Use Color Matrix to gray the image : Color Matrix « 2D Graphics « C# / C Sharp

Home
C# / C Sharp
1.2D Graphics
2.Class Interface
3.Collections Data Structure
4.Components
5.Data Types
6.Database ADO.net
7.Date Time
8.Design Patterns
9.Development Class
10.Event
11.File Stream
12.Generics
13.GUI Windows Form
14.Internationalization I18N
15.Language Basics
16.LINQ
17.Network
18.Office
19.Reflection
20.Regular Expressions
21.Security
22.Services Event
23.Thread
24.Web Services
25.Windows
26.Windows Presentation Foundation
27.XML
28.XML LINQ
C# / C Sharp » 2D Graphics » Color MatrixScreenshots 
Use Color Matrix to gray the image
Use Color Matrix to gray the image
 

  using System;
  using System.Drawing;
  using System.Drawing.Drawing2D;
  using System.Collections;
  using System.ComponentModel;
  using System.Windows.Forms;
  using System.Data;
  using System.Drawing.Imaging;

  public class Form1 : System.Windows.Forms.Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    private void InitializeComponent()
    {
      this.AutoScaleBaseSize = new System.Drawing.Size(513);
      this.ClientSize = new System.Drawing.Size(292273);
      this.Text = "";
      this.Resize += new System.EventHandler(this.Form1_Resize);
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);

    }
    static void Main() 
    {
      Application.Run(new Form1());
    }

    private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {      
      Graphics g = e.Graphics;
      Bitmap bmp = new Bitmap("winter.jpg");
      g.FillRectangle(Brushes.White, this.ClientRectangle);

      // Create a color matrix
      // The value 0.6 in row 4, column 4 specifies the alpha value
      float[][] matrixItems = {
                                new float[] {10000},
                                new float[] {01000},
                                new float[] {00100},
                                new float[] {0000.6f0}
                                new float[] {00001}};
      ColorMatrix colorMatrix = new ColorMatrix(matrixItems);

      // Create an ImageAttributes object and set its color matrix
      ImageAttributes imageAtt = new ImageAttributes();
      imageAtt.SetColorMatrix(
        colorMatrix,
        ColorMatrixFlag.Default,
        ColorAdjustType.Bitmap);

      // Now draw the semitransparent bitmap image.
      g.DrawImage(bmp, this.ClientRectangle, 0.0f0.0f, bmp.Width, bmp.Height, 
                  GraphicsUnit.Pixel, imageAtt);

      imageAtt.Dispose();
    }

    private void Form1_Resize(object sender, System.EventArgs e)
    {
      Invalidate();
    }
  }


           
         
  
Related examples in the same category
1.Image manipulation using ColorMatrix
2.A color converter class
java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.