Simple Image Processing - Grayscale (C#)

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/* * Created by SharpDevelop. * User: wai * Date: 2/9/2012 * Time: 21:09 * * To change this template use Tools | Options | Coding | Edit Standard Headers. / */ using System; using System.Collections.Generic; using System.Drawing; using System.Windows.Forms; using System.ComponentModel; namespace PictureBox_Test { /// <summary> /// Description of MainForm. /// </summary> public partial class MainForm : Form { PictureBox imageControl; public MainForm() { // // The InitializeComponent() call is required for Windows Forms designer support. // InitializeComponent(); this.Size = new Size(400,300); imageControl = new PictureBox(); imageControl.ImageLocation = "http://blog-imgs-31-origin.fc2.com/h/a/n/hanmans/pachinkotokyo18.jpg"; imageControl.InitialImage = null; imageControl.Width = 400; imageControl.Height = 300; this.Controls.Add(imageControl); imageControl.LoadCompleted += PictureBox1_LoadCompleted; } private void PictureBox1_LoadCompleted(Object sender, AsyncCompletedEventArgs e) { Bitmap image = new Bitmap(imageControl.Image); imageControl.Image = SetGrayscale(image); } public Bitmap SetGrayscale(Bitmap image) { Bitmap bmap = image; Color c; for (int i = 0; i < bmap.Width; i++) { for (int j = 0; j < bmap.Height; j++) { c = bmap.GetPixel(i, j); byte gray = (byte)(.299 * c.R + .587 * c.G + .114 * c.B); bmap.SetPixel(i, j, Color.FromArgb(gray, gray, gray)); } } return bmap; } } }