Mega Code Archive
Invert an Image
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Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
Imports System.Math
public class RevertImage
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 bm As New Bitmap("yourfile.jpg")
e.Graphics.DrawImage(bm, 0, 0, 400, 400)
Dim dest_bm As New Bitmap("yourfile.jpg")
InvertImage(dest_bm)
e.Graphics.DrawImage(dest_bm, 400, 0, 400, 400)
End Sub
Private Sub InvertImage(ByVal bm As Bitmap)
For y As Integer = 0 To bm.Height - 1
For x As Integer = 0 To bm.Width - 1
Dim clr As Color = bm.GetPixel(x, y)
clr = Color.FromArgb(255,255 - clr.R, 255 - clr.G, 255 - clr.B)
bm.SetPixel(x, y, clr)
Next x
Next y
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
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