Image Filter Effect 1 : Image Filter « 2D Graphics « VB.Net Tutorial

1. VB.Net Tutorial
2. 2D Graphics
3. Image Filter

'Visual Basic.Net JingCai Programming 100 Examples
'Author: Yong Zhang
'Publisher: Water Publisher China
'ISBN: 750841156

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

public class ImageFilter1
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class

Public Class Form1
    Inherits System.Windows.Forms.Form

    Public Sub New()
        MyBase.New()
        InitializeComponent()

    End Sub

    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    Private components As System.ComponentModel.IContainer

    Friend WithEvents PictureBox1 As System.Windows.Forms.PictureBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.PictureBox1 = New System.Windows.Forms.PictureBox
        Me.Button1 = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'PictureBox1
        '
        Me.PictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.PictureBox1.Dock = System.Windows.Forms.DockStyle.Top
        Me.PictureBox1.Image = Image.FromFile("YourFile.bmp")
        Me.PictureBox1.Location = New System.Drawing.Point(0, 0)
        Me.PictureBox1.Name = "PictureBox1"
        Me.PictureBox1.Size = New System.Drawing.Size(368, 248)
        Me.PictureBox1.TabIndex = 0
        Me.PictureBox1.TabStop = False
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(72, 280)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(64, 32)
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "Effect 1"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(368, 326)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.PictureBox1)
        Me.ResumeLayout(False)

    End Sub

    Dim i, j, rr, gg, bb, r, g, b, a As Integer
    Dim c, cc, cd As System.Drawing.Color
    Dim pic1 As System.Drawing.Bitmap

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        pic1 = PictureBox1.Image
        Dim rr1, gg1, bb1, rr2, gg2, bb2, r1, r2, r3, b1, b2, b3, g1, g2, g3 As Integer
        For j = 0 To PictureBox1.Size.Width - 1
            For i = 0 To PictureBox1.Size.Height - 1
                c = pic1.GetPixel(j, i)
                r1 = c.R
                g1 = c.G
                b1 = c.B
                a = c.A
                cc = pic1.GetPixel(j + 1, i)
                r2 = cc.R
                g2 = cc.G
                b2 = cc.B
                cd = pic1.GetPixel(j, i + 1)
                r3 = cd.R
                g3 = cd.G
                b3 = cd.B
                rr1 = (r1 - r2) ^ 2
                rr2 = (r1 - r3) ^ 2
                rr = 2 * (rr1 + rr2) ^ 0.5
                gg1 = (g1 - g2) ^ 2
                gg2 = (g1 - g3) ^ 2
                gg = 2 * (gg1 + gg2) ^ 0.5
                bb1 = (b1 - b2) ^ 2
                bb2 = (b1 - b3) ^ 2
                bb = 2 * (bb1 + bb2) ^ 0.5
                If rr < 0 Then rr = 0
                If rr > 255 Then rr = 255
                If gg < 0 Then gg = 0
                If gg > 255 Then gg = 255
                If bb < 0 Then bb = 0
                If bb > 255 Then bb = 255
                c = Color.FromArgb(a, rr, gg, bb)
                pic1.SetPixel(j, i, c)
            Next
            PictureBox1.Refresh()
        Next
    End Sub

End Class