'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
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
Dim rr, gg, bb, i, j, a, r1, r2, b1, b2, g1, g2 As Integer
pic1 = PictureBox1.Image
For j = 0 To PictureBox1.Size.Height - 1
For i = 0 To PictureBox1.Size.Width - 1
c = pic1.GetPixel(i, j)
r1 = c.R
g1 = c.G
b1 = c.B
cc = pic1.GetPixel(i + 1, j + 1)
r2 = cc.R
g2 = cc.G
b2 = cc.B
rr = r2 - r1 + 128
gg = g2 - g1 + 128
bb = b2 - b1 + 128
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(i, j, c)
Next
PictureBox1.Refresh()
Next
End Sub
End Class