific example in which the first color reproduction area and the second color reproduction area are displayed in the color space.
- FIG. 4 is
- FIG. 7 is a diagram showing the inside / outside determination result of the second color gamut of the color in the first color gamut.
- FIG. 8 is a diagram showing an example of a user interface for color gamut correction used by the third color correction means.
- FIG. 9 is a block diagram showing the configuration of the second exemplary embodiment of the present invention.
- FIG. 10 is a flowchart showing the operation of the second embodiment.
- FIG. 11 is a diagram showing an example of a user interface for color correction used in the fourth color correction means.
- FIG. 12 is a block diagram showing the configuration of the third exemplary embodiment of the present invention.
- FIG. 13 is a diagram showing specific color correction by the user interface according to the third embodiment of the present invention.
- FIG. 14 is a block diagram showing an embodiment of the present invention.
- FIG. 1 is a block diagram of a color reproduction system 100 according to the first embodiment.
- the color reproduction system 100 receives a first color reproduction gamut and a second color reproduction gamut, and inputs from the first color reproduction gamut to the second color reproduction gamut. Outputs color conversion information.
- the color reproduction system 100 includes a color gamut input unit 1, a color gamut display unit 2, a first color correction unit 3, a second color correction unit 4, and a third color correction unit 5.
- the color gamut correction interface means 6 is constituted.
- the color gamut input means 1 reads a first color gamut that is a color gamut on the input side and a second color gamut that is a color gamut on the output side.
- the color gamut display means 2 displays the first color gamut and the second color gamut in the color space.
- uniform color space CIELAB, HSV (H: hue, S: saturation, V: lightness) or the like is used as the color space.
- the first color correction unit 3 applies color correction in consideration of human color adaptation to the first color gamut when the reference white colors of the first color gamut and the second color gamut are different. To do.
- the second color correction unit 4 is configured so that the basic color in the first color reproduction range to which the color correction by the first color correction unit 3 is applied matches the corresponding basic color in the second color reproduction range. Apply color correction.
- the third color correction unit 5 still has an externally located color in the second color reproduction range in the first color reproduction range to which the color reproduction range conversion by the second color correction unit 4 is applied. In this case, the color correction is performed so that the color becomes the color of the surface or the inside of the second color gamut.
- the color gamut correction interface means 6 selects a color to be corrected from the first color gamut displayed on the color gamut display means 2 when applying the color correction in the third color correction means 5. And providing the user with parameters for correcting the selected color.
- the color reproduction system 100 collects a series of correction results from the first color gamut to the second color gamut. Is output as color conversion information to the color gamut.
- the overall operation of the present embodiment includes a color reproduction gamut reading step (S1), a color reproduction region color space display step (S2), and a color correction step considering color adaptation ( S3), color correction based on the basic color (S4), and color gamut correction by the user interface (S5) are performed in this order.
- S1 color reproduction gamut reading step
- S2 color reproduction region color space display step
- S3 color correction step considering color adaptation
- S4 color correction based on the basic color
- S5 color gamut correction by the user interface
- the color reproduction gamut reading step (S1) information on the first color reproduction gamut of the input color space and the second color reproduction gamut serving as the output color space is read.
- these color gamuts are provided with correspondence relationships between device colors representing colors such as RGB and CMYK and tristimulus values XYZ.
- the conversion matrix and mutual gamma characteristics of RGB and tristimulus values XYZ such as sRGB may be defined, or the color reproduced by a color image device may be actually measured.
- the color gamut input means 1 operates as in S1 above.
- the read first and second color gamuts are displayed in the color space.
- a color space such as tristimulus value XYZ, uniform color space CIELAB, HSV (H: hue, S: saturation, V: lightness) can be used.
- FIG. 3 shows an example in which the first color gamut and the second color gamut are displayed in the uniform color space CIELAB.
- the color gamut expressed by the dotted line is the first color gamut and the color gamut expressed by the solid line is the second color gamut.
- the color gamut display means 2 operates as in S2.
- color correction step (S3) considering chromatic adaptation, when the reference white color in the first color gamut is different from the reference white color in the second color gamut, color correction considering human color adaptation is performed. Applies to 1 color gamut. When the reference whites of the two color gamuts are different, or when the two reference whites are the same and the observation environment is different, humans may not perceive the same color even if the tristimulus values XYZ are matched.
- Chromatic adaptation conversion is a color correction process for compensating for such a phenomenon related to human color appearance, and various methods such as von Kries, CIECAM02, and Japanese Patent Laid-Open No. 2000-113174 have been proposed. In this embodiment, these chromatic adaptation conversions can be applied.
- the first color correction means 3 operates as in S3 above.
- FIG. 4 is a diagram showing the concept of color correction based on the basic color.
- This figure shows the state when two color gamuts whose color devices are RGB are displayed as xy chromaticity diagrams. It can be seen that the coordinate positions of R, G, and B, which are the basic colors in these two color gamuts, are different.
- the basic color in the first color gamut on the input side may be different in hue, so it is reproduced with the basic color in the second color gamut on the output side, and as it approaches an achromatic color. Reproduction is performed with a color close to the original color in the first color gamut on the input side.
- the color correction based on the basic color has an advantage that the color reproduction area on the output side can be effectively utilized.
- FIG. 5 shows the color correction for the space spanned by Y and G in the first color gamut as a two-dimensional plane a * b * .
- Y and G are Y and G in the first color gamut on the input side to which the first color correction is applied, and Yp and Gp are Y and G in the second color gamut.
- a correction vector V1 when mapping from Y (L y , a y , b y ) to Yp (L py , a py , b py ) is expressed by the following equation.
- Correction vector V1 (L py , a py , b py ) ⁇ (L y , a y , b y ) (1)
- correction vectors are calculated for the remaining basic colors (R, G, B, C, M).
- the correction target color is far from white as shown in FIG.
- Color correction is applied to increase the correction intensity as the value increases.
- a correction vector Vx to be applied to the point X in the Lab space in the first color gamut on the input side to which the first color correction is applied is calculated.
- An example of the second color correction will be described with reference to the example of FIG.
- the point X exists in the color space spanned by Y and G.
- the correction vector Vx applied to X is calculated using the correction vectors V1 and V2 calculated for Y and G.
- the hue H and saturation C of Y, G, and point X in the first color gamut on the input side to which the first color correction is applied are calculated.
- the hue angle of Y and G is dH
- the hue angle of Y and X is dH1.
- the color device value RGB in the second color gamut corresponding to L * a * b * in the uniform color space CIELAB to which the second color correction is applied is calculated.
- the correspondence between the tristimulus values XYZ and the color device values is defined as a standard color space such as sRGB or AdobeRGB in the second color reproduction range, it can be easily calculated by following a specified mathematical formula.
- the correspondence relationship between the tristimulus value XYZ and the color device value is not defined by the mathematical expression in the second color gamut, based on the correspondence relationship between the color device value RGB and the tristimulus value XYZ obtained by measurement. Calculate the color device value. A method for calculating the color device value in this case will be described.
- a triangular pyramid that satisfies the conditional expressions (4) to (6) may be searched from among all the triangular pyramids that constitute the second color gamut.
- a plurality of triangular pyramids satisfy the conditional expressions (4) to (6). In that case, any one of them A triangular pyramid may be selected.
- the color device value C in the second color gamut corresponding to the point Y is calculated.
- the color device values corresponding to the apexes A0, A1, A2, and A3 of the triangular pyramid including the point Y are C0, C1, C2, and C3, the color device value C is expressed by the following expression.
- the coefficients a, b, and c are the same coefficients as those in Expression 4.
- the second color correction means 4 operates as in S4 above.
- the color gamut correction step (S5) by the user interface will be described.
- the color correction step (S3) in consideration of chromatic adaptation and the color correction step (S4) based on the basic color there are still colors outside the second color gamut. Further, it is necessary to correct the color to the surface of the second color gamut or the internal color.
- such a color is corrected using the first and second color gamuts displayed in the color space display step (S2) of the color gamut and a user interface for correcting the color gamut.
- a color outside the second color gamut is selected.
- the inside / outside determination of the second color gamut can be easily determined by whether or not there is a triangular pyramid constituting the second color gamut that satisfies the conditional expressions (4) to (6).
- the color constituting the first color gamut determined to be outside the second color gamut is represented by that point.
- the color to be displayed is displayed so that the user can easily select a color outside the color gamut by changing the size of the point.
- a user interface for determining parameters in the color gamut correction as shown in FIG. 8 is presented to determine the parameters.
- LCH calculated from (L * , a * , b * ) of the selected color is displayed.
- L represents lightness and is L * .
- C represents saturation and H represents hue, which is calculated by the following equation.
- the hue H is expressed in radians, but when expressed as an angle H ′, it is further calculated as follows.
- each component of the selected LCH is corrected while being controlled by a slide bar so that the color becomes the surface color or the internal color of the second color gamut. If the color to be corrected becomes the surface of the second color gamut or the internal color during correction, the color and size representing the point are linked as shown in FIG. Change.
- the color reversal phenomenon can be avoided by applying the correction amount for the selected color to the adjacent colors in such a manner that the correction amount is gradually weakened and interlocking the correction. Further, by simultaneously selecting and correcting a plurality of colors existing around the color to be corrected, the work efficiency in this step is also improved.
- the color gamut correction step (S5) by the user interface ends.
- the third color correction means 5 operates as in S5 described above, and the color gamut correction interface means 6 is realized by a user interface shown in FIG. 8, for example.
- color correction by the user interface In color correction by the user interface, clipping is not applied to colors outside the color gamut on the output side, and color inversion does not occur, so that color reproduction with maintained gradation can be realized. Furthermore, since it is based on color correction by the user, color reproduction suitable for the user's preference can be realized.
- color conversion information from the first color gamut to the second color gamut is generated.
- the color conversion information from the first color gamut to the second color gamut is, for example, a color conversion table that records the correspondence between the color device values in the input color space and the color device values in the output color space. Can be output.
- the color reproduction gamut on the output side is configured by the configuration of the color correction step based on the basic color and the color gamut correction step by the user interface Can be used effectively, and color reproduction with gradation can be maintained. Furthermore, color reproduction that matches the user's preference can be realized.
- color reproduction with a maintained gradation can be realized in a color image system or color image apparatus having a color reproduction range different from the color reproduction range assumed for a color image. This is because the color gamut of the color image system or the color image device is effectively used, and in particular, clipping is not applied to colors outside the color gamut in the process of color reproduction.
- a color reproduction system 200 that is the best mode for carrying out the second invention of the present invention has a fourth color correction means 7 and a color correction interface means 8 added to the color reproduction system 100. It becomes the composition.
- the fourth color correction unit 7 applies the first to third color corrections to the first color gamut so as to reproduce the color corrected so that it can be reproduced in the second color gamut. Providing color correction that matches user preferences.
- the color correction interface unit 8 selects a color to be corrected when applying the color correction in the fourth color correction unit 7 and provides the user with a parameter for correcting the selected color.
- the overall operation of the present embodiment is as follows: a color gamut reading step (S1), a color gamut color space display step (S2), and a color correction step considering color adaptation ( S3), color correction based on basic colors (S4), color gamut correction by user interface (S5), and specific color correction by user interface (S6) are performed in this order.
- a color gamut reading step (S1) a color gamut color space display step (S2)
- a color correction step considering color adaptation ( S3), color correction based on basic colors (S4), color gamut correction by user interface (S5), and specific color correction by user interface (S6) are performed in this order.
- S3 color adaptation
- S4 color correction based on basic colors
- S5 color gamut correction by user interface
- S6 specific color correction by user interface
- the first to third color corrections are applied to the first color gamut so as to be reproduced in the second color gamut.
- color correction is applied to meet the user's preference.
- FIG. 11 shows an example of a user interface for color correction used in S6.
- the left side of FIG. 11 shows the first and second color gamuts displayed by the color gamut display means 2, and by applying the first to third color corrections to the first color gamut.
- An arbitrary color in the first color gamut represents a state that can be reproduced in the second color gamut.
- the color constituting the first color gamut displayed on the color gamut display means 2 is selected by operating the computer with a mouse. From the L * a * b * value of the selected color, the hue, saturation, and brightness of that color are calculated and plotted on the graph represented by hue-saturation on the color correction interface on the right side of FIG.
- the lightness of the graph expressed by hue-saturation is expressed by the same lightness as the selected color.
- the hue and saturation of the selected color can be corrected by moving the plot points on the graph expressed by this hue-saturation.
- the brightness of the selected color can be corrected by changing the brightness adjustment bar.
- the correction result in the color correction interface is reflected in the first color gamut.
- only the selected color may be reflected or may be reflected in the surrounding colors of the selected color.
- color correction without any sense of incongruity can be realized by adjusting the correction amount based on the color difference, hue difference, saturation difference, or brightness difference from the selected color. .
- the fourth color correction means 7 operates as in S6 above, and the color correction interface means 8 provides an interface for color correction performed by the fourth color correction means 7 as shown in FIG. .
- the specific color correction step configured by the user interface can realize color reproduction that more suits the user's preference when reproducing the color in the color reproduction area on the input side in the color reproduction area on the output side.
- a color reproduction system 300 has a configuration in which evaluation image display means 9 is added to the color reproduction system 200.
- the evaluation image display means 9 can select a color to be corrected from the presented evaluation image and can confirm the effect of the color correction as an image when performing color correction to meet the user's preference. Provide a more convenient color correction function.
- the basic operation is the same as that shown in the flowchart of FIG. 10, except that the method of selecting a color to be corrected in the specific color correction (S6) by the user interface is different.
- the newly added evaluation image display means 9 is used. Will be described.
- the evaluation image display means 9 displays the evaluation image with a color that reflects the color conversion information from the first color reproduction area to the second color reproduction area, and has the second color reproduction area.
- the imaging device Present to the imaging device.
- various images such as a person image, a landscape image, and a CG image can be prepared and selected.
- the user selects the color to be corrected from the presented evaluation image.
- the color correction for the selected color is as described in the specific color correction (S6) by the user interface.
- the effect of this embodiment is that the color correction can be selected from the presented evaluation image and the effect of the color correction can be confirmed as an image when color correction is performed so as to meet the user's preference. Therefore, more convenient color correction can be realized.
- the color reproduction systems 100 to 300 in the first to third embodiments described above can also be realized as a program that runs on a computer. Further, as shown in FIG. 14, the color reproduction device 400 can be implemented.
- the color reproduction device 400 receives the first color reproduction range and the second color reproduction range, and outputs color conversion information from the first color reproduction range to the second color reproduction range.
- Area input means 1 color reproduction area display means 2, first color correction means 3, second color correction means 4, third color correction means 5 and color reproduction area correction interface means 6, color reproduction area storage memory 10 It is composed of
- Each of the color gamut input means 1, color gamut display means 2, first color correction means 3, second color correction means 4, third color correction means 5 and color gamut correction interface means 6 includes: The same operation as that described in the color reproduction system 100 is performed.
- the color reproduction area storage memory 10 is a memory for storing the first color reproduction area and the second color reproduction area by the color reproduction area input means 1.
- the first color reproduction area stored in the color reproduction area storage memory 10 reflects the correction results of the first color correction means 3, the second color correction means 4, and the third color correction means 5 each time. .
- ⁇ Appendix 3> Displaying colors constituting the first color gamut based on the color conversion information, The displayed color can be selected, Display the parameters of the selected color; The color reproduction method according to appendix 1 or appendix 2, wherein the color after the parameter is changed is displayed by changing the displayed parameter.
- the color correction includes a first color correction considering color adaptation based on a reference white color in the first color gamut and the second color gamut, the first color gamut, and the first color gamut.
- ⁇ Supplementary Note 8> means for reading the first color gamut on the input side and the second color gamut on the output side; Color correction means for applying color correction to colors in the first color gamut in order to reproduce in the second color gamut; A color constituting the first color reproduction gamut determined to be inside the second color reproduction gamut and a color constituting the first color reproduction gamut determined to be outside the second color reproduction gamut.
- Color space display means for displaying in a color space the color gamut obtained by applying the color correction to the first color gamut and the second color gamut so that they can be identified; Selecting means for selecting a color that exists in the displayed color outside the second color reproduction range; A user interface for correcting the selected color is displayed, and a correction amount of the selected color is determined in conjunction with an operation of the user interface, and the selected color is the second color reproduction.
- User interface correction means for displaying that the surface of the second color gamut is inside or inside the area when the surface is inside or inside the area;
- a color reproduction system comprising color conversion information generation means for generating color conversion information for converting the first color reproduction area into the second color reproduction area by applying the correction amount.
- ⁇ Supplementary Note 10> Means for displaying a color constituting the first color reproduction area based on the color conversion information; Means for selecting the displayed color; Means for variably displaying the selected color parameter; The color reproduction system according to appendix 8 or appendix 9, comprising means for displaying the color after changing the parameter.
- Evaluation image display means for displaying an evaluation image based on the color conversion information on the image device having the second color reproduction range;
- the color correction includes a first color correction considering color adaptation based on a reference white color in the first color gamut and the second color gamut, the first color gamut, and the first color gamut.
- the color reproduction system according to any one of appendix 8 to appendix 11, which is a second color correction for matching basic colors in the second color gamut.
- ⁇ Supplementary Note 14> The supplementary note 12 or the supplementary note 13, wherein the second color correction unit performs color correction on a color other than the basic color from color correction information for two basic colors sandwiching a color other than the basic color. Color reproduction system.
- ⁇ Supplementary Note 18> Processing for displaying an evaluation image based on the color conversion information on the image device having the second color reproduction range; 18.
- the color correction includes a first color correction considering color adaptation based on a reference white color in the first color gamut and the second color gamut, the first color gamut, and the first color gamut.
- the program according to any one of appendix 15 to appendix 18, which is a second color correction for matching the basic colors in the second color reproduction range.
- ⁇ Supplementary note 20> The program according to supplementary note 19, wherein the second color correction process is a process of performing color correction to increase the correction strength as the saturation increases for colors other than the basic color.
- ⁇ Supplementary Note 22> Input the first color gamut on the input side and the second color gamut on the output side where the correspondence between the color device value and the tristimulus value is known, Generating a first color correction for converting a basic color in the first color gamut to a desired color in the second color gamut; Generating a second color correction for correcting a color other than the basic color in the first color gamut; Applying the first color correction and the second color correction to the first color gamut to generate a corrected color gamut; Applying a third color correction with a user interface that performs color correction in a uniform color space for any color in the corrected color gamut, A color reproduction method for generating color conversion information to a color in the second color gamut corresponding to an arbitrary color in the first color gamut.
- ⁇ Supplementary note 23> The supplementary note 22, wherein, in the first color correction, as the desired color in the second color gamut, a color having the same basic color or color device value in the first color gamut is selected. Color reproduction method.
- the color correction information for the color to be corrected is the color correction information obtained by the first color correction for the two basic colors sandwiching the color to be corrected.
- a color to be corrected by the third color correction is selected from the colors of the evaluation image presented on the color image device having the second color gamut.
- the color reproduction method according to appendix 25 is selected from the colors of the evaluation image presented on the color image device having the second color gamut.
- the present invention can be applied to a color image reproduction system having a different color gamut or a color reproduction system, a color reproduction program, and a color reproduction apparatus between color image apparatuses. Further, the present invention can be applied to a function for creating a color conversion table between color image reproduction systems or color image apparatuses having different color gamuts.
- color reproduction area input means 2 color reproduction area display means 3 first color correction means 4 second color correction means 5 third color correction means 6 color reproduction area correction interface means 7 fourth color correction means 8 color correction Interface means 9
- Evaluation image display means 10 Color reproduction area storage memory 100 Color reproduction system 200 Color reproduction system 300 Color reproduction system 400 Color reproduction device
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
- Image Processing (AREA)
- Color Image Communication Systems (AREA)
Abstract
Description
本発明の第1の実施の形態について、図面を参照して詳細に説明する。
補正ベクトルV1=(Lpy, apy, bpy)-(Ly, ay, by) (1)
同様にして、残りの基本色(R, G, B, C, M)についても補正ベクトルを算出する。
次に、色相成分に寄与する補正ベクトルVhを算出する。
Vh = (1-dH1/dH)・V1 + (dH1/dH)・V2 (2)
そして、補正ベクトルVhに彩度成分の寄与を反映させて、点Xに作用する補正ベクトルVxを算出する。
Vx=Cx/C・Vh (3)
均等色空間CIELABにおける点Xに補正ベクトルVxを適用した結果が、基本色以外の色に対する第2の色補正の結果になる。
は、CIELAB色空間における原点からの位置ベクトルを表す。
ここで、係数a、b、cは、式4における係数と同じ係数である。
ここで、色相Hはラジアンで表現されているが、角度H’で表現する場合には、さらに以下のように計算する。
本発明の第2の実施の形態について図面を参照して詳細に説明する。
<第3の実施の形態>
本発明の第3の実施の形態について図面を参照して詳細に説明する。
前記第2の色再現域で再現するために、前記第1の色再現域の色に対して色補正を適用し、
前記第2の色再現域の内部と判定された第1の色再現域を構成する色と前記第2の色再現域の外部と判定された第1の色再現域を構成する色とを識別できるように、前記第1の色再現域に前記色補正を適用した色再現域と前記第2の色再現域とを色空間に表示し、
前記表示された第2の色再現域外の色に存在する色を選択可能とし、
前記選択された色を補正するためのユーザーインタフェースを表示し、
前記ユーザーインタフェースの操作に連動して、前記選択された色の補正量を決定し、
前記ユーザーインタフェースの操作により、前記選択された色が前記第2の色再現域の表面もしくは内部になった場合には、前記第2の色再現域の表面もしくは内部なったことを表示し、
前記補正量を適用して、第1の色再現域を前記第2の色再現域に変換する色変換情報を生成する
色再現方法。
付記1に記載の色再現方法。
前記表示された色を選択可能とし、
前記選択された色のパラメータを表示し、
前記表示されたパラメータを変更することによって、前記パラメータの変更後の色を表示する
付記1又は付記2に記載の色再現方法。
表示された評価画像から補正する色を選択する
付記1から付記3のいずれかに記載の色再現方法。
付記1から付記4のいずれかに記載の色再現方法。
付記5に記載の色再現方法。
付記5又は付記6に記載の色再現方法。
前記第2の色再現域で再現するために、前記第1の色再現域の色に対して色補正を適用する色補正手段と、
前記第2の色再現域の内部と判定された第1の色再現域を構成する色と、前記第2の色再現域の外部と判定された第1の色再現域を構成する色とを識別できるようにして、前記第1の色再現域に前記色補正を適用した色再現域と前記第2の色再現域とを色空間に表示する色空間表示手段と、
前記表示された第2の色再現域外の色に存在する色を選択する選択手段と、
前記選択された色を補正するためのユーザーインタフェースを表示し、前記ユーザーインタフェースの操作に連動して、前記選択された色の補正量を決定し、前記選択された色が前記第2の色再現域の表面もしくは内部になった場合には、前記第2の色再現域の表面もしくは内部なったことを表示するユーザーインタフェース補正手段と、
前記補正量を適用して、第1の色再現域を前記第2の色再現域に変換する色変換情報を生成する色変換情報生成手段と
を有する色再現システム。
付記8に記載の色再現システム。
前記表示された色を選択する手段と、
前記選択された色のパラメータを変更可能に表示する手段と、
パラメータの変更後の色を表示する手段と
を有する付記8又は付記9に記載の色再現システム。
前記評価画像から補正する色を選択する選択手段と
を有する
付記8から付記10のいずれかに記載の色再現システム。
付記8から付記11のいずれかに記載の色再現システム。
付記12に記載の色再現システム。
付記12又は付記13に記載の色再現システム。
前記第2の色再現域で再現するために、前記第1の色再現域の色に対して色補正を適用する処理と、
前記第2の色再現域の内部と判定された第1の色再現域を構成する色と、前記第2の色再現域の外部と判定された第1の色再現域を構成する色とを識別できるようにして、前記第1の色再現域に前記色補正を適用した色再現域と前記第2の色再現域とを色空間に表示する処理と、
前記表示された第2の色再現域外の色に存在する色を選択可能にする処理と、
前記選択された色を補正するためのユーザーインタフェースを表示する処理と、
前記ユーザーインタフェースの操作に連動して、前記選択された色の補正量を決定し、前記選択された色が前記第2の色再現域の表面もしくは内部になった場合には、前記第2の色再現域の表面もしくは内部なったことを表示する処理と、
前記補正量を適用して、第1の色再現域を前記第2の色再現域に変換する色変換情報を生成する処理と
をコンピュータに実行させるプログラム。
付記15に記載のプログラム。
前記表示された色を選択する処理と、
前記選択された色のパラメータを変更可能に表示する処理と、
パラメータの変更後の色を表示する処理と
を有する付記15又は付記16に記載のプログラム。
前記評価画像から補正する色を選択する処理と
を有する
付記15から付記17のいずれかに記載のプログラム。
付記15から付記18のいずれかに記載のプログラム。
付記19に記載のプログラム。
付記19又は付記20に記載のプログラム。
前記第1の色再現域における基本色を前記第2の色再現域における所望の色に変換するための第1の色補正を生成し、
前記第1の色再現域における基本色以外の色を補正するための第2の色補正を生成し、
前記第1の色補正と前記第2の色補正とを、前記第1の色再現域に適用して補正色再現域を生成し、
前記補正色再現域における任意の色について均等色空間で色補正を施すユーザーインタフェースを伴った第3の色補正を適用し、
前記第1の色再現域の任意の色に対応する前記第2の色再現域における色への色変換情報を生成する
色再現方法。
付記22に記載の色再現方法。
付記22又は付記23のいずれかに記載の色再現方法。
付記22から付記24のいずれかに記載の色再現方法。
付記25に記載の色再現方法。
2 色再現域表示手段
3 第1の色補正手段
4 第2の色補正手段
5 第3の色補正手段
6 色再現域補正インターフェース手段
7 第4の色補正手段
8 色補正インターフェース手段
9 評価画像表示手段
10 色再現域格納メモリ
100 色再現システム
200 色再現システム
300 色再現システム
400 色再現装置
Claims (10)
- 入力側の第1の色再現域と出力側の第2の色再現域とを入力とし、
前記第2の色再現域で再現するために、前記第1の色再現域の色に対して色補正を適用し、
前記第2の色再現域の内部と判定された第1の色再現域を構成する色と前記第2の色再現域の外部と判定された第1の色再現域を構成する色とを識別できるように、前記第1の色再現域に前記色補正を適用した色再現域と前記第2の色再現域とを色空間に表示し、
前記表示された第2の色再現域外の色に存在する色を選択可能とし、
前記選択された色を補正するためのユーザーインタフェースを表示し、
前記ユーザーインタフェースの操作に連動して、前記選択された色の補正量を決定し、
前記ユーザーインタフェースの操作により、前記選択された色が前記第2の色再現域の表面もしくは内部になった場合には、前記第2の色再現域の表面もしくは内部なったことを表示し、
前記補正量を適用して、第1の色再現域を前記第2の色再現域に変換する色変換情報を生成する
色再現方法。 - 前記選択された色に対する前記補正量に応じて、前記選択された色に隣接する色も補正する
請求項1に記載の色再現方法。 - 前記色変換情報に基づいて前記第1の色再現域を構成する色を表示し、
前記表示された色を選択可能とし、
前記選択された色のパラメータを表示し、
前記表示されたパラメータを変更することによって、前記パラメータの変更後の色を表示する
請求項1又は請求項2に記載の色再現方法。 - 前記第2の色再現域を有する画像装置上に、前記色変換情報に基づいた評価画像を表示し、
表示された評価画像から補正する色を選択する
請求項1から請求項3のいずれかに記載の色再現方法。 - 前記色補正は、前記第1の色再現域と前記第2の色再現域における基準白色に基づく色順応を考慮した第1の色補正と、前記第1の色再現域と前記第2の色再現域における基本色を一致させる第2の色補正とである
請求項1から請求項4のいずれかに記載の色再現方法。 - 入力側の第1の色再現域と出力側の第2の色再現域を読み込む手段と、
前記第2の色再現域で再現するために、前記第1の色再現域の色に対して色補正を適用する色補正手段と、
前記第2の色再現域の内部と判定された第1の色再現域を構成する色と、前記第2の色再現域の外部と判定された第1の色再現域を構成する色とを識別できるようにして、前記第1の色再現域に前記色補正を適用した色再現域と前記第2の色再現域とを色空間に表示する色空間表示手段と、
前記表示された第2の色再現域外の色に存在する色を選択する選択手段と、
前記選択された色を補正するためのユーザーインタフェースを表示し、前記ユーザーインタフェースの操作に連動して、前記選択された色の補正量を決定し、前記選択された色が前記第2の色再現域の表面もしくは内部になった場合には、前記第2の色再現域の表面もしくは内部なったことを表示するユーザーインタフェース補正手段と、
前記補正量を適用して、第1の色再現域を前記第2の色再現域に変換する色変換情報を生成する色変換情報生成手段と
を有する色再現システム。 - 前記ユーザーインタフェース補正手段は、前記選択された色に対する補正量に応じて、前記選択された色に隣接する色も補正する
請求項6に記載の色再現システム。 - 前記色変換情報に基づいて前記第1の色再現域を構成する色を表示する手段と、
前記表示された色を選択する手段と、
前記選択された色のパラメータを変更可能に表示する手段と、
パラメータの変更後の色を表示する手段と
を有する請求項6又は請求項7に記載の色再現システム。 - 前記第2の色再現域を有する画像装置上に、前記色変換情報に基づいた評価画像を表示する評価画像表示手段と、
前記評価画像から補正する色を選択する選択手段と
を有する
請求項6から請求項8のいずれかに記載の色再現システム。 - 入力側の第1の色再現域と出力側の第2の色再現域とを入力する処理と、
前記第2の色再現域で再現するために、前記第1の色再現域の色に対して色補正を適用する処理と、
前記第2の色再現域の内部と判定された第1の色再現域を構成する色と、前記第2の色再現域の外部と判定された第1の色再現域を構成する色とを識別できるようにして、前記第1の色再現域に前記色補正を適用した色再現域と前記第2の色再現域とを色空間に表示する処理と、
前記表示された第2の色再現域外の色に存在する色を選択可能にする処理と、
前記選択された色を補正するためのユーザーインタフェースを表示する処理と、
前記ユーザーインタフェースの操作に連動して、前記選択された色の補正量を決定し、前記選択された色が前記第2の色再現域の表面もしくは内部になった場合には、前記第2の色再現域の表面もしくは内部なったことを表示する処理と、
前記補正量を適用して、第1の色再現域を前記第2の色再現域に変換する色変換情報を生成する処理と
をコンピュータに実行させるプログラム。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/383,448 US11205399B2 (en) | 2012-03-08 | 2013-03-06 | Color reproduction method, color reproduction system, color reproduction program, and color reproduction apparatus |
JP2014503518A JP6008147B2 (ja) | 2012-03-08 | 2013-03-06 | 色再現方法、色再現システム、色再現プログラムおよび色再現装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012-052108 | 2012-03-08 | ||
JP2012052108 | 2012-03-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013133336A1 true WO2013133336A1 (ja) | 2013-09-12 |
Family
ID=49116809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/056176 WO2013133336A1 (ja) | 2012-03-08 | 2013-03-06 | 色再現方法、色再現システム、色再現プログラムおよび色再現装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US11205399B2 (ja) |
JP (1) | JP6008147B2 (ja) |
WO (1) | WO2013133336A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111653232A (zh) * | 2020-06-05 | 2020-09-11 | 广州视源电子科技股份有限公司 | 发光二极管led屏色域校准方法及装置 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20160059240A (ko) * | 2014-11-18 | 2016-05-26 | 삼성전자주식회사 | 색 재현 영역을 표시하는 방법 및 장치 |
EP3029926A1 (en) * | 2014-12-02 | 2016-06-08 | Thomson Licensing | Method and apparatus for interactive color manipulation |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007081480A (ja) * | 2005-09-09 | 2007-03-29 | Canon Inc | 色処理方法およびその装置 |
JP2007081733A (ja) * | 2005-09-13 | 2007-03-29 | Canon Inc | 画像処理方法、画像処理装置 |
JP2007259124A (ja) * | 2006-03-23 | 2007-10-04 | Konica Minolta Business Technologies Inc | 色変換テーブルの作成方法、情報作成装置、記録媒体及び画像処理装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USH1506H (en) * | 1991-12-11 | 1995-12-05 | Xerox Corporation | Graphical user interface for editing a palette of colors |
JP2959385B2 (ja) * | 1993-08-23 | 1999-10-06 | ブラザー工業株式会社 | カラー出力用データの色値データ変換装置 |
US20030184557A1 (en) * | 2002-03-26 | 2003-10-02 | Senfar Wen | Interactive method and apparatus for managing color gamut mapping |
JP2005059360A (ja) * | 2003-08-11 | 2005-03-10 | Canon Inc | 色分解データ生成方法および画像処理装置 |
JP2007274585A (ja) * | 2006-03-31 | 2007-10-18 | Canon Inc | 色処理装置 |
JP4802981B2 (ja) | 2006-11-02 | 2011-10-26 | コニカミノルタエムジー株式会社 | 色変換テーブル作成プログラム、色変換テーブル作成装置及び色変換テーブル作成システム |
US8334876B2 (en) * | 2008-05-22 | 2012-12-18 | Sanyo Electric Co., Ltd. | Signal processing device and projection display apparatus |
KR101058612B1 (ko) * | 2009-12-28 | 2011-08-22 | 박원주 | 멀티터치가 가능한 터치스크린을 이용한 화상의 색 보정 방법 |
KR20130076132A (ko) * | 2011-12-28 | 2013-07-08 | 삼성전자주식회사 | 디스플레이 장치 및 영상 표시 방법 |
-
2013
- 2013-03-06 JP JP2014503518A patent/JP6008147B2/ja active Active
- 2013-03-06 WO PCT/JP2013/056176 patent/WO2013133336A1/ja active Application Filing
- 2013-03-06 US US14/383,448 patent/US11205399B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007081480A (ja) * | 2005-09-09 | 2007-03-29 | Canon Inc | 色処理方法およびその装置 |
JP2007081733A (ja) * | 2005-09-13 | 2007-03-29 | Canon Inc | 画像処理方法、画像処理装置 |
JP2007259124A (ja) * | 2006-03-23 | 2007-10-04 | Konica Minolta Business Technologies Inc | 色変換テーブルの作成方法、情報作成装置、記録媒体及び画像処理装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111653232A (zh) * | 2020-06-05 | 2020-09-11 | 广州视源电子科技股份有限公司 | 发光二极管led屏色域校准方法及装置 |
CN111653232B (zh) * | 2020-06-05 | 2021-11-16 | 广州视源电子科技股份有限公司 | 发光二极管led屏色域校准方法及装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2013133336A1 (ja) | 2015-07-30 |
JP6008147B2 (ja) | 2016-10-19 |
US20150042673A1 (en) | 2015-02-12 |
US11205399B2 (en) | 2021-12-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR100834762B1 (ko) | 이 기종간 색역 사상 방법 및 장치 | |
JP4209439B2 (ja) | 画像処理装置、画像処理システム、画像処理方法、画像処理プログラムおよび集積回路装置 | |
US9501842B2 (en) | Image processing apparatus and image processing method with color correction of observation target | |
KR101348369B1 (ko) | 디스플레이 장치의 색 변환 방법 및 장치 | |
US20140002481A1 (en) | Method for converting data, display device, computing device and program incorporating same, and method for optimising coefficients and device and program incorporating same | |
JP4523667B2 (ja) | 映像表示装置 | |
JP4779843B2 (ja) | 色変換ルックアップテーブル作成装置、色変換ルックアップテーブル作成方法、及び色変換ルックアップテーブル作成プログラム | |
JPWO2005048583A1 (ja) | 色補正装置および色補正方法 | |
WO2005057941A1 (ja) | プロジェクタの色補正方法 | |
JP6156361B2 (ja) | 色再現方法、色再現システム、色再現プログラムおよび色再現装置 | |
JP2004356930A (ja) | 色彩調整装置及びその方法 | |
US8427696B2 (en) | Color processing method and apparatus thereof | |
JP2009159580A (ja) | 画質評価装置及びその方法 | |
JP4656006B2 (ja) | 色変換装置及び色変換プログラム | |
US7999826B2 (en) | Color conversion device, color conversion method, color conversion program, recording medium recording color conversion program, image processing device, and image display device | |
JP5460805B1 (ja) | 画像表示装置 | |
JP4752535B2 (ja) | 画像処理装置、画像処理方法、及び画像処理プログラム | |
JP6008147B2 (ja) | 色再現方法、色再現システム、色再現プログラムおよび色再現装置 | |
JP3987215B2 (ja) | 色変換装置 | |
JP2020005136A (ja) | 画像処理装置、画像処理方法、及びプログラム | |
JP2009284107A (ja) | 色処理装置およびプログラム | |
JP2017135683A (ja) | 生成装置、および、コンピュータプログラム | |
JPH10322561A (ja) | 色変換装置 | |
JP4582336B2 (ja) | 色処理装置、色変換テーブル作成装置、画像処理装置 | |
KR101122615B1 (ko) | 색상 보정 장치 및 색상 보정 방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13758517 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2014503518 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14383448 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13758517 Country of ref document: EP Kind code of ref document: A1 |