Color image processing apparatus, color image processing method, program and recording medium
First Claim
1. A color image processing apparatus of performing a color image display using a red display, a green display, a blue display and a white display, comprising:
- white signal generation instrument which generates a white signal
W=min(Rin,Gin,Bin),
(Formula
1)based on an input red signal Rin for making said red display to be inputted, an input green signal Gin for making said green display to be inputted, and an input blue signal Bin for making said blue display to be inputted;
yellow signal generation instrument which generates a yellow signal
Ye=min(Rin−
W,Gin−
W),
(Formula
2)based on said input red signal Rin to be inputted, said input green signal Gin to be inputted, and said generated white signal W; and
first output white signal generation instrument which generates a first output white signal Wout(1) for making said white display to be outputted, based on said generated white signal W and said generated yellow signal Y,wherein said first output white signal generation instrument generates said first output white signal Wout(1)
Wout(1)=W+K1·
Ye
(Formula
3)for a predetermined positive constant K1.
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Accused Products
Abstract
A color image processing apparatus performs color image display using a red display, green display, blue display and white display. The apparatus includes a white signal generation circuit generating a white signal W based on an input red signal Rin for the red display, an input green signal Gin for the green display, and an input blue signal Bin for the blue display, a yellow signal generation circuit generating a yellow signal Ye, based on the input red signal Rin, the input green signal Gin, and the generated white signal W, and a first output white signal generation circuit generating a first output white signal Wout(1) for the white display, based on the generated white signal W and the generated yellow signal Ye.
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Citations
18 Claims
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1. A color image processing apparatus of performing a color image display using a red display, a green display, a blue display and a white display, comprising:
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white signal generation instrument which generates a white signal
W=min(Rin,Gin,Bin),
(Formula
1)based on an input red signal Rin for making said red display to be inputted, an input green signal Gin for making said green display to be inputted, and an input blue signal Bin for making said blue display to be inputted; yellow signal generation instrument which generates a yellow signal
Ye=min(Rin−
W,Gin−
W),
(Formula
2)based on said input red signal Rin to be inputted, said input green signal Gin to be inputted, and said generated white signal W; and first output white signal generation instrument which generates a first output white signal Wout(1) for making said white display to be outputted, based on said generated white signal W and said generated yellow signal Y, wherein said first output white signal generation instrument generates said first output white signal Wout(1)
Wout(1)=W+K1·
Ye
(Formula
3)for a predetermined positive constant K1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
for a predetermined positive constant L1.
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4. The color image processing apparatus according to claim 1, further comprising cyan signal generation instrument which generates a cyan signal
Cy=min(Gin−- W,Bin−
W),
(Formula
5)based on said input green signal Gin to be inputted, said input blue signal Bin to be inputted, and said generated white signal W, and second output white signal generation instrument which generates a second output white signal Wout(2) for making said white display to be outputted, instead of said first output white signal Wout(1), based on said generated first output white signal Wout(1) and said generated cyan signal Cy.
- W,Bin−
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5. The color image processing apparatus according to claim 4, wherein said second output white signal generation instrument generates said second output white signal Wout(2)
Wout(2)=Wout(1)+K2·- Cy
(Formula
6)for a predetermined positive constant K2.
- Cy
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6. The color image processing apparatus according to claim 4, further comprising output red signal generation instrument which generates an output red signal Rout for making said red display to be outputted, based on said input red signal Rin for making the red display to be inputted, said generated cyan signal Cy, and said generated first output white signal Wout(1).
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7. The color image processing apparatus according to claim 6, wherein said output red signal generation instrument generates said output red signal Rout
Rout=Rin−- L2·
Cy·
Wout(1)
(Formula
7)for a predetermined positive constant L2.
- L2·
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8. The color image processing apparatus according to claim 4, further comprising magenta signal generation instrument which generates a magenta signal
Ma=min(Bin−- W,Rin−
W),
(Formula
8)based on said input blue signal Bin to be inputted, said input red signal Rin to be inputted, and said generated white signal W, and third output white signal generation instrument which generates a third output white signal Wout(3) for making said white display to be outputted, instead of said second output white signal Wout(2), based on said generated second output white signal Wout(2) and said generated magenta signal Ma.
- W,Rin−
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9. The color image processing apparatus according to claim 8, wherein said third output white signal generation instrument generates said third output white signal Wout(3)
Wout(3)=Wout(2)+K3·- Ma
(Formula
9)for a predetermined positive constant K3.
- Ma
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10. The color image processing apparatus according to claim 8, further comprising output green signal generation instrument which generates an output green signal Gout for making said green display to be outputted, based on said input green signal Gin for making the green display to be inputted, said generated magenta signal Ma, and said generated second output white signal Wout(2).
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11. The color image processing apparatus according to claim 10, wherein said output green signal generation instrument generates said output green signal Gout
Gout=Gin−- L3·
Ma·
Wout(2)
(Formula
10)for a predetermined positive constant L3.
- L3·
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12. A color image processing method of performing a color image display using a red display, a green display, a blue display and a white display, comprising:
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a white signal generation step of generating a white signal
W=min(Rin,Gin,Bin),
(Formula
1)based on an input red signal Rin for making said red display to be inputted, an input green signal Gin for making said green display to be inputted, and an input blue signal Bin for making said blue display to be inputted; a yellow signal generation step of generating a yellow signal
Ye=min(Rin−
W,Gin−
W),
(Formula
2)based on said input red signal Rin to be inputted, said input green signal Gin to be inputted, and said generated white signal W; and a first output white signal generation step of generating a first output white signal Wout(1) for making said white display to be outputted, based on said generated white signal W and said generated yellow signal Y, wherein said first output white signal Wout(1) is generated as
Wout(1)=W+K1·
Ye
(Formula
3)for a predetermined positive constant K1. - View Dependent Claims (13, 14, 15, 16, 17, 18)
based on said input green signal Gin to be inputted, said input blue signal Bin to be inputted, and said generated white signal W, and a second output white signal generation step of generating a second output white signal Wout(2) for making said white display to be outputted, instead of said first output white signal Wout(1), based on said generated first output white signal Wout(1) and said generated cyan signal Cy.
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15. The color image processing method according to claim 14, further comprising an output red signal generation step of generating an output red signal Rout for making said red display to be outputted, based on said input red signal Rin for making the red display to be inputted, said generated cyan signal Cy, and said generated first output white signal Wout(1).
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16. The color image processing method according to claim 14, further comprising a magenta signal generation step of generating a magenta signal
Ma=min(Bin−- W,Rin−
W),
(Formula
8)based on said input blue signal Bin to be inputted, said input red signal Rin to be inputted, and said generated white signal W, and a third output white signal generation step of generating a third output white signal Wout(3) for making said white display to be outputted, instead of said second output white signal Wout(2), based on said generated second output white signal Wout(2) and said generated magenta signal Ma.
- W,Rin−
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17. The color image processing method according to claim 16, further comprising an output green signal generation step of generating an output green signal Gout for making said green display to be outputted, based on said input green signal Gin for making the green display to be inputted, said generated magenta signal Ma, and said generated second output white signal Wout(2).
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18. A recording medium which is computer processable and records a program for enabling a computer to perform the color image processing method according to claim 12, comprising:
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a white signal generation step of generating a white signal
W=min(Rin,Gin,Bin),
(Formula
1)based on an input red signal Rin for making said red display to be inputted, an input green signal Gin for making said green display to be inputted, and an input blue signal Bin for making said blue display to be inputted; a yellow signal generation step of generating a yellow signal
Ye=min(Rin−
W,Gin−
W),
(Formula
2)based on said input red signal Rin to be inputted, said input green signal Gin to be inputted, and said generated white signal W; and a first output white signal generation step of generating a first output white signal Wout(1) for making said white display to be outputted, based on said generated white signal W and said generated yellow signal Ye.
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Specification