图片饱和度更改，c#，winform

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我是靠谱客的博主顺利唇彩，最近开发中收集的这篇文章主要介绍图片饱和度更改，c#，winform，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

c#中Bitmap的颜色是RGB，需要转换为HSV之后进行处理。

xa，ya是饱和度调整的起点坐标，xb，yb是饱和度调整的起点坐标。
trackBar2是饱和度调整的滑动条，把50设为原点。


 private Bitmap Baohedu(Bitmap oop, int xa, int xb, int ya, int yb)
        {
            Bitmap nop;
            nop = oop.Clone() as Bitmap;

            double degree = trackBar2.Value / 50;
            int x, y;
            Color pixel;
            double R = 0, G = 0, B = 0, H = 0, S = 0, V = 0;
            double max = 0, min = 0;
            for (x = xa; x < xb; x++)
            {
                for (y = ya; y < yb; y++)
                {
                    pixel = oop.GetPixel(x, y);
                    R = (double)pixel.R;
                    G = (double)pixel.G;
                    B = (double)pixel.B;
                    R = R / 100; G = G / 100; B = B / 100;
                    max = Max(R, G, B);
                    min = Min(R, G, B);
                    V = max;
                    if (max == 0) S = 0;
                    else S = 1 - (min / max);
                    if (max == min) H = 0;
                    else if (max == R && G >= B) H = 60 * ((G - B) / (max - min));
                    else if (max == R && G < B) H = 60 * ((G - B) / (max - min)) + 360;
                    else if (max == G) H = 60 * ((B - R) / (max - min)) + 120;
                    else if (max == B) H = 60 * ((R - G) / (max - min)) + 240;
                    V = V * 100; S = S * 100; S = S * degree;
                    if (S >= 100) S = 100;
                    double C = 0, X = 0, Y = 0, Z = 0;
                    int i = 0;
                    S = S / 100.0;
                    V = V / 100.0;
                    if (S == 0) R = G = B = V;
                    else
                    {
                        H = H / 60;
                        i = (int)H;
                        C = H - i;
                        X = V * (1.0 - S);
                        Y = V * (1 - S * C);
                        Z = V * (1 - S * (1 - C));
                        switch (i)
                        {
                            case 0: R = V; G = Z; B = X; break;
                            case 1: R = Y; G = V; B = X; break;
                            case 2: R = X; G = V; B = Z; break;
                            case 3: R = X; G = Y; B = V; break;
                            case 4: R = Z; G = X; B = V; break;
                            case 5: R = V; G = X; B = Y; break;
                        }

                    }

                    R = R * 100; G = G * 100; B = B * 100;
                    if (G >= 255) G = 255;
                    if (R >= 255) R = 255;
                    if (B >= 255) B = 255;
                    if (G <= 0) G = 0;
                    if (R <= 0) R = 0;
                    if (B <= 0) B = 0;

                    nop.SetPixel(x, y, Color.FromArgb((int)R, (int)G, (int)B));
                }
            }
            return nop;
        }
 private double Max(double a, double b, double c)
        {
            double max = 0;
            max = a;
            if (max < b)
                max = b;
            if (max < c)
                max = c;
            return max;
        }
 private double Min(double a, double b, double c)
        {
            double min = 0;
            min = a;
            if (min > b)
                min = b;
            if (min > c)
                min = c;
            return min;
        }

Easy_Example1.rar_winfrom对比度饱和度亮度调整-图像处理文档类资源-CSDN下载

这里的示例包括了这个功能。