1. Citra Grayscale
2. Citra Biner
3. Citra Rotate 180 derajat
4. Citra Negatif
5. Citra Brightness
Program juga dilengkapi dengan menu Open dan Save citra yang akan dan telah di olah.
Berikut design aplikasi sederhana pengolahan citra menggunakan VB Net
Tambahkan komponen menustrip (pada toolbox Menus & Toolbar), OpenFileDialog ( pada toolbox Dialog) dan SaveFileDialog (pada toolbox Dialog)
name dirubah menjadi OFDàOpenFileDialog
name dirubah menjadi SFDàSaveFileDialog
Isi menu
name dirubah menjadi OFDàOpenFileDialog
name dirubah menjadi SFDàSaveFileDialog
Isi menu
Listing program pengolahan citra menggunakan VB Net
Public Class Form1
Dim gambar As Bitmap
Private Sub OpenCitraToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OpenCitraToolStripMenuItem.Click
OFD.Filter = "BMP|*.bmp|JPG|*.Jpg"
OFD.ShowDialog()
If OFD.FileName = "" Then Exit Sub
PIC1.Image = Image.FromFile(OFD.FileName)
gambar = New Bitmap(PIC1.Image)
End Sub
Private Sub SaveCitraToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveCitraToolStripMenuItem.Click
SFD.Filter = "JPG|*.Jpg|BMP|*.bmp"
SFD.ShowDialog()
If SFD.FileName = "" Then Exit Sub
If SFD.FilterIndex = 1 Then
gambar.Save(SFD.FileName, System.Drawing.Imaging.ImageFormat.Jpeg)
End If
If SFD.FilterIndex = 2 Then
gambar.Save(SFD.FileName, System.Drawing.Imaging.ImageFormat.Bmp)
End If
End Sub
Private Sub GrayscaleToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles GrayscaleToolStripMenuItem.Click
Dim Pb, Pc As Integer
Dim Rt, vM, vH, vB As Double
With gambar
For Pb = 0 To .Height - 1
For Pc = 0 To .Width - 1
vM = .GetPixel(Pc, Pb).R
vH = .GetPixel(Pc, Pb).G
vB = .GetPixel(Pc, Pb).B
Rt = (vM + vH + vB) / 3
.SetPixel(Pc, Pb, Color.FromArgb(Rt, Rt, Rt))
Next
Pic2.Image = gambar
Pic2.Refresh()
Next
End With
End Sub
Private Sub NegatifToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NegatifToolStripMenuItem.Click
Dim Pb, Pc As Integer
Dim vM, vH, vB As Double
With gambar
For Pb = 0 To .Height - 1
For Pc = 0 To .Width - 1
vM = 255 - .GetPixel(Pc, Pb).R
vH = 255 - .GetPixel(Pc, Pb).G
vB = 255 - .GetPixel(Pc, Pb).B
If vM <= 0 Then vM = 0
If vB <= 0 Then vB = 0
If vH <= 0 Then vH = 0
.SetPixel(Pc, Pb, Color.FromArgb(vM, vH, vB))
Next
Pic2.Image = gambar
Pic2.Refresh()
Next
End With
End Sub
Private Sub BrigtnessToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BrigtnessToolStripMenuItem.Click
Dim Pb, Pc As Integer
Dim vM, vH, vB As Double
With gambar
For Pb = 0 To .Height - 1
For Pc = 0 To .Width - 1
vM = .GetPixel(Pc, Pb).R + 5
vH = .GetPixel(Pc, Pb).G + 5
vB = .GetPixel(Pc, Pb).B + 5
If vM > 255 Then vM = 255
If vB > 255 Then vB = 255
If vH > 255 Then vH = 255
.SetPixel(Pc, Pb, Color.FromArgb(vM, vH, vB))
Next
Pic2.Image = gambar
Pic2.Refresh()
Next
End With
End Sub
Private Sub ToolStripMenuItem2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripMenuItem2.Click
gambar = New Bitmap(Pic1.Image)
End Sub
Private Sub KeluarToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KeluarToolStripMenuItem.Click
End
End Sub
Private Sub BinerToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BinerToolStripMenuItem.Click
Dim Pb, Pc As Integer
Dim rata, vM, vH, vB As Double
With gambar
For Pb = 0 To .Height - 1
For Pc = 0 To .Width - 1
vM = .GetPixel(Pc, Pb).R
vH = .GetPixel(Pc, Pb).G
vB = .GetPixel(Pc, Pb).B
rata = (vM + vH + vB) / 3
If (rata < 128) Then
vM = 0
vH = 0
vB = 0
Else
vM = 255
vH = 255
vB = 255
End If
.SetPixel(Pc, Pb, Color.FromArgb(vM, vH, vB))
Next
Pic2.Image = gambar
Pic2.Refresh()
Next
End With
End Sub
Private Sub RotateToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RotateToolStripMenuItem.Click
Dim Pb, Pc As Integer
Dim vM, vH, vB As Double
Dim gambar3 As Bitmap = New Bitmap(Pic1.Image)
With gambar
For Pb = .Height - 1 To 0 Step -1
For Pc = .Width - 1 To 0 Step -1
vM = .GetPixel(Pc, Pb).R
vH = .GetPixel(Pc, Pb).G
vB = .GetPixel(Pc, Pb).B
gambar3.SetPixel(.Width - 1 - Pc, .Height - 1 - Pb, Color.FromArgb(vM, vH, vB))
Next
Pic2.Image = gambar3
Pic2.Refresh()
Next
End With
gambar = gambar3
End Sub
End Class
Citra Negati
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