c# 光学三原色混合，颜色叠加-dong

东的备注:

光的三原色:红、绿、蓝

红+绿=黄

红+蓝=品红

蓝+绿=青

红+绿+蓝=白

无颜色为黑

下看代码

            Bitmap image1 = new Bitmap(500, 500);//红
            Bitmap image2 = new Bitmap(500, 500);//绿
            Bitmap image3 = new Bitmap(500, 500);//蓝
            Bitmap image4 = new Bitmap(500, 500);//混合
            Random ran = new Random();

            Graphics g = Graphics.FromImage(image1);
            SolidBrush brush = new SolidBrush(Color.FromArgb(255,255,0,0));//请勿使用Color.Red 混合后存在色差
            SolidBrush brushBackGroud = new SolidBrush(Color.FromArgb(255, 0, 0, 0));
            g.FillRectangle(brushBackGroud, new Rectangle(0, 0, 500, 500));
            for (int i = 0; i < 10; i++)
            {
               int x= ran.Next(10, 490);
               int y = ran.Next(10, 490);
               int width = 80;
               int height = 80;
               g.FillEllipse(brush,x,y,width,height);
            }
            g = Graphics.FromImage(image2);
            brush = new SolidBrush(Color.FromArgb(255, 0, 255, 0));//请勿使用Color.Green 混合后存在色差
            brushBackGroud = new SolidBrush(Color.FromArgb(255, 0, 0, 0));
            g.FillRectangle(brushBackGroud, new Rectangle(0, 0, 500, 500));
            for (int i = 0; i < 10; i++)
            {
                int x = ran.Next(10, 490);
                int y = ran.Next(10, 490);
                int width = 80;
                int height = 80;
                g.FillEllipse(brush, x, y, width, height);
            }
            g = Graphics.FromImage(image3);
            brush = new SolidBrush(Color.FromArgb(255, 0, 0, 255));//请勿使用Color.Blue 混合后存在色差
            brushBackGroud = new SolidBrush(Color.FromArgb(255, 0, 0, 0));
            g.FillRectangle(brushBackGroud, new Rectangle(0, 0, 500, 500));
            for (int i = 0; i < 10; i++)
            {
                int x = ran.Next(10, 490);
                int y = ran.Next(10, 490);
                int width = 80;
                int height = 80;
                g.FillEllipse(brush, x, y, width, height);
            }
           //混合
            for (int i = 0; i < 500; i++)
            {
                for (int j = 0; j < 500; j++)
                {
                   image4.SetPixel(i, j, Color.FromArgb(255, image1.GetPixel(i, j).R > 128 ? 255 : 0, image2.GetPixel(i, j).G > 128 ? 255 : 0, image3.GetPixel(i, j).B > 128 ? 255 : 0));
                }
            }
            pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
            pictureBox1.Image = image1;
            pictureBox2.SizeMode = PictureBoxSizeMode.Zoom;
            pictureBox2.Image = image2;
            pictureBox3.SizeMode = PictureBoxSizeMode.Zoom;
            pictureBox3.Image = image3;
            pictureBox4.SizeMode = PictureBoxSizeMode.Zoom;
            pictureBox4.Image = image4;

最终实现效果

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