Image image = new Bitmap("InputColor.bmp");
ImageAttributes imageAttributes = new ImageAttributes();
int width = image.Width;
int height = image.Height;

float[][] colorMatrixElements = { 
   new float[] {2,  0,  0,  0, 0},        // red scaling factor of 2
   new float[] {0,  1,  0,  0, 0},        // green scaling factor of 1
   new float[] {0,  0,  1,  0, 0},        // blue scaling factor of 1
   new float[] {0,  0,  0,  1, 0},        // alpha scaling factor of 1
   new float[] {.2f, .2f, .2f, 0, 1}};    // three translations of 0.2

ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements);

imageAttributes.SetColorMatrix(
   colorMatrix,
   ColorMatrixFlag.Default,
   ColorAdjustType.Bitmap);

e.Graphics.DrawImage(image, 10, 10);

e.Graphics.DrawImage(
   image,
   new Rectangle(120, 10, width, height),  // destination rectangle 
   0, 0,        // upper-left corner of source rectangle 
   width,       // width of source rectangle
   height,      // height of source rectangle
   GraphicsUnit.Pixel,
   imageAttributes);

//引入命名空间
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Text;
using System.Drawing.Printing;
using System.Drawing.Drawing2D;
using System.Text;
using System.Windows.Forms;

public class Form1 : Form {

    protected override void OnPaint(PaintEventArgs e) {
        Bitmap bmp = new Bitmap("alphabet.gif");
        Graphics g = e.Graphics;

        float[][] matrixItems = {
                    new float[] {0.2f, 0, 0, 0, 0},
                    new float[] {0, 0.8f, 0, 0, 0},
                    new float[] {0, 0, 1, 0, 0},
                    new float[] {0, 0, 0, 1, 0}, 
                    new float[] {0, 0, 0, 0, 1}};
        ColorMatrix colorMatrix = new ColorMatrix(matrixItems);

        ImageAttributes imageAtt = new ImageAttributes();
        imageAtt.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);

        TextureBrush tb = new TextureBrush(bmp, new Rectangle(0, 0, bmp.Width, bmp.Height), imageAtt);
        tb.WrapMode = WrapMode.Tile;
        g.FillRectangle(tb, this.ClientRectangle);
        bmp.Dispose();
        tb.Dispose();
    }
    public static void Main() {
        Application.Run(new Form1());
    }
}