颜色值LAB转RGB

DuSuCyy 发表于 2022-11-13 01:42

最近在做一个关于颜料的项目，其中涉及到LAB转RGB，
这是一个涉及到几条算法的项目，老板见我是新人，以为我做不出来，然后我不服，
经过一天的了解加上代码量也不多，最后一天时间就完成了，下面分享一下，不过写的不好，不要见怪

   Double L =pfgl.getPfglLabl();
   Double A =pfgl.getPfglLaba();
   Double B =pfgl.getPfglLabb();

   Double YY =(L+16)/116;
   Double XX =(L+16)/116+A/500;
   Double ZZ =(L+16)/116-B/200;

/*    double Xn = 94.83;
   double Yn = 100.0;
   double Zn = 107.38; */
   double Xn = 94.83;
   double Yn = 100.0;
   double Zn = 107.38;
/*    double o =6;
   double p =29;*/
   Double D = Double.valueOf(0.206893);

   double Y = 0;
   double X = 0;
   double Z = 0;

   if (YY>D){
         Y = Yn * Math.pow(YY,3.0);
   }
   else {
         double C = 7.787;
         double G = Double.valueOf(0.13793103448275862);
         Y = Yn * (YY - G) / C;
   }
   if (XX>D){
         X = Xn * Math.pow(XX,3.0);
   }
   else {
         double C = 7.787;
         double G = Double.valueOf(0.13793103448275862);
         X = Xn * (XX - G) / C;
   }
   if (ZZ>D){
         Z = Zn * Math.pow(ZZ,3.0);
   }
   else {
         double C = 7.787;
         double G = Double.valueOf(0.13793103448275862);
         Z =Zn * (ZZ - G) / C;
   }
   //X, Y and Z input refer to a D65/2° standard illuminant.
//sR, sG and sB (standard RGB) output range = 0 ÷ 255

/*    Double var_X;
   Double var_Y;
   Double var_Z;*/
   Double var_X = X * 242.36628;
   Double var_Y = Y * 255;
   Double var_Z = Z * 277.63227;
   Double var_R;
   Double var_G;
   Double var_B;

      var_X = X / 100;
      var_Y = Y / 100;
      var_Z = Z / 100;

   var_R = var_X *3.2406 + var_Y * -1.5372 + var_Z * -0.4986;
   var_G = var_X * -0.9689 + var_Y *1.8758 + var_Z *0.0415;
   var_B = var_X *0.0557 + var_Y * -0.2040 + var_Z *1.0570;
/*    var_R = var_X * 0.412453 + var_Y * 0.357580 + var_Z * 0.180423;
   var_G = var_X * 0.212671 + var_Y * 0.715160 + var_Z * 0.072169;
   var_B = var_X * 0.019334 + var_Y * 0.119193 + var_Z * 0.950227;*/

   if ( var_R > 0.0031308 ) var_R = 1.055 * ( Math.pow(var_R , ( 1 / 2.4 )) ) - 0.055;
   else                   var_R = 12.92 * var_R;
   if ( var_G > 0.0031308 ) var_G = 1.055 * ( Math.pow(var_G , ( 1 / 2.4 )) ) - 0.055;
   else                   var_G = 12.92 * var_G;
   if ( var_B > 0.0031308 ) var_B = 1.055 * ( Math.pow(var_B , ( 1 / 2.4 )) ) - 0.055;
   else                   var_B = 12.92 * var_B;

/*    double sR = var_R * 255.0;
   double sG = var_G * 255.0;
   double sB = var_B * 255.0;*/

   Integer sR = (int) Math.round(var_R * 255);
   Integer sG = (int) Math.round(var_G * 255);
   Integer sB = (int) Math.round(var_B * 255);

   Integer cR;
   Integer cG;
   Integer cB;

      cR = sR >= 255 ? 255 : sR;
      cG = sG >= 255 ? 255 : sG;
      cB = sB >= 255 ? 255 : sB;
      cR = sR < 0 ? 0 : sR;
      cG = sG < 0 ? 0 : sG;
      cB = sB < 0 ? 0 : sB;

   String DOU = "RGB"+"("+ cR + "," + cG + "," + cB +")";
   pfgl.setPfglYs(DOU);

有最近学习算法的各位，可以带我一下，本人后端新人小子一个

吾爱石皮姐 发表于 2022-11-13 09:00

感谢分享~{:1_927:}

rhci 发表于 2022-11-13 09:36

学习了，感谢大佬。

_nut_ 发表于 2022-12-11 09:28

本帖最后由 _nut_ 于 2022-12-11 09:40 编辑

厉害，受教了

_nut_ 发表于 2022-12-11 13:24

兄弟，我开了一个帖子，可以分享一下若依的视频吗

DuSuCyy 发表于 2022-12-11 13:28

_nut_ 发表于 2022-12-11 13:24
兄弟，我开了一个帖子，可以分享一下若依的视频吗

已发，你这边看下

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颜色值LAB转RGB