WO2005043501A1 - カラー画像処理装置,カラー画像処理方法,プログラム,および記録媒体 - Google Patents
カラー画像処理装置,カラー画像処理方法,プログラム,および記録媒体 Download PDFInfo
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- WO2005043501A1 WO2005043501A1 PCT/JP2004/015933 JP2004015933W WO2005043501A1 WO 2005043501 A1 WO2005043501 A1 WO 2005043501A1 JP 2004015933 W JP2004015933 W JP 2004015933W WO 2005043501 A1 WO2005043501 A1 WO 2005043501A1
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- 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
-
- 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
-
- 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
- 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
- G09G3/34—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 by control of light from an independent source
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0439—Pixel structures
- G09G2300/0443—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations
-
- 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
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance 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
- G09G2340/00—Aspects of display data processing
- G09G2340/06—Colour space transformation
Definitions
- Color image processing apparatus color image processing method, program, and recording medium
- the present invention relates to, for example, a color image processing apparatus, a color image processing method, a program, and a recording medium that are used as devices for displaying direct-view and projection color images.
- a full-color image display is performed using a red-green-blue-white color wheel (for example, A. Kunzman, G G. Pettitt, "White Enhancement for Color-Sequential DLP", SID International Symposium Digest of Technical Papers, SID, United States (Society for Information Display), May 1998, Vol. 29, pp. 121-124).
- a red-green-blue-white color wheel for example, A. Kunzman, G G. Pettitt, "White Enhancement for Color-Sequential DLP", SID International Symposium Digest of Technical Papers, SID, United States (Society for Information Display), May 1998, Vol. 29, pp. 121-124.
- Such a one-chip DLP data projector can improve the brightness and contrast and can reduce the lamp power.
- a conventional color image processing apparatus includes a red pixel 1 for performing red display and a green pixel for performing green display, as shown in FIG.
- the white signal generation circuit 1000 receives an 8-bit input red signal R for displaying an incoming red display, and an 8-bit input green signal G for displaying an incoming green display. Come in m
- the white signal W is generated in order to add white for enhancing the brightness.
- the present inventor has confirmed that, particularly with respect to yellow, among yellow, cyan, and magenta, the tendency to feel dark is remarkable.
- the present invention takes into consideration the above-mentioned conventional problems, and considers, for example, a color appearance such that yellow appears dark in a color image display using red display, green display, blue display, and white display. It is an object of the present invention to provide a color image processing device, a color image processing method, a program, and a recording medium that can reduce the discomfort of the user.
- FIG. 12 is a diagram for explaining the principle of a conventional color image processing apparatus based on a pseudo columnar graph in which the signal value of each signal is set to the length of a vertical side of a rectangle.
- the cause of the above-mentioned discomfort in color appearance is the white signal
- the cause of the above-mentioned discomfort is considered to be related to the fact that the actual brightness deviates from the brightness sensation memorized by the brain. Is, R
- the first output white signal w generated by increasing the white signal w according to the magnitude of
- a first aspect of the present invention is a color image processing apparatus for performing color image display using red display, green display, blue display, and white display,
- a color image processing apparatus comprising:
- the first output white signal generation means includes a predetermined positive constant K
- an input blue signal B for performing the input blue display is provided.
- an output green signal generating means for generating an output green signal B for performing the above-described blue display to be output based on the generated yellow signal Ye and the generated white signal W.
- 1 is a color image processing apparatus according to the first aspect of the present invention.
- the output green signal generating means includes:
- a third aspect of the present invention is a color image processing apparatus for generating the output green signal B.
- the input green signal G and the input blue signal are identical to a fifth aspect of the present invention.
- the white display is performed instead of the first output white signal w (1) .
- a second output white signal generating means for generating a second output white signal w (2).
- 1 is a color image processing apparatus according to the first aspect of the present invention.
- the second output white signal generating means includes a predetermined positive constant K
- An image processing apparatus An image processing apparatus.
- a seventh aspect of the present invention relates to an input red signal R for performing the input red display
- a color image processing apparatus according to a fifth aspect of the present invention, further comprising output red signal generation means for generating out.
- the output red signal generation means includes:
- a ninth aspect of the present invention is that the input blue signal B that is input and the input red signal that is input are
- a third output white signal generating means for generating a third output white signal w (3) for
- 21 is a color image processing apparatus according to a fifth aspect of the present invention.
- the third output white signal generation means is provided for a predetermined positive constant K.
- An image processing apparatus An image processing apparatus.
- An eleventh aspect of the present invention provides an input green signal G for performing the input green display
- a ninth embodiment of the color image processing apparatus of the present invention further comprising a signal generation unit.
- the output green signal generation means includes:
- the eleventh aspect of the present invention is a color image processing apparatus for generating the output green signal G.
- a thirteenth invention is a color image processing method for performing color image display using red display, green display, blue display, and white display,
- An input green signal G for performing the green display and an input green signal G for performing the input blue display are provided.
- a fourteenth aspect of the present invention provides an input blue signal B for performing the blue display
- An output blue signal generation step of generating an output blue signal B for performing the blue display which is output based on the generated yellow signal Ye and the generated white signal W is further performed.
- a thirteenth aspect of the present invention provides the color image processing method according to the present invention.
- a fifteenth aspect of the present invention relates to the input green signal G and the input green signal.
- the white display is performed instead of the first output white signal w (1) .
- a thirteenth color image processing method according to the present invention comprising
- a fifteenth aspect of the color image processing method according to the present invention further comprising an output red signal generating step of generating out.
- a seventeenth aspect of the present invention relates to the input blue signal B,
- a fifteenth aspect of the present invention provides the color image processing method according to the present invention.
- An eighteenth aspect of the present invention provides an input green signal G for performing the input green display
- a seventeenth color image processing method further comprising a signal generation step.
- a nineteenth aspect of the present invention is the color image processing method according to the thirteenth aspect, wherein the input red signal R for performing the red display is inputted.
- the input green signal G for performing the green display and the input blue signal B for performing the blue display, based on the white signal m in
- a first output white signal W for performing the white display that is output based on the generated white signal w and the generated yellow signal Ye.
- a twentieth aspect of the present invention is a recording medium carrying the program of the nineteenth aspect of the present invention, which is a recording medium that can be processed by a computer.
- FIG. 1 is an explanatory view of the principle of a color image processing apparatus according to an embodiment of the present invention based on a pseudo columnar graph in which the signal value of each signal is the length of a vertical side of a rectangle. Part 1)
- FIG. 2 is a block diagram of a color image processing device according to an embodiment of the present invention.
- FIG. 3 is a diagram illustrating the principle of a color image processing apparatus according to an embodiment of the present invention based on a pseudo columnar graph in which signal values of respective signals are set to the length of a rectangular vertical side (part 2).
- FIG. 4 is a partial block diagram of a color image processing apparatus according to an embodiment of the present invention (part 1)
- FIG. 5 is a partial block diagram of a color image processing apparatus according to an embodiment of the present invention (part 2).
- FIG. 6 is a diagram illustrating a four-color wheel 15 and a DLP panel 16 according to an embodiment of the present invention.
- FIG. 7 is an explanatory diagram of a simulation result of color image processing according to a comparative example of the present invention.
- FIG. 8 is an explanatory diagram of a simulation result of color image processing according to the first embodiment of the present invention. Illustration of simulation results of color image processing [ Figure 10] Block diagram of conventional color image processing apparatus
- FIG. 11 Illustration of conventional liquid crystal pixel 5
- FIG. 12 is a diagram illustrating the principle of a conventional color image processing apparatus using a pseudo columnar graph in which the signal values of each signal are taken to be the length of a vertical side of a rectangle.
- FIG. 1 is a block diagram of a color image processing apparatus according to an embodiment of the present invention.
- the color image processing apparatus of the present embodiment includes a red pixel 1 for performing red display, a green pixel 2 for performing green display, a blue pixel 3 for performing blue display, and a white display.
- This is a color image processing apparatus for performing a full-color image display using a liquid crystal pixel 5 having a white pixel 4 for performing the operation (see FIG. 11).
- the white signal generation circuit 1000 includes an 8-bit input red signal R for displaying the input red display and an 8-bit input red signal R for displaying the input green display.
- Green signal G Green signal G
- the yellow signal generation circuit 2012 receives the input red signal R and the input green signal.
- the first output white signal generation circuit 3012 is based on the generated white signal W and the generated yellow signal Ye, and outputs an 8-bit first output white signal for performing white display.
- the first output white signal generation circuit 3012 outputs a predetermined positive constant K
- the output green signal generation circuit 4003 is provided with an input green signal B for performing the input blue display.
- I is a circuit that generates the output green signal B.
- the output green signal generation circuit 4003 is not essential.
- the white signal generation circuit 1000 corresponds to the white signal generation means of the present invention
- the yellow signal generation circuit 2012 corresponds to the yellow signal generation means of the present invention.
- the output blue signal generation circuit 4003 corresponds to the output blue signal generation means of the present invention.
- the first output white signal for a predetermined positive constant K, the first output white signal
- the white signal W is increased in calorific value by K′Ye in accordance with the size of the yellow signal Ye, and white display is performed. It is possible to suppress the adverse effect that the contrast with the emphasized white becomes too large and yellow looks dark (see Fig. 1).
- the output green signal generation circuit 4003 is not essential, but when such image processing is performed by the output green signal generation circuit 4003, each of the color image processing devices of the embodiment of the present invention can be used.
- Pseudo columnar in which the signal value of the signal is the length of the vertical side of the rectangle
- the input blue signal B is reduced by L'Ye'W according to the size of the yellow signal Ye and the white signal W to make it easier to understand if you look at Fig. 3, which is an explanatory diagram (2) of the principle based on the graph.
- blue display is performed in this way, blue, which is the complementary color of yellow, is suppressed, yellow can be maintained, and yellow is hardly seen.
- the white signal generation circuit 1000 has a minimum value detector 100.
- the minimum value detector 100 compares the input red signal R, the input green signal G, and the input blue signal B with each other.
- the yellow signal generation circuit 2012 includes a subtractor 201, a subtractor 302, and a minimum value detector 412.
- the subtractor 201 subtracts the white signal W from the input red signal R to generate a subtraction value RW, and
- the subtractor 302 subtracts the white signal W from the input green signal G to generate a subtraction value G-W,
- the minimum value detector 412 compares the subtraction value R-W with the subtraction value G-W to determine the minimum value min (R
- the first output white signal generation circuit 3012 has a multiplier 512 and an adder 612. [0072] Multiplier 512 multiplies yellow signal Ye by a predetermined positive constant to generate a multiplied value Ye.
- the adder 612 adds the multiplied value K'Ye to the white signal W to generate an added value W + K'Ye, and outputs the first output white signal.
- output green signal generation circuit 4003 has multiplier 703, multiplier 803, and subtractor 903.
- the multiplier 703 multiplies the yellow signal Ye by a predetermined positive constant L to generate a multiplied value L'Ye.
- the multiplier 803 is a circuit that multiplies the white signal W by the multiplied value L′ Ye to generate a multiplied value L ⁇ Ye′W and outputs the multiplied value L′ Ye′W.
- the subtractor 903 subtracts the multiplied value L ' ⁇ from the input green signal 8, and subtracts the subtracted value B—L-Ye
- minimum value detector 100 compares input red signal R, input green signal G, and input blue signal B to determine minimum value min (R, G, B).
- the subtractor 201 subtracts the white signal W from the input red signal R to generate a subtraction value RW, and outputs the subtraction value RW.
- Subtractor 302 subtracts white signal W from input green signal G to generate subtraction value G-W, and outputs the subtraction value G-W.
- the minimum value detector 412 compares the subtraction value R-W with the subtraction value G-W to determine the minimum value min (R
- multiplier 512 multiplies yellow signal Ye by a predetermined positive constant to generate multiplication value K′Ye, and outputs the multiplication value K′Ye I do.
- Adder 612 adds multiplied value K'Ye to white signal W to generate added value W + K'Ye, and outputs first output white signal
- multiplier 703 multiplies yellow signal Ye by a predetermined positive constant L to generate a multiplied value L'Ye, and outputs the multiplied value L'Ye.
- Multiplier 803 multiplies white signal W by multiplied value L'Ye to generate multiplied value L LYe'W, and outputs the multiplied value L ⁇ Ye'W.
- the subtractor 903 subtracts the multiplied value L from the incoming green signal 8 and subtracts the subtracted value B-L-Ye
- FIG. 4 is a partial block diagram (part 1) of the color image processing apparatus according to the embodiment of the present invention.
- 8-bit cyan signal based on incoming green signal G, incoming blue signal B, and generated white signal W (Equation 5)
- the second output white signal generation circuit 3023 calculates a predetermined positive constant K
- a circuit that generates the second output white signal w (2) may be used.
- the first output white signal W (1) is changed to K ⁇ according to the size of the cyan signal Cy.
- the color image processing apparatus of the present invention provides an input red signal R y for displaying a red input signal.
- an 8-bit output for performing red display is output.
- Output red signal generation means 4001 for generating a power red signal R may be further provided.
- the output red signal generation means 4001 determines that a predetermined positive constant L
- a circuit that generates the output red signal R may be used.
- Red which is the complementary color of, is suppressed and cyan can be retained, and cyan is hardly seen thin.
- the cyan signal generation circuit 2023 corresponds to the cyan signal generation means of the present invention.
- the output white signal generation circuit 3023 corresponds to the second output white signal generation means of the present invention, and the output red signal generation circuit 4001 corresponds to the output red signal generation means of the present invention.
- Cyan signal generation circuit 2023 has subtractor 202, subtractor 303, and minimum value detector 423.
- the subtractor 202 subtracts the white signal W from the input red signal green G to generate a subtraction value G—W.
- the subtracter 303 subtracts the white signal W from the input blue signal B to generate a subtraction value B-W, and
- the minimum value detector 423 compares the subtraction value G-W with the subtraction value B-W to determine the minimum value min (G
- Second output white signal generation circuit 3023 has multiplier 523 and adder 623.
- Multiplier 523 multiplies cyan signal Cy by a predetermined positive constant K to generate multiplied value K'Cy.
- the adder 623 adds the multiplied value K'Cy to the first output white signal W (1) .
- output red signal generation circuit 4001 has multiplier 701, multiplier 801 and subtractor 901.
- Multiplier 701 multiplies cyan signal Cy by a predetermined positive constant L to generate a multiplied value L'Cy.
- the multiplier 801 multiplies the first output white signal W (1) by the multiplied value L * Cy to obtain a multiplied value L-C
- This circuit generates 2 out 2 yW (1) and outputs the product L-CyW (1) .
- the subtractor 901 subtracts the multiplied value L-CyW) from the input red signal R to obtain a subtracted value R-L.
- FIG. 5 is a partial block diagram (part 2) of the color image processing apparatus according to the embodiment of the present invention, Based on the incoming blue signal B, the incoming red signal R, and the generated white signal W.
- the output white signal W (the third output white signal generation circuit 3031 that generates
- the third output white signal generation circuit 3031 provides a predetermined positive constant K
- a circuit that generates the third output white signal w (3) may be used.
- magenta looks dark. Although it is possible, magenta may appear whitish and pale.
- the color image processing apparatus of the present invention generates an input green signal G for displaying an input green, a generated magenta signal Ma, and a generated magenta signal Ma.
- Output green signal generation means 4002 for generating an output green signal G may be further provided.
- the output green signal generation means 4002 determines that a predetermined positive constant L
- a circuit that generates the output green signal G may be used.
- Input green signal G is reduced by L -Ma-W (
- Green which is a complementary color of magenta, is suppressed and magenta can be retained, and magenta is hardly seen as thin.
- the magenta signal generation circuit 2031 corresponds to the magenta signal generation means of the present invention
- the third output white signal generation circuit 3031 corresponds to the third output white signal generation means of the present invention
- the generation circuit 4002 corresponds to the output green signal generation means of the present invention.
- a subtractor 301 A subtractor 301, and a minimum value detector 431.
- the subtractor 203 subtracts the white signal W from the input blue signal green B to generate a subtraction value B—W,
- This circuit outputs the subtraction value B-W.
- the subtractor 301 subtracts the white signal W from the input red signal R to generate a subtraction value R-W, and
- the minimum value detector 431 compares the subtraction value B-W with the subtraction value R-W to determine the minimum value min (B
- third output white signal generation circuit 3031 has multiplier 531, and adder 631.
- the multiplier 531 multiplies the magenta signal Ma by a predetermined positive constant K to obtain a product value K'Ma
- the adder 631 adds the multiplied value K'Ma to the second output white signal W (2) to add the added value W (
- output green signal generation circuit 4002 has multiplier 702, multiplier 802, and subtractor 902.
- Multiplier 702 multiplies magenta signal Ma by a predetermined positive constant L to obtain a multiplied value L'Ma
- the multiplier 802 multiplies the multiplied value L'Ma by the second output white signal W (
- This circuit generates Ma-W ( 2) and outputs the product L -Ma-W (.
- the subtractor 902 subtracts the multiplied value L -Ma-W (from the input green signal G and subtracts the subtracted value G -L
- the color image processing device of the present invention is a color image processing device for displaying a color image using the liquid crystal pixels 5 in the above-described embodiment.
- FIG. 6 is an explanatory diagram of the four-color color wheel 15 and the DLP panel 16 in the embodiment of the present invention.
- a color image processing device for displaying a color image using the four-color wheel 15 and the DLP panel 16 may be used.
- the four-color wheel 15 performs a red filter 11 for performing red display, a green filter 12 for performing green display, a blue filter 13 for performing blue display, and performs white display. And a transparent filter 14.
- the four-color wheel 15 is a color wheel having an RGBW four-color segment used in a color sequential DLP projector also called a field sequential system.
- the center angle of the segment of the transparent filter 14 is about 70 degrees.
- the white and transparent filters 14 when the red filter 11, the green filter 12, and the blue filter 13 are used in all gradations of 255 are used.
- the brightness ratio with white is about 1: 1 and the light transmittance, called CW (Color Wheel) efficiency, of the entire four-color color wheel 15 is about 50%.
- the four-color wheel 15 rotates in the direction of the arrow X to emit red light for red display, green light for green display, blue light for blue display, and white display.
- White light to be generated is generated for each corresponding time zone.
- the generated light is guided by an optical system in which a relay lens (not shown) and a mirror (not shown) are combined, and reaches the DLP panel 16.
- the DLP panel 16 generates a gray scale according to the light that has arrived, and reflects the light to a projection lens (not shown).
- the projection lens (not shown) projects the reflected light on a screen (not shown) as mixed light.
- the color image processing apparatus of the present invention performs an operation using a multiplier such as the multiplier 512.
- the present invention is not limited to this, and the color image processing apparatus of the present invention may perform an operation using an adder or a shifter that performs addition or shift (digit number shift), and Z or ROM. .
- the circuit configuration can be simplified by using an adder, a shifter, and Z or ROM.
- the program of the present invention is a program for causing a computer to execute all or some of the steps of the color image processing method of the present invention described above. , A program that operates in cooperation with a computer.
- the recording medium of the present invention is a recording medium carrying a program for causing a computer to execute all or some of the operations of all or some of the above-described color image processing methods of the present invention.
- the "partial steps" of the present invention mean one or several steps of the plurality of steps.
- the "operation of the step” in the present invention means the operation of all or part of the step.
- One use form of the program of the present invention may be a form in which the program is recorded on a computer-readable recording medium and operates in cooperation with the computer.
- One use form of the program of the present invention may be a form in which the program is transmitted through a transmission medium, read by a computer, and operates in cooperation with the computer.
- the recording medium includes a ROM and the like
- the transmission medium includes a transmission medium such as the Internet, light, radio waves, and sound waves.
- the computer of the present invention described above is not limited to pure hardware such as a CPU, but may include firmware, an OS, and peripheral devices.
- the configuration of the present invention may be realized by software, or may be realized by hardware.
- the linear RGB signal obtained by performing the inverse gamma conversion on the original RGB signal on which the gamma conversion has been performed is described above. It is used as an input RGB signal to be input to the color image processing device in the embodiment described above. More specifically,
- the input linear signal R for displaying red is taken as the linear signal; Performs inverse gamma conversion on the original green signal G for displaying green with gamma conversion o
- the resulting linear signal is the input blue signal B for displaying blue.
- the white boost input signal that is the minimum value of the linear RGB signal is the white signal W in the above-described embodiment.
- the CRT monitor in this example (the comparative example and the examples 1-2) described below is a CRT monitor that displays using three primary colors of red, green and blue without adding white. .
- the white signal W which is the white boost input signal
- the white signal W is subjected to 30% subtraction and clipping, and then the gain adjustment for normalizing the maximum amplitude to 1 is performed.
- a white boost output signal w is added to the linear RGB signal subjected to the inverse gamma conversion, the gain is adjusted by a factor of 1Z2, the gamma conversion is performed, and the simulation display is displayed on the CRT monitor. Generate the display RGB signal to perform. More specifically, after adjusting the gain by adding the white boost output signal w to the input red signal R,
- FIG. 7 is an explanatory diagram of the simulation results.
- the color image processing in the above-described embodiment is performed except for the color image processing for suppressing blue, which is a complementary color of yellow.
- the first output white signal W (1) is clipped by performing a 30% subtraction on the first output white signal W (1) instead of the white signal W itself as the white boost input signal, and
- the first white boost output signal w (1) is generated.
- the first white boost output signal w (1) is added to the linear RGB signal subjected to the inverse gamma conversion, the gain is adjusted by a factor of 1Z2, and then the gamma conversion is performed. out
- the blue display signal B d for blue display on the CRT monitor After performing the gamma conversion, the blue display signal B d for blue display on the CRT monitor
- the result of performing the color image processing in the present example is (R, o) as in the comparative example.
- G, B (255, 255, 0), (255, 255, 51), (255, 255, 102), (255, 255, 1 o o
- FIG. 8 is an explanatory diagram of the simulation result of the color image processing in Embodiment 1 of the present invention for the case of ⁇ O.4.
- all the color image processing in the above-described embodiment is performed, including color image processing for suppressing blue, which is a complementary color of yellow.
- the gain is adjusted to normalize the maximum amplitude to 1, and the first white boost output signal w (1) is generated.
- the green display signal G for green display on the CRT monitor After performing the gamma conversion, the green display signal G for green display on the CRT monitor
- FIG. 9 is a diagram illustrating a simulation result of color image processing according to the second embodiment of the present invention.
- the red display signal R (1) is larger than the red display signal R to) in comparison with the simulation result in the comparative example (see Fig. 7).
- the green display signal G ⁇ is larger than the green display signal G (), and the blue display dd
- the signal B (1) is larger than the blue display signal B (G) . Therefore, yellow is darker than white.
- the red display signal R ⁇ is equal to the red display signal R ()
- the green display signal G (1 ) is equal to the ddd green display signal G W
- the blue display signal ⁇ (1) is equal to the blue display signal B W Are equal.
- the predetermined positive constant K be somewhat large.
- the blue display signal B (255, 255, 0) for the original RGB signal other than the original RGB signal, the blue display signal B ( the blue display signal B dd) is compared with the simulation result (see FIG. 8) in the first embodiment.
- the color image processing apparatus reduces the discomfort of the color appearance such that yellow appears dark in a color image display using red display, green display, blue display, and white display, for example. Can be useful.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Processing Of Color Television Signals (AREA)
- Facsimile Image Signal Circuits (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Image Processing (AREA)
- Liquid Crystal Display Device Control (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Color Image Communication Systems (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
Description
Claims
Priority Applications (4)
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JP2005515136A JP4644602B2 (ja) | 2003-10-30 | 2004-10-27 | カラー画像処理装置,カラー画像処理方法,プログラム,および記録媒体 |
EP04793045A EP1679677A4 (en) | 2003-10-30 | 2004-10-27 | COLOR PROCESSING DEVICE, COLOR PROCESSING PROCESS, PROGRAM AND RECORDING MEDIUM |
US10/577,031 US7643094B2 (en) | 2003-10-30 | 2004-10-27 | Color image processing apparatus, color image processing method, program and recording medium |
KR1020067006109A KR101076071B1 (ko) | 2003-10-30 | 2006-03-29 | 컬러화상 처리장치, 컬러화상 처리방법 및 기록매체 |
Applications Claiming Priority (2)
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JP2003371209 | 2003-10-30 | ||
JP2003-371209 | 2003-10-30 |
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WO2005043501A1 true WO2005043501A1 (ja) | 2005-05-12 |
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PCT/JP2004/015933 WO2005043501A1 (ja) | 2003-10-30 | 2004-10-27 | カラー画像処理装置,カラー画像処理方法,プログラム,および記録媒体 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7643094B2 (ja) |
EP (1) | EP1679677A4 (ja) |
JP (1) | JP4644602B2 (ja) |
KR (1) | KR101076071B1 (ja) |
CN (1) | CN100440278C (ja) |
WO (1) | WO2005043501A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008038568A1 (fr) * | 2006-09-26 | 2008-04-03 | Sharp Kabushiki Kaisha | Dispositif d'affichage à cristaux liquides |
JPWO2011010637A1 (ja) * | 2009-07-22 | 2012-12-27 | シャープ株式会社 | 液晶表示装置の製造方法 |
WO2016185958A1 (ja) * | 2015-05-18 | 2016-11-24 | シャープ株式会社 | 表示装置および色空間の拡張方法 |
Families Citing this family (8)
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JP5426559B2 (ja) * | 2008-09-22 | 2014-02-26 | シャープ株式会社 | 多原色液晶表示装置 |
KR101479993B1 (ko) | 2008-10-14 | 2015-01-08 | 삼성디스플레이 주식회사 | 4색 표시 장치 및 그 신호 변환 방법 |
WO2011118232A1 (ja) * | 2010-03-26 | 2011-09-29 | パナソニック株式会社 | 表示装置 |
CN102024443B (zh) * | 2010-12-06 | 2013-03-20 | 广东威创视讯科技股份有限公司 | 一种图像色彩处理方法及其*** |
KR101601206B1 (ko) | 2014-06-30 | 2016-03-08 | 주식회사 하이박 | 3실형 고진공 브레이징 장치 |
US10192477B2 (en) * | 2015-01-08 | 2019-01-29 | Lighthouse Technologies Limited | Pixel combination of full color LED and white LED for use in LED video displays and signages |
CN107358592B (zh) * | 2017-09-08 | 2020-06-30 | 哈尔滨理工大学 | 一种迭代式全局自适应图像增强方法 |
KR20220039429A (ko) | 2020-09-22 | 2022-03-29 | 삼성전자주식회사 | 컬러 분해 방법 및 이를 이용한 심층 학습 기반의 디모자이킹 방법 |
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2004
- 2004-10-27 JP JP2005515136A patent/JP4644602B2/ja not_active Expired - Fee Related
- 2004-10-27 US US10/577,031 patent/US7643094B2/en not_active Expired - Fee Related
- 2004-10-27 WO PCT/JP2004/015933 patent/WO2005043501A1/ja active Application Filing
- 2004-10-27 EP EP04793045A patent/EP1679677A4/en not_active Withdrawn
- 2004-10-27 CN CNB2004800320610A patent/CN100440278C/zh not_active Expired - Fee Related
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2006
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WO2008038568A1 (fr) * | 2006-09-26 | 2008-04-03 | Sharp Kabushiki Kaisha | Dispositif d'affichage à cristaux liquides |
JPWO2008038568A1 (ja) * | 2006-09-26 | 2010-01-28 | シャープ株式会社 | 液晶表示装置 |
JP4976404B2 (ja) * | 2006-09-26 | 2012-07-18 | シャープ株式会社 | 液晶表示装置 |
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 |
JPWO2011010637A1 (ja) * | 2009-07-22 | 2012-12-27 | シャープ株式会社 | 液晶表示装置の製造方法 |
WO2016185958A1 (ja) * | 2015-05-18 | 2016-11-24 | シャープ株式会社 | 表示装置および色空間の拡張方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20060088892A (ko) | 2006-08-07 |
EP1679677A4 (en) | 2009-04-29 |
CN100440278C (zh) | 2008-12-03 |
US20090009664A1 (en) | 2009-01-08 |
JPWO2005043501A1 (ja) | 2007-11-29 |
JP4644602B2 (ja) | 2011-03-02 |
KR101076071B1 (ko) | 2011-10-21 |
EP1679677A1 (en) | 2006-07-12 |
CN1875392A (zh) | 2006-12-06 |
US7643094B2 (en) | 2010-01-05 |
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