Editing (including hue editing) of digital color images
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G06F-015/00
G06K-001/00
G03F-003/08
G03F-003/00
G06T-017/00
G09G-005/00
H04N-001/60
출원번호
US-0376837
(2006-03-16)
등록번호
US-7495801
(2009-02-24)
발명자
/ 주소
Bezryadin,Sergey N.
출원인 / 주소
KWE International, Inc.
대리인 / 주소
Shenker,Michael
인용정보
피인용 횟수 :
0인용 특허 :
11
초록▼
Color is edited using a color representation including digital values B (brightness), C (chroma) and H (hue) such that B=√{square root over (D2+E2+F2)}, cos C=D/B and tan H=E/F, where DEF is a linear color coordinate system. The hue can be changed without changing the brightness and without ch
Color is edited using a color representation including digital values B (brightness), C (chroma) and H (hue) such that B=√{square root over (D2+E2+F2)}, cos C=D/B and tan H=E/F, where DEF is a linear color coordinate system. The hue can be changed without changing the brightness and without changing the saturation if the H coordinate is changed without changing B and C. Also, the brightness can be changed without a color shift by changing the B coordinate and leaving unchanged the C and H coordinates. Other features are also provided.
대표청구항▼
The invention claimed is: 1. A circuitry-implemented method comprising image editing, the method comprising: (1) obtaining digital data representing coordinates of a color S in a first coordinate system, wherein the color S has tristimulus values T1, T2, and T3 in a second coordinate system, wherei
The invention claimed is: 1. A circuitry-implemented method comprising image editing, the method comprising: (1) obtaining digital data representing coordinates of a color S in a first coordinate system, wherein the color S has tristimulus values T1, T2, and T3 in a second coordinate system, wherein the coordinates in the first coordinate system comprise coordinates S1, S2, S3, or are a linear transformation of the coordinates S1, S2, S3, wherein: (A) the coordinate S1 is defined by a value description="In-line Formulae" end="lead"B=√{square root over (g11T12+g22T2 2+g33T32+g 12T1T2+g13T 1T3+g23T2T 3)}description="In-line Formulae" end="tail" wherein g11, g22, g33, g12, g13, g23 are predefined constants, and g11, g22, g33 are not equal to zero, or the coordinate S1 is defined by the value B and by a sign of a predefined function of one or more of T1, T2, T3; (B) a value cos S2 is defined by a value β(T1,T2,T3)/B, wherein description="In-line Formulae" end="lead"β(T1,T2,T3 )=β1��T1+β2��T2 +β3��T3,description="In-line Formulae" end="tail" wherein β1, β2, β3 are predefined numbers at least one of which is not equal to zero, or the value cos S2 is defined by the value β(T1,T2,T3)/B and the sign of said predefined function of one or more of T1, T2, T3; (C) a value tan S3 is defined by a value γ(T1,T2,T3)/δ(T1,T2 ,T3), wherein description="In-line Formulae" end="lead"γ(T1,T2,T3 )=γ1��T1+γ2��T 2+γ3��T3,description="In-line Formulae" end="tail" description="In-line Formulae" end="lead"δ(T1,T2,T3 )=δ1��T1+δ2��T 2+δ3��T3,description="In-line Formulae" end="tail" wherein γ1, γ2, γ3 are predefined numbers at least one of which is not equal to zero, and δ1, δ2, δ3 are predefined numbers at least one of which is not equal to zero, or the value tan S3 is defined by the value γ(T1,T2,T3)/δ(T1,T2 ,T3) and the sign of said predefined function of one or more of T1, T2, T3; (2) obtaining data indicating a desired change in the value S3; (3) obtaining color coordinates in the first color coordinate system of a modified color whose coordinate S3 incorporates said desired change but the coordinates S1 and S2 are unchanged. 2. The method of claim 1 wherein: description="In-line Formulae" end="lead"B=√{square root over (α12(T1,T2,T 3)+α22(T1,T 2,T3)+α3 2(T1,T2,T3))}{square root over (α12(T1,T2,T 3)+α22(T1,T 2,T3)+α3 2(T1,T2,T3))}{square root over (α12(T1,T2,T 3)+α22(T1,T 2,T3)+α3 2(T1,T2,T3))} description="In-line Formulae" end="tail" wherein description="In-line Formulae" end="lead"α1(T1,T2,T 3)=α11��T1+α12 ��T2+α13��T3 description="In-line Formulae" end="tail" description="In-line Formulae" end="lead"α2(T1,T2,T 3)=α21��T1+α22 ��T2+α23��T3 description="In-line Formulae" end="tail" description="In-line Formulae" end="lead"α3(T1,T2,T 3)=α31��T1+α32 ��T2+α33��T3 description="In-line Formulae" end="tail" wherein α11, α12, α13, α21, α22, α23, α31, α32, α33 are predefined numbers such that the following matrix Λ is non-degenerate: 3. The method of claim 2 wherein β(T1,T2,T3)=α1(T1, T2,T3); description="In-line Formulae" end="lead"γ(T1,T2,T3 ) is one of α2(T1,T2,T3), α3(T1,T2, T3); anddescription="In-line Formulae" end="tail" description="In-line Formulae" end="lead"δ(T1,T2,T3) is the other one of α2(T1,T2,T3), α3(T1, T2,T3).description="In-line Formulae" end="tail" 4. The method of claim 1 wherein any color whose tristimulus values T1,T2,T3 are such that β(T1,T2,T3) is not zero and γ(T1,T2,T3)=δ(T1,T2 ,T3)=0, is a white or a shade of gray. 5. The method of claim 2 wherein a monochromatic red color of a predefined wavelength has tristimulus values T1, T2, T3 such that α2(T1,T2,T3) is not zero and α3(T1,T2,T3)=0. 6. The method of claim 2 wherein α1(T1,T2,T3), α2(T1,T2,T3), α3(T1,T2,T3) are tristimulus values corresponding to 70%-orthonormal color matching functions. 7. The method of claim 6 wherein α1(T1,T2,T3), α2(T1,T2,T3), α3(T1,T2,T3) are tristimulus values corresponding to 90%-orthonormal color matching functions. 8. The method of claim 2 wherein: the value T1 is one of values D, E, F, the value T2 is another one of D, E, F, and the value T3 is the third one of D, E, F, where where the matrix A has elements which, up to rounding, are as follows: where X, Y, Z are the coordinates of the color S in the CIE 1931 XYZ color coordinate system for a 2�� field; wherein up to a constant multiple, Λ is a 70%-orthonormal matrix. 9. Circuitry adapted to perform the method of claim 1. 10. A data carrier consisting of a manufacture comprising one or more computer-readable computer instructions for causing a computer system to perform the method of claim 1. 11. Circuitry for performing the method of claim 2. 12. One or more computer-readable mediums comprising computer instructions for causing a computer system to perform the method of claim 2. 13. Circuitry for performing the method of claim 3. 14. One or more computer-readable mediums comprising computer instructions or more computer instructions for causing a computer system to perform the method of claim 3. 15. Circuitry for performing the method of claim 4. 16. One or more computer-readable mediums comprising computer instructions for causing a computer system to perform the method of claim 4. 17. Circuitry for performing the method of claim 6. 18. One or more computer-readable mediums comprising computer instructions for causing a computer system to perform the method of claim 6. 19. Circuitry for performing the method of claim 8. 20. One or more computer-readable mediums comprising computer instructions for causing a computer system to perform the method of claim 8. 21. A data transmission method comprising transmitting a computer program over a network link, wherein the computer program is operable to cause a computer system tp perform the method of claim 1.
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이 특허에 인용된 특허 (11)
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