所有顏色模式的相互轉(zhuǎn)換

1、XYZ > RGBvar_X = X / 100        /X from 0 to  95.047      (Observer = 2°, Illuminant = D65)var_Y = Y / 100        /Y from 0 to 100.000var_Z = Z / 100      &#

2、160; /Z from 0 to 108.883var_R = var_X *  3.2406 + var_Y * -1.5372 + var_Z * -0.4986var_G = var_X * -0.9689 + var_Y *  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 )

3、 ) - 0.055else                     var_R = 12.92 * var_Rif ( var_G > 0.0031308 ) var_G = 1.055 * ( var_G ( 1 / 2.4 ) ) - 0.055else            

4、         var_G = 12.92 * var_Gif ( var_B > 0.0031308 ) var_B = 1.055 * ( var_B ( 1 / 2.4 ) ) - 0.055else                     var_B = 12.92 * var_BR = va

5、r_R * 255G = var_G * 255B = var_B * 255 TopRGB > XYZvar_R = ( R / 255 )        /R from 0 to 255var_G = ( G / 255 )        /G from 0 to 255var_B = ( B / 255 )        /B from

6、 0 to 255if ( var_R > 0.04045 ) var_R = ( ( var_R + 0.055 ) / 1.055 ) 2.4else                   var_R = var_R / 12.92if ( var_G > 0.04045 ) var_G = ( ( var_G + 0.055 ) / 1.055 ) 2.4else

7、0;                  var_G = var_G / 12.92if ( var_B > 0.04045 ) var_B = ( ( var_B + 0.055 ) / 1.055 )  2.4else                &

8、#160;  var_B = var_B / 12.92var_R = var_R * 100var_G = var_G * 100var_B = var_B * 100/Observer. = 2°, Illuminant = D65X = var_R * 0.4124 + 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

9、 * 0.9505 TopXYZ > 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 ) TopYxy > XYZ/Y from 0 to 100/x from 0 to 1/y from 0

10、 to 1X = x * ( Y / y )Y = YZ = ( 1 - x - y ) * ( Y / y ) TopXYZ > 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 ) ) TopHunter-Lab > XYZvar_Y = (H)L / 10var_X = (H)a / 17.5 * (H)L / 10var_Z = (H)b / 7 * (H)L /

11、10Y = var_Y 2X = ( var_X + Y ) / 1.02Z = -( var_Z - Y ) / 0.847 TopXYZ > CIE-L*abvar_X = X / ref_X          /ref_X =  95.047   Observer= 2°, Illuminant= D65var_Y = Y / ref_Y          

12、;/ref_Y = 100.000var_Z = Z / ref_Z          /ref_Z = 108.883if ( var_X > 0.008856 ) var_X = var_X ( 1/3 )else                    var_X = ( 7.787 *

13、var_X ) + ( 16 / 116 )if ( var_Y > 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

14、0;                   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 ) TopCIE-L*ab > XYZvar_Y = ( CIE-L* + 16 ) / 116v

15、ar_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 =

16、var_X3else                      var_X = ( var_X - 16 / 116 ) / 7.787if ( var_Z3 > 0.008856 ) var_Z = var_Z3else              &#

17、160;       var_Z = ( var_Z - 16 / 116 ) / 7.787X = ref_X * var_X     /ref_X =  95.047     Observer= 2°, Illuminant= D65Y = ref_Y * var_Y     /ref_Y = 100.000Z = ref_Z * var_Z   

18、60; /ref_Z = 108.883TopCIE-L*ab > CIE-L*CH°var_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* = CI

19、E-L*CIE-C* = sqrt( CIE-a* 2 + CIE-b* 2 )CIE-H° = var_H TopCIE-L*CH° >CIE-L*ab/CIE-H° from 0 to 360°CIE-L* = CIE-L*CIE-a* = cos( degree_2_radian( CIE-H° ) ) * CIE-C*CIE-b* = sin( degree_2_radian( CIE-H° ) ) * CIE-C* TopXYZ > CIE-L*uvvar_U = ( 4 * X ) / (

20、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                   &

21、#160;var_Y = ( 7.787 * var_Y ) + ( 16 / 116 )ref_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

22、 + ( 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 ) TopCIE-L*uv > XYZvar_Y = ( CIE-L* + 16 ) / 116if ( var_Y3 > 0.008856 ) var_Y = var_Y3else        &#

23、160;             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 *

24、 ref_Z ) )ref_V = ( 9 * ref_Y ) / ( ref_X + ( 15 * ref_Y ) + ( 3 * 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 )

25、Z = ( 9 * Y - ( 15 * var_V * Y ) - ( var_V * X ) ) / ( 3 * var_V ) TopRGB > HSLvar_R = ( R / 255 )                     /RGB from 0 to 255var_G = ( G / 255 )var_B = ( B / 255 )va

26、r_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&#

27、160;) / 2if ( del_Max = 0 )                     /This is a gray, no chroma.   H = 0               &#

28、160;                /HSL results from 0 to 1   S = 0else                        

29、            /Chromatic data.   if ( L < 0.5 ) S = del_Max / ( var_Max + var_Min )   else           S = del_Max / ( 2 - var_Max - var

30、_Min )   del_R = ( ( ( var_Max - var_R ) / 6 ) + ( del_Max / 2 ) ) / del_Max   del_G = ( ( ( var_Max - var_G ) / 6 ) + ( del_Max / 2 ) ) / del_Max   del_B = ( ( ( var_Max - var_B ) / 6 ) + ( del_Max / 2 ) ) / del_Max

31、0;  if      ( var_R = var_Max ) H = del_B - del_G   else if ( var_G = var_Max ) H = ( 1 / 3 ) + del_R - del_B   else if ( var_B = var_Max ) H = ( 2 / 3 ) + del_G - del_R  

32、; if ( H < 0 ) H += 1   if ( H > 1 ) H -= 1 TopHSL > RGBif ( S = 0 )                       /HSL from 0 to 1   R

33、 = L * 255                      /RGB results from 0 to 255   G = L * 255   B = L * 255else   if ( L < 0.5 ) var_2 = L * (

34、1 + S )   else           var_2 = ( L + S ) - ( S * L )   var_1 = 2 * L - var_2   R = 255 * Hue_2_RGB( var_1, var_2, H + ( 1 / 3 ) )    G = 255 * Hue_2

35、_RGB( var_1, var_2, H )   B = 255 * Hue_2_RGB( var_1, var_2, H - ( 1 / 3 ) ) Hue_2_RGB( v1, v2, vH )             /Function Hue_2_RGB   if ( vH < 0 ) vH += 1   if ( vH > 1 ) v

36、H -= 1   if ( ( 6 * vH ) < 1 ) return ( v1 + ( v2 - v1 ) * 6 * vH )   if ( ( 2 * vH ) < 1 ) return ( v2 )   if ( ( 3 * vH ) < 2 ) return ( v1 + ( v2 - v1 ) * ( ( 2 / 3 ) - vH ) * 6 )   return ( v1 )TopRGB > HSVvar_R = ( R /

37、 255 )                     /RGB from 0 to 255var_G = ( 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

38、 )    /Max. value of RGBdel_Max = var_Max - var_Min             /Delta RGB value V = var_Maxif ( del_Max = 0 )                 

39、60;   /This is a gray, no chroma.   H = 0                                /HSV results from 0 to 1 &#

40、160; S = 0else                                    /Chromatic data.   S = del_Max / var_Max 

41、0; del_R = ( ( ( var_Max - var_R ) / 6 ) + ( del_Max / 2 ) ) / del_Max   del_G = ( ( ( var_Max - var_G ) / 6 ) + ( del_Max / 2 ) ) / del_Max   del_B = ( ( ( var_Max - var_B ) / 6 ) + ( del_Max / 2 ) ) / del_Max   if 

42、0;    ( var_R = var_Max ) H = del_B - del_G   else if ( var_G = var_Max ) H = ( 1 / 3 ) + del_R - del_B   else if ( var_B = var_Max ) H = ( 2 / 3 ) + del_G - del_R   if ( H &l

43、t; 0 ) H += 1   if ( H > 1 ) H -= 1 TopHSV > RGBif ( S = 0 )                       /HSV from 0 to 1   R = V * 255  

44、; G = V * 255   B = V * 255else   var_h = H * 6   if ( var_h = 6 ) var_h = 0      /H must be < 1   var_i = int( var_h )             /Or .

45、 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 - ( var_h - var_i ) ) )   if      ( var_

46、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 &#

47、160;  else if ( var_i = 3 ) var_r = var_1 ; var_g = var_2 ; var_b = V        else if ( var_i = 4 ) var_r = var_3 ; var_g = var_1 ; var_b = V        else          

48、60;         var_r = V      var_g = var_1 ; var_b = var_2    R = var_r * 255                  /RGB results from 0 to 255   G = var_g * 255   B = var_b * 255 TopRange of HSL, HSB and HSV in popular applicationsApplicationsSpaceH RangeS RangeL/V/B RangePaint Shop ProHSL0 - 2550 - 255L0 - 255GimpHSV0 - 360°0 - 100V0 - 100PhotoshopHSV0 - 360°0 - 100%B0