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

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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

Hasil program

Citra Biner


Citra Negatif



Citra Rotate 180 derajat