色彩空间转换公式汇编.DOC

1、色彩空间转换公式汇编 来源：http:/ RGBref_X = 95.047 /Observer = 2, Illuminant = D65ref_Y = 100.000ref_Z = 108.883var_X = X / 100 /X = From 0 to ref_Xvar_Y = Y / 100 /Y = From 0 to ref_Yvar_Z = Z / 100 /Z = From 0 to ref_Yvar_R = var_X * 3.2406 + var_Y * -1.5372 + var_Z * -0.4986var_G = var_X * -0.9689 + var_Y *

2、1.8758 + var_Z * 0.0415var_B = var_X * 0.0557 + var_Y * -0.2040 + var_Z * 1.0570if ( var_R 0.0031308 ) var_R = 1.055 * ( var_R ( 1 / 2.4 ) ) - 0.055else var_R = 12.92 * var_Rif ( var_G 0.0031308 ) var_G = 1.055 * ( var_G ( 1 / 2.4 ) ) - 0.055else var_G = 12.92 * var_Gif ( var_B 0.0031308 ) var_B = 1

3、.055 * ( var_B ( 1 / 2.4 ) ) - 0.055else var_B = 12.92 * var_BR = var_R * 255G = var_G * 255B = var_B * 255 /*RGB XYZvar_R = ( R / 255 ) /R = From 0 to 255var_G = ( G / 255 ) /G = From 0 to 255var_B = ( B / 255 ) /B = From 0 to 255if ( var_R 0.04045 ) var_R = ( ( var_R + 0.055 ) / 1.055 ) 2.4else va

4、r_R = var_R / 12.92if ( var_G 0.04045 ) var_G = ( ( var_G + 0.055 ) / 1.055 ) 2.4else var_G = var_G / 12.92if ( var_B 0.04045 ) var_B = ( ( var_B + 0.055 ) / 1.055 ) 2.4else var_B = var_B / 12.92var_R = var_R * 100var_G = var_G * 100var_B = var_B * 100/Observer. = 2, Illuminant = D65X = var_R * 0.41

5、24 + var_G * 0.3576 + var_B * 0.1805Y = var_R * 0.2126 + var_G * 0.7152 + var_B * 0.0722Z = var_R * 0.0193 + var_G * 0.1192 + var_B * 0.9505/*XYZ Yxy /X = From 0 to 95.047 Observer. = 2, Illuminant = D65/Y = From 0 to 100.000/Z = From 0 to 108.883Y = Yx = X / ( X + Y + Z )y = Y / ( X + Y + Z )/*Yxy

6、XYZ/Y = From 0 to 100/x = From 0 to 1/y = From 0 to 1X = x * ( Y / y )Y = YZ = ( 1 - x - y ) * ( Y / y )/*XYZ Hunter-Lab(H)L = 10 * sqrt( Y )(H)a = 17.5 * ( ( ( 1.02 * X ) - Y ) / sqrt( Y ) )(H)b = 7 * ( ( Y - ( 0.847 * Z ) ) / sqrt( Y ) )/*Hunter-Lab XYZvar_Y = (H)L / 10var_X = (H)a / 17.5 * (H)L /

7、 10var_Z = (H)b / 7 * (H)L / 10Y = var_Y 2X = ( var_X + out_Y ) / 1.02Z = -( var_Z - out_Y ) / 0.847/*XYZ CIE-L*abvar_X = X / 95.047 /Observer = 2, Illuminant = D65var_Y = Y / 100.000var_Z = Z / 108.883if ( var_X 0.008856 ) var_X = var_X ( 1/3 )else var_X = ( 7.787 * var_X ) + ( 16 / 116 )if ( var_Y

8、 0.008856 ) var_Y = var_Y ( 1/3 )else var_Y = ( 7.787 * var_Y ) + ( 16 / 116 )if ( var_Z 0.008856 ) var_Z = var_Z ( 1/3 )else var_Z = ( 7.787 * var_Z ) + ( 16 / 116 )CIE-L* = ( 116 * var_Y ) - 16CIE-a* = 500 * ( var_X - var_Y )CIE-b* = 200 * ( var_Y - var_Z )/*CIE-L*ab XYZvar_Y = ( CIE-L* + 16 ) / 1

9、16var_X = CIE-a* / 500 + var_Yvar_Z = var_Y - CIE-b* / 200if ( var_Y3 0.008856 ) var_Y = var_Y3else var_Y = ( var_Y - 16 / 116 ) / 7.787if ( var_X3 0.008856 ) var_X = var_X3else var_X = ( var_X - 16 / 116 ) / 7.787if ( var_Z3 0.008856 ) var_Z = var_Z3else var_Z = ( var_Z - 16 / 116 ) / 7.787X = ref_

10、X * var_X /ref_X = 95.047 Observer= 2, Illuminant= D65Y = ref_Y * var_Y /ref_Y = 100.000Z = ref_Z * var_Z /ref_Z = 108.883/* CIE-L*ab CIE-L*CHvar_H = arc_tangent( CIE-b*, CIE-a* ) /Quadrant by signsif ( var_H 0 ) var_H = ( var_H / PI ) * 180else var_H = 360 - ( abs( var_H ) / PI ) * 180CIE-L* = CIE-

11、L*CIE-C* = sqrt( CIE-a* 2 + CIE-b* 2 )CIE-H= var_H/*XYZ CIE-L*uvvar_U = ( 4 * X ) / ( X + ( 15 * Y ) + ( 3 * Z ) )var_V = ( 9 * Y ) / ( X + ( 15 * Y ) + ( 3 * Z ) )var_Y = Y / 100if ( var_Y 0.008856 ) var_Y = var_Y ( 1/3 )else var_Y = ( 7.787 * var_Y ) + ( 16 / 116 )ref_X = 95.047 /Observer= 2, Illu

12、minant= D65ref_Y = 100.000ref_Z = 108.883ref_U = ( 4 * ref_X ) / ( ref_X + ( 15 * ref_Y ) + ( 3 * ref_Z ) )ref_V = ( 9 * ref_Y ) / ( ref_X + ( 15 * ref_Y ) + ( 3 * ref_Z ) )CIE-L* = ( 116 * var_Y ) - 16CIE-u* = 13 * CIE-L* * ( var_U - ref_U )CIE-v* = 13 * CIE-L* * ( var_V - ref_V )/*CIE-L*uv XYZvar_

13、Y = ( CIE-L* + 16 ) / 116if ( var_Y3 0.008856 ) var_Y = var_Y3else var_Y = ( var_Y - 16 / 116 ) / 7.787ref_X = 95.047 /Observer= 2, Illuminant= D65ref_Y = 100.000ref_Z = 108.883ref_U = ( 4 * ref_X ) / ( ref_X + ( 15 * ref_Y ) + ( 3 * ref_Z ) )ref_V = ( 9 * ref_Y ) / ( ref_X + ( 15 * ref_Y ) + ( 3 *

14、ref_Z ) )var_U = CIE-u* / ( 13 * CIE-L* ) + ref_Uvar_V = CIE-v* / ( 13 * CIE-L* ) + ref_VY = var_Y * 100X = - ( 9 * Y * var_U ) / ( ( var_U - 4 ) * var_V - var_U * var_V )Z = ( 9 * Y - ( 15 * var_V * Y ) - ( var_V * X ) ) / ( 3 * var_V )/*RGB HSLvar_R = ( R / 255 ) /RGB values = From 0 to 255var_G =

15、 ( G / 255 )var_B = ( B / 255 )var_Min = min( var_R, var_G, var_B ) /Min. value of RGBvar_Max = max( var_R, var_G, var_B ) /Max. value of RGBdel_Max = var_Max - var_Min /Delta RGB valueL = ( var_Max + var_Min ) / 2if ( del_Max = 0 ) /This is a gray, no chroma.H = 0 /HSL results = From 0 to 1S = 0els

16、e /Chromatic data.if ( L 1 ) ; H -= 1/*HSL RGBif ( S = 0 ) /HSL values = From 0 to 1R = L * 255 /RGB results = From 0 to 255G = L * 255B = L * 255elseif ( L 1 ) vH -= 1if ( ( 6 * vH ) HSVvar_R = ( R / 255 ) /RGB values = From 0 to 255var_G = ( G / 255 )var_B = ( B / 255 )var_Min = min( var_R, var_G,

17、 var_B ) /Min. value of RGBvar_Max = max( var_R, var_G, var_B ) /Max. value of RGBdel_Max = var_Max - var_Min /Delta RGB value V = var_Maxif ( del_Max = 0 ) /This is a gray, no chroma.H = 0 /HSV results = From 0 to 1S = 0else /Chromatic data.S = del_Max / var_Maxdel_R = ( ( ( var_Max - var_R ) / 6 )

18、 + ( del_Max / 2 ) ) / del_Maxdel_G = ( ( ( var_Max - var_G ) / 6 ) + ( del_Max / 2 ) ) / del_Maxdel_B = ( ( ( var_Max - var_B ) / 6 ) + ( del_Max / 2 ) ) / del_Maxif ( var_R = var_Max ) H = del_B - del_Gelse if ( var_G = var_Max ) H = ( 1 / 3 ) + del_R - del_Belse if ( var_B = var_Max ) H = ( 2 / 3

19、 ) + del_G - del_Rif ( H 1 ) ; H -= 1/*HSV RGBif ( S = 0 ) /HSV values = From 0 to 1R = V * 255 /RGB results = From 0 to 255G = V * 255B = V * 255elsevar_h = H * 6var_i = int( var_h ) /Or . var_i = floor( var_h )var_1 = V * ( 1 - S )var_2 = V * ( 1 - S * ( var_h - var_i ) )var_3 = V * ( 1 - S * ( 1

20、- ( var_h - var_i ) ) )if ( var_i = 0 ) var_r = V ; var_g = var_3 ; var_b = var_1 else if ( var_i = 1 ) var_r = var_2 ; var_g = V ; var_b = var_1 else if ( var_i = 2 ) var_r = var_1 ; var_g = V ; var_b = var_3 else if ( var_i = 3 ) var_r = var_1 ; var_g = var_2 ; var_b = V else if ( var_i = 4 ) var_

21、r = var_3 ; var_g = var_1 ; var_b = V else var_r = V ; var_g = var_1 ; var_b = var_2 R = var_r * 255 /RGB results = From 0 to 255G = var_g * 255B = var_b * 255/*Range of HSL, HSB and HSV in popular applicationsApplications Space H Range S Range L/V/B RangePaint Shop Pro HSL 0 - 255 0 - 255 L 0 - 255

22、 Gimp HSV 0 - 360 0 - 100 V 0 - 100Photoshop HSV 0 - 360 0 - 100% B 0 - 100%Windows HSL 0 - 240 0 - 240 L 0 - 240Linux / KDE HSV 0 - 360 0 - 255 V 0 - 255GTK HSV 0 - 360 0 - 1.0 V 0 - 1.0Java (awt.Color) HSV 0 - 1.0 0 - 1.0 B 0 - 1.0Apple HSV 0 - 360 0 - 100% L 0 - 100%/*RGB CMY/RGB values = From 0

23、to 255C = 1 - ( R / 255 )M = 1 - ( G / 255 )Y = 1 - ( B / 255 )/*CMY RGB/CMY values = From 0 to 1R = ( 1 - C ) * 255G = ( 1 - M ) * 255B = ( 1 - Y ) * 255/*CMY CMYK/CMY values = From 0 to 1var_K = 1if ( C CMY/CMYK values = From 0 to 1C = ( C * ( 1 - K ) + K )M = ( M * ( 1 - K ) + K )Y = ( Y * ( 1 -

24、K ) + K )/*XYZ (Tristimulus) Reference values of a perfect reflecting diffuserObserver 2 (CIE 1931) 10 (CIE 1964)Illuminant X2 Y2 Z2 X10 Y10 Z10A (Incandescent) 109.850 100 35.585 111.144 100 35.200C 98.074 100 118.232 97.285 100 116.145D50 96.422 100 82.521 96.720 100 81.427D55 95.682 100 92.149 95.799 100 90.926D65 (Daylight) 95.047 100 108.883 94.811 100 107.304D75 94.972 100 122.638 94.416 100 120.641 F2 (Fluorescent) 99.187 100 67.395 103.280 100 69.026F7 95.044 100 108.755 95.792 100 107.687F11 100.966 100 64.370 103.866 100 65.627/*