颜色值LAB转RGB

DuSuCyy

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

[Java] 纯文本查看 复制代码

        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

感谢分享~

rhci

学习了，感谢大佬。

_nut_

厉害，受教了

_nut_

兄弟，我开了一个帖子，可以分享一下若依的视频吗

DuSuCyy

_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