Set Pixel and get Pixel : Pixel « 2D Graphics « VB.Net Tutorial

1. VB.Net Tutorial
2. 2D Graphics
3. Pixel

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms

public class GetPixelSetPixel
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class

public class Form1
  Inherits System.Windows.Forms.Form

  Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
        Dim g As Graphics = Me.CreateGraphics()
        g.Clear(Me.BackColor)

        Dim curBitmap As New Bitmap("yourfile.jpg")

        g.DrawImage(curBitmap, 0, 0, curBitmap.Width, curBitmap.Height)

        Dim startTime As DateTime = DateTime.Now

        Dim i As Integer
        For i = 0 To 100
            Dim j As Integer
            For j = 0 To 200
                Dim curColor As Color = curBitmap.GetPixel(i, j)
                Dim ret As Integer = CInt((CInt(curColor.R) + CInt(curColor.G) + CInt(curColor.B)) / 3)
                curBitmap.SetPixel(i, j, Color.FromArgb(ret, ret, ret))
            Next j
        Next i

        g.DrawImage(curBitmap, 0, 0, curBitmap.Width, curBitmap.Height)
        g.Dispose()
  End Sub

  Public Sub New()
   
    MyBase.New()
    Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
    Me.ClientSize = New System.Drawing.Size(292, 273)
    Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen

  End Sub

End Class