PENGOLAHAN CITRA

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

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 Biner

Citra Negatif



Citra Rotate 180 derajat