WO2006095496A1 - 色変換装置、プログラム、画像表示装置及び携帯型端末装置 - Google Patents
色変換装置、プログラム、画像表示装置及び携帯型端末装置 Download PDFInfo
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- 239000011159 matrix material Substances 0.000 claims abstract description 39
- 238000006243 chemical reaction Methods 0.000 claims description 101
- 239000003086 colorant Substances 0.000 claims description 12
- 238000004590 computer program Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 21
- 238000000034 method Methods 0.000 description 13
- 238000004364 calculation method Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/643—Hue control means, e.g. flesh tone control
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/001—Texturing; Colouring; Generation of texture or colour
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2003—Display of colours
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- H04N1/6075—Corrections to the hue
-
- 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
- H04N1/62—Retouching, i.e. modification of isolated colours only or in isolated picture areas only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/67—Circuits for processing colour signals for matrixing
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/06—Colour space transformation
Definitions
- Color conversion device program, image display device, and portable terminal device
- the present invention relates to a color conversion device and a computer program for converting color image data in accordance with the characteristics of the color image output device when color image data is output by the color image output device, and the color conversion thereof.
- the present invention relates to an image display device including the device and a portable terminal device including the image display device as a display unit.
- the display screen of a portable terminal has many uses that are not so much conscious of the color of the original image, such as creating text data such as e-mail and enjoying a CGI game.
- applications such as viewing still images and moving images are increasing.
- the spread of mobile terminals capable of receiving TV broadcasts has started, and the demand for image quality of the display screen of mobile terminals is increasing.
- a liquid crystal display device using a white LED in which a blue LED having a peak in a short wavelength region is covered with a yellow phosphor as a light source is used for a display screen of a portable terminal.
- Such a liquid crystal display device has characteristics suitable for a portable terminal that consumes little power and can be easily miniaturized, but has a problem that a color reproduction range in a region other than blue is narrow.
- FIG. 1 An example of the color reproduction range of a liquid crystal display device for a portable terminal using a white LED as a light source is shown by a solid line in FIG.
- the red and green color reproduction range is extremely narrow.
- the green primary color point is considerably in the yellow direction. For this reason, if an image created for the NTSC color reproduction range is decoded into an RGB signal and displayed as it is, for example, green leaves may appear as dead leaves and green grasslands as dead fields.
- R, G, and B are RGB signals indicating red, green, and blue components before conversion
- R ′, G ′, and B ′ are converted RGB signals.
- Equation (2) For example, in a display device having a color reproduction range indicated by a solid line in FIG. 14, when the hue is matched with the NTSC color reproduction range indicated by the broken line, the red primary color point is in the green direction, the green primary color point is in the blue direction, Each of the primary color points may be rotated in the red direction.
- Equation (2) An example of a conversion equation that matches the hue is shown in Equation (2).
- Figure 21 shows the color reproduction range and hue axis after the conversion of equation (2) for a display device with the color reproduction range shown by the solid line in Fig. 19.
- the inside of the thick triangle is the color reproduction range after conversion, and the solid line in the color reproduction range is the hue axis.
- the hue can be adjusted to the NTSC standard by the conversion of equation (2).
- FIG. 20 shows a configuration example of a three-dimensional matrix calculator that realizes the above conversion.
- Nine multipliers 13 00 to 1308 and three adders 1309 to 1311 can be configured relatively easily.
- the color reproduction range is greatly narrowed by the color conversion.
- a display device for a mobile terminal using a white LED has a problem that if the original color reproduction range is narrow and conversion is performed, the color reproduction range becomes extremely narrow.
- the hue can be adjusted without narrowing the color reproduction range by the matrix calculation of Expression (3).
- FIG. 22 shows a color conversion apparatus that realizes hue adjustment according to Expression (3).
- 181 calculates and outputs the maximum value 13 and minimum value a of the input RGB signal and outputs each data.
- a j8 calculator that generates and outputs an identification code that identifies the data
- 182 is the hue data that calculates the hue data from the RGB signal and the output from the ⁇ ⁇ calculator 181!:, G, b, y, m, c
- a data calculator, 183 is a polynomial calculator, 184 is a matrix calculator, 185 is a coefficient generator, and 186 is a synthesizer.
- FIG. 23 An example of hue adjustment by the color conversion device of FIG. 22 is shown in FIG.
- the thick triangle in the figure is the color reproduction range of the image reproduction device
- the dashed triangle in the figure is the target color reproduction range for hue adjustment.
- An image reproduction device is a display device such as a monitor.
- the direction of the straight line extending outward from the center of the triangle is the hue of each color.
- Fig. 23 (A) shows the color reproduction range and hue before hue adjustment
- Fig. 23 (B) shows the color reproduction range and hue after hue adjustment. While the color reproduction range remains the same, the hue changes in accordance with the target color reproduction range.
- Patent Document 1 Japanese Patent No. 3432468
- the present invention has been made in view of the above problems, and corrects a hue shift without narrowing the color reproduction range, and further does not require a large amount of memory resources with a small calculation amount and circuit scale. It is an object of the present invention to provide an apparatus, a computer program, an image display device including the color conversion device, and a portable terminal device including the image display device as display means.
- a color conversion device that converts first color information to generate second color information, and the first and second color information can be controlled independently. It is classified by the size relationship between the data of multiple colors, the size relationship between multiple color data included in the first color information, and the addition of the result of multiplying multiple color data by an arbitrary constant. It is characterized in that different color conversion is possible for each area.
- the second technical means is a color conversion device that converts the first color information to generate the second color information, and the first and second color information can be controlled independently. It is composed of three color data, and the size relationship between the three color data included in the first color information and the other two data except the minimum value and minimum value of the three color data are arbitrary. It is characterized by enabling different color conversions for each of the 12 areas, which are classified according to the magnitude relationship with the addition of the result of multiplying by a constant.
- the third technical means is classified according to the magnitude relationship between the minimum value of the three color data in the 12 areas and the addition result obtained by multiplying the other two data by an arbitrary constant respectively.
- at least 3 out of 2 adjacent 6 areas are characterized by the same color conversion.
- a fourth technical means is the second or third technical means characterized in that the color conversion for each area is performed by a three-dimensional matrix operation.
- the fifth technical means is a computer program for performing color conversion for converting the first color information to generate the second color information, wherein the first and second color information are independent of each other. It consists of multiple color data that can be controlled, and the magnitude relationship between the multiple color data included in the first color information and the magnitude relationship with the addition of the result of multiplying multiple color data by an arbitrary constant. The feature is that different color conversions are possible for each area classified by.
- a sixth technical means is a computer program for performing color conversion for converting the first color information to generate the second color information, wherein the first and second color information are independent of each other. It consists of three color data that can be controlled, and the size relationship between the three color data included in the first color information, and the other two data except the minimum and minimum values of the three color data are optional. For each of the 12 areas classified by the magnitude relationship with the addition of the result of multiplying the constants It is characterized by enabling different color conversions.
- a seventh technical means is an image display device comprising the color conversion device described in any one of the first to fourth technical means.
- An eighth technical means is a portable terminal device comprising the image display device described in the seventh technical means as a display means.
- the color conversion device of the present invention is a color conversion device that generates first color information by converting first color information, and the first and second color information can be controlled independently. Data power of multiple colors, and the magnitude relationship between the multiple color data included in the first color information and the addition of the result obtained by multiplying the multiple color data by an arbitrary constant. Different color conversions are possible for each area classified by. Thereby, it is possible to provide a color conversion apparatus that corrects a hue shift without narrowing the color reproduction range.
- the first and second color information is composed of three color data that can be controlled independently, and the magnitude relationship between the three color data included in the first color information is Also, different color conversions are possible for each of the 12 areas, which are classified according to the magnitude relationship between the minimum value of the data and the addition of the result obtained by multiplying each of the other two data by an arbitrary constant. As a result, it is possible to provide a color conversion device that corrects a hue shift without narrowing the color reproduction range.
- the color conversion for each area can be reduced in size by reducing the circuit scale by performing a three-dimensional matrix operation.
- the first and second color information is a data power of a plurality of colors that can be controlled independently, the magnitude relationship between the data of a plurality of colors included in the first color information, and Different color conversion is possible for each area classified by the magnitude relationship with the addition of the result obtained by multiplying the plurality of color data by an arbitrary constant. This makes the color Hue shift can be corrected without narrowing the reproduction range.
- the computer program according to the present invention includes three color data that can be controlled independently of the first and second color information, and the size of the three color data included in the first color information is small or large. Different color conversion is possible for each of the 12 areas, which are classified according to the relationship and the magnitude relationship between the minimum value of the data and the addition of the result obtained by multiplying the other two data by arbitrary constants. Thereby, the hue shift can be corrected without narrowing the color reproduction range.
- the image display device of the present invention it is possible to correct a hue shift without narrowing the color reproduction range, and to provide a color conversion device that can be reduced in size by reducing the circuit scale. Visible images can be displayed using a wide color reproduction range inherent in image display devices with a sense of incongruity.
- the portable terminal device of the present invention by providing the image display device, the inherent color reproduction range of the image display device in which a sense of incongruity due to hue shift is eliminated while suppressing circuit scale and power consumption. A wide range of fresh images can be displayed.
- FIG. 1 is a block diagram showing a schematic configuration of Embodiment 1 of a color conversion apparatus according to the present invention.
- FIG. 2 is a diagram showing a chromaticity diagram (A) and a table (B) showing areas in which the color reproduction range of an arbitrary display device is classified according to the magnitude relation of input RGB values.
- FIG. 3 is a block diagram showing a schematic configuration of the primary area detector in FIG. 1.
- FIG. 4 is a block diagram showing an example of an input / output relationship of the comparators 20 to 22 in FIG.
- FIG. 5 is a table showing the relationship between the outputs ⁇ ,
- FIG. 6 is a block diagram showing the operation of switch 25 in FIG. 3.
- FIG. 7 is a block diagram showing the operation of switch 26 in FIG.
- FIG. 8 is a diagram showing a chromaticity diagram ( ⁇ ) and a table ( ⁇ ) showing an area obtained by further dividing the area of FIG. 2 into two.
- FIG. 10 An area with a parameter that determines the boundary value so that A is wider than A.
- FIG. 11 is a chromaticity diagram showing a deviation between a green phase axis of a white LED backlight display device and a target NTSC green phase axis before performing color conversion by the color conversion device according to the present invention.
- FIG. 12 is a chromaticity diagram showing a state where the green hue axis and the NTSC hue axis of a white LED backlight display device are matched by color conversion by the color conversion device according to the present invention.
- FIG. 13 shows an example of the color reproduction range of a white LED backlight display device after the color conversion of the hue by the color conversion device according to the present invention and the NTSC color reproduction range that is the target of the hue after conversion. It is a chromaticity diagram.
- FIG. 14 shows an example of the color reproduction range of a white LED backlight display device after performing color conversion for saturation by the color conversion device according to the present invention, and the NTSC color reproduction range that is the target of the hue after conversion. It is a chromaticity diagram showing
- FIG. 15 is a flowchart showing a flow of operations of the color conversion method according to the present invention.
- FIG. 16 is a flowchart showing the flow of primary area detection operation of the color conversion method according to the present invention.
- FIG. 17 is a flowchart showing the flow of the secondary area detection operation of the color conversion method according to the present invention.
- FIG. 18 is a flowchart showing the flow of area-specific color conversion operation of the color conversion method according to the present invention.
- FIG. 19 is a color reproduction range example of a white LED backlight display device and a chromaticity diagram showing an NTSC color reproduction range.
- FIG. 20 is a block diagram showing a schematic configuration example of the matrix computing unit shown in FIG.
- FIG. 21 is a chromaticity diagram showing the color reproduction range of a white LED backlight display device when the hue axis is aligned with NTSC by a conventional method.
- FIG. 22 is a block diagram showing the configuration of a conventional color conversion device that can align the hue axis with NTSC.
- FIG. 23 is a chromaticity diagram showing a change in hue axis by the color conversion device shown in FIG.
- FIG. 1 is a block diagram showing a schematic configuration of Embodiment 1 of a color conversion apparatus according to the present invention.
- the color conversion apparatus according to the first embodiment includes a primary area detector 10, a boundary coefficient table 11, a comparator 12, a matrix coefficient table 13, a matrix calculator 14, multipliers 15 to 17, and an adder 18.
- the primary area detector 10 determines which of the six areas classified according to the magnitude relation of the input RGB value power RGB, and outputs the smallest value among the three RGB values.
- the color gamut that can be represented by the input RGB values is divided into six areas A, C, D, E, F, and H shown in 02 (A), depending on the size of RGB. Hereinafter, these six areas are called primary areas.
- the relationship between the maximum and minimum RGB values and the area shown in Fig. 2 (A) is shown in Fig. 2 (B).
- FIG. 10 A configuration example of the primary area detector 10 is shown in FIG. Three comparators are provided, and area identification is possible based on the results of each comparison. Note that all the comparators 20 to 22 compare the upper input 1 and the lower input m in the figure, as shown in Fig. 4, and output 1 if l ⁇ m and 0 if K m. It is supposed to be.
- the output ⁇ of the comparator 20 is 2 bits by the shift calculator 23, and the output ⁇ of the comparator 21 is shifted.
- the data is shifted by 1 bit by the calculator 24, added to the output ⁇ of the comparator 22, and output from the primary area detector 10 as a 3-bit parameter indicating the area.
- Figure 5 shows the relationship between the output 3-bit parameter and the area.
- the switches 25 and 26 switch the outputs as shown in Figs. 6 and 7 according to the inputs ⁇ and ⁇ , respectively.
- the output of switch 26 is the minimum RGB value.
- the configuration and operation of the primary area detector 10 have been described above in detail. This example is an example, and the embodiment is not limited to this example as long as it detects the primary area to which the input RGB value belongs and outputs the minimum RGB value.
- the boundary coefficient table 11 is a boundary for further dividing the six primary areas determined according to the parameter indicating the primary area to which the input RGB value belongs, output from the primary area detector 10. The coefficient that determines is output.
- the primary area is calculated by comparing the coefficient and RGB value output from the boundary coefficient table 11 with the RGB minimum value output from the primary area detector 10. They are divided into two areas. The primary area consisting of six areas is further divided into two, and the total area divided into 12 is called the secondary area.
- Fig. 8 (B) shows the relationship between the RGB maximum, minimum, judgment (comparison of minimum and boundary values), boundary values, and the area shown in Fig. 8 (A).
- the input RGB signal belongs to the deviation of the secondary areas X and X.
- Max is the maximum value of R, G, and B
- Min is the minimum value
- Mid is the remaining value that is neither the maximum nor the minimum when comparing the three RGB values. If equation (6) holds, the input RGB signal belongs to the secondary area X. Otherwise, it belongs to X.
- the color reproduction range is divided into a total of 12 areas.
- the boundary value is The coefficients vary according to the values of k, k, k, k, k, k, k, k, k, k, k, k, k, k, k.
- the boundary of the area can be arbitrarily set by setting the coefficient in the boundary coefficient table 11.
- the coefficients and RGB values output from the boundary coefficient table 11 are multiplied by multipliers 15 to 17 and then added by an adder 18.
- the comparator 12 compares the addition result with the RGB minimum value output from the primary area detector 10. For example, as shown in FIG. 4, the comparator 12 outputs 1 for l ⁇ m and 0 for Km as shown in FIG.
- the “judgment” shown in FIG. 8 (B) corresponds to the operation of the comparator 12. When the output is 1, the input RGB value is included in the X area in Fig. 8 (A), and when it is 0, it is included in the X area.
- the output is 1, the input RGB value is included in the X area in Fig. 8 (A), and when it is 0, it is included in the X area.
- X is A, C, D, E, F, or H.
- the comparison result is input to the matrix coefficient table 13.
- the matrix coefficient table 13 outputs R ′ G ′ according to the area including the input RGB value from the parameter indicating the primary area output by the primary area detector 10 and the comparison result by the comparator 12. Outputs matrix calculation coefficients to be converted to B 'values.
- FIG. 11 is an example of a color reproduction range of a display device using a white LED backlight.
- the solid triangle in the figure is the color reproduction range of the display device, and the dashed triangle is the NTSC color reproduction range.
- white LEDs have a peak only in the short wavelength region, so the color reproduction range of green and red is narrow.
- the hue axis of green is much larger in the red direction than NTSC.
- the color is yellowish green.
- h is a constant of 0 ⁇ h ⁇ 1 that determines the position of the green hue axis after conversion.
- the matrix calculator 14 converts the input RGB value by the three-dimensional matrix calculation into the output R ′ G ′ B ′ by the matrix calculation coefficient output from the matrix coefficient table 13. For example, it is realized by a combination of a multiplier and an adder as shown in Fig. 20.
- Figure 20 is an example of a configuration, and any configuration that implements a three-dimensional matrix operation can be used.
- the red and blue hue axes can be matched in the same manner as the force described for matching the green hue axis.
- FIG. 13 shows the simulation result when the hue axis is matched with the NTSC indicated by the broken line in the display device having the color reproduction range indicated by the solid line in FIG. As shown in Figure 13, the hue axis matches NTSC, and the original color reproduction range can be maintained.
- the saturation can be partially increased like 14.
- a is an arbitrary constant. The value of a determines the degree of saturation enhancement. When the saturation is emphasized as shown in Fig. 14, a ⁇ 0. If a> 0, the saturation can be reduced. Since the capacity of the display device is limited to the solid line in Fig. 14, the portion beyond this cannot be actually displayed and the gradation is lost.
- the saturation enhancement peak is in the approximate center between red and yellow.
- the peak position hits the boundary between areas D and D. Area D and D
- the boundary can be arbitrarily changed by the coefficient k, and the peak position can be specified by changing the boundary.
- the force at the boundary between areas D and D is the peak, and the other boundary is at the peak.
- the above description can be converted even with the combination of the other three colors, using the power of RGB data indicating red, green, and blue as input.
- FIG. 15 is a flowchart showing an operation flow of the color conversion method according to the present invention.
- the primary area detector 10 of the image display device detects which of the six areas (primary areas) classified according to the input RGB value power RGB magnitude relationship (step Sl).
- the primary area detector 10 further outputs the minimum value of RGB.
- the boundary coefficient table 11 outputs coefficients that determine the boundaries for further dividing the six primary areas determined in accordance with the parameter indicating the primary area to which the input RGB value belongs, output from the primary area detector 10. To do.
- the coefficients and RGB values output from the boundary coefficient table 11 are multiplied and added, and the comparator 12 compares the addition result with the RGB minimum value output from the primary area detector 10, and the comparison result is the matrix coefficient table 1 Entered in 3.
- the secondary area containing the input RGB value can be detected based on the comparison result (step S2).
- the matrix coefficient table 13 is a matrix operation for converting the parameter indicating the primary area and the comparison result by the comparator 12 into the output R ', G', and B 'values corresponding to the area including the input RGB value.
- Step S3 Outputs the coefficient of.
- FIG. 16 is a flowchart showing the flow of the primary area detection operation of the color conversion method according to the present invention.
- three comparators are provided in the primary area detector 10, and area identification is performed according to the comparison result of each comparator.
- step Sll it is determined whether the input RGB values G and B are G ⁇ B (step Sll). If G ⁇ B, the output value is set to 1 (step SI 2). Next, it is determined whether or not B ⁇ R (step S14), and further it is determined whether or not R ⁇ G (step S15).
- the area ⁇ (next area) can be determined according to the combination of the tables shown in FIG. 5 according to the outputs ⁇ , ⁇ , ⁇ of each comparator (step S26).
- FIG. 17 is a flowchart showing the flow of the secondary area detection operation of the color conversion method according to the present invention. Coefficients k and k are determined based on the primary area determination result X in Fig. 16 (
- Step S31 If or not the judgment formula k XMid + k XMax ⁇ Min holds
- step S32 Judgment is made (step S32).
- Max is the maximum value of R, G, and B
- Min is the minimum value
- Mid is the remaining value that is neither the maximum nor the minimum when comparing the three values of R GB.
- the input RGB signal belongs to the secondary area X (step S33). If the above judgment formula does not hold, the input RGB signal belongs to the secondary area X. (Step S34).
- FIG. 18 is a flowchart showing the flow of area-specific color conversion operation of the color conversion method according to the present invention.
- the matrix coefficient corresponding to the area including the input RGB value is read from the table (matrix coefficient table) (step S41). Then, color conversion is performed by a three-dimensional matrix operation (step S42).
- the color conversion device of the above embodiment is most preferably configured to be combined with a display device so as to perform optimal conversion for the display device, but in addition, a user using a portable or stationary personal computer. It can also be used when performing color conversion by operation.
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Application Number | Priority Date | Filing Date | Title |
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EP06711966A EP1857973A4 (en) | 2005-03-10 | 2006-01-19 | COLOR CHANGING DEVICE, PROGRAM, SCREEN AND PORTABLE TERMINAL |
JP2007506997A JPWO2006095496A1 (ja) | 2005-03-10 | 2006-01-19 | 色変換装置、プログラム、画像表示装置及び携帯型端末装置 |
US11/817,863 US20090052773A1 (en) | 2005-03-10 | 2006-01-19 | Color converting apparatus, program, image display device, and mobile terminal device |
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JP2005-066527 | 2005-03-10 | ||
JP2005066527 | 2005-03-10 |
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PCT/JP2006/300720 WO2006095496A1 (ja) | 2005-03-10 | 2006-01-19 | 色変換装置、プログラム、画像表示装置及び携帯型端末装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090052773A1 (ja) |
EP (1) | EP1857973A4 (ja) |
JP (1) | JPWO2006095496A1 (ja) |
KR (1) | KR20070108950A (ja) |
CN (1) | CN101138005A (ja) |
WO (1) | WO2006095496A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009031661A1 (ja) * | 2007-09-06 | 2009-03-12 | Mitsumi Electric Co., Ltd. | 色補正回路及びこれを用いた画像表示装置 |
JP2009081849A (ja) * | 2007-09-06 | 2009-04-16 | Mitsumi Electric Co Ltd | 色補正回路及びこれを用いた画像表示装置 |
EP2071554A1 (en) * | 2006-09-26 | 2009-06-17 | Sharp Kabushiki Kaisha | Liquid crystal display device |
WO2010044432A1 (ja) * | 2008-10-17 | 2010-04-22 | オリンパスメディカルシステムズ株式会社 | 内視鏡システムおよび内視鏡画像処理装置 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8027070B2 (en) * | 2009-02-03 | 2011-09-27 | Sharp Laboratories Of America, Inc. | Methods and systems for hue adjustment |
US9659354B2 (en) * | 2015-03-20 | 2017-05-23 | Intel Corporation | Color matching for imaging systems |
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JPH09247701A (ja) * | 1996-03-04 | 1997-09-19 | Hitachi Denshi Ltd | 色調補正装置 |
JP2001061160A (ja) * | 1999-08-24 | 2001-03-06 | Matsushita Electric Ind Co Ltd | 色補正装置 |
JP2002330298A (ja) * | 2001-05-01 | 2002-11-15 | Seiko Epson Corp | 画像処理装置、画像処理方法、プログラムおよび記録媒体 |
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US5933256A (en) * | 1996-05-14 | 1999-08-03 | Xexox Corporation | Method for color correction within a color space using hue shifting of a region therein |
JPH11355590A (ja) * | 1998-06-10 | 1999-12-24 | Fujitsu Ltd | 色補正方法、その方法をコンピュータに実行させるプログラムを記録したコンピュータ読み取り可能な記録媒体および色補正装置 |
JP3432468B2 (ja) * | 1999-01-27 | 2003-08-04 | 三菱電機株式会社 | 色変換装置および色変換方法 |
JPWO2004070699A1 (ja) * | 2003-02-07 | 2006-05-25 | 三洋電機株式会社 | 表示装置における色空間補正回路 |
JP2004274784A (ja) * | 2004-04-15 | 2004-09-30 | Mitsubishi Electric Corp | 色変換装置におけるマトリクス係数設定方法、色変換装置、およびこれを用いた画像表示装置 |
-
2006
- 2006-01-19 CN CNA2006800077971A patent/CN101138005A/zh active Pending
- 2006-01-19 KR KR1020077023061A patent/KR20070108950A/ko active IP Right Grant
- 2006-01-19 JP JP2007506997A patent/JPWO2006095496A1/ja active Pending
- 2006-01-19 US US11/817,863 patent/US20090052773A1/en not_active Abandoned
- 2006-01-19 WO PCT/JP2006/300720 patent/WO2006095496A1/ja not_active Application Discontinuation
- 2006-01-19 EP EP06711966A patent/EP1857973A4/en not_active Withdrawn
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JPH09247701A (ja) * | 1996-03-04 | 1997-09-19 | Hitachi Denshi Ltd | 色調補正装置 |
JP2001061160A (ja) * | 1999-08-24 | 2001-03-06 | Matsushita Electric Ind Co Ltd | 色補正装置 |
JP2002330298A (ja) * | 2001-05-01 | 2002-11-15 | Seiko Epson Corp | 画像処理装置、画像処理方法、プログラムおよび記録媒体 |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2071554A1 (en) * | 2006-09-26 | 2009-06-17 | Sharp Kabushiki Kaisha | Liquid crystal display device |
EP2071554A4 (en) * | 2006-09-26 | 2009-11-11 | Sharp Kk | LIQUID CRYSTAL DISPLAY DEVICE |
US8451391B2 (en) | 2006-09-26 | 2013-05-28 | Sharp Kabushiki Kaisha | Liquid crystal display device achieving predetermined color temperature while preventing a shift in color tone by correcting blue luminance |
CN101558440B (zh) * | 2006-09-26 | 2015-09-09 | 夏普株式会社 | 液晶显示装置 |
WO2009031661A1 (ja) * | 2007-09-06 | 2009-03-12 | Mitsumi Electric Co., Ltd. | 色補正回路及びこれを用いた画像表示装置 |
JP2009081849A (ja) * | 2007-09-06 | 2009-04-16 | Mitsumi Electric Co Ltd | 色補正回路及びこれを用いた画像表示装置 |
US8594421B2 (en) | 2007-09-06 | 2013-11-26 | Mitsumi Electric Co., Ltd. | Color correction circuit and image display apparatus using same |
WO2010044432A1 (ja) * | 2008-10-17 | 2010-04-22 | オリンパスメディカルシステムズ株式会社 | 内視鏡システムおよび内視鏡画像処理装置 |
US8419628B2 (en) | 2008-10-17 | 2013-04-16 | Olympus Medical Systems Corp. | Endoscope system and endoscopic image processing apparatus |
Also Published As
Publication number | Publication date |
---|---|
EP1857973A4 (en) | 2009-04-15 |
KR20070108950A (ko) | 2007-11-13 |
US20090052773A1 (en) | 2009-02-26 |
EP1857973A1 (en) | 2007-11-21 |
JPWO2006095496A1 (ja) | 2008-08-14 |
CN101138005A (zh) | 2008-03-05 |
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