VB.Net Tutorial/2D Graphics/Pixel

Set Pixel and get 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