1. Menu utama (main_form.vb)

(1)

SOURCE CODE

Public Class main_form 'deklarasi class main_form

'toolstripmenuitem : control component menu

Private Sub EkstraksiToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

EkstraksiToolStripMenuItem.Click

Ekstraksi.Show() 'membuka form Ekstraksi End Sub

Private Sub WatermarkingToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

WatermarkingToolStripMenuItem.Click

rsppmc.Show() 'membuka form watermarking rsppmc End Sub

Private Sub DokumentasiToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

DokumentasiToolStripMenuItem.Click help.Show() 'membuka form help End Sub

Private Sub AboutMeToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

AboutMeToolStripMenuItem.Click

About.Show() 'membuka form about End Sub

Private Sub KeluarToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

KeluarToolStripMenuItem.Click

End 'menghentikan/menutup program aplikasi End Sub

Private Sub WatermarkjngToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

WatermarkjngToolStripMenuItem.Click

laporan.Show() 'membuka form laporan hasil watermarking End Sub

Private Sub EkstraksiToolStripMenuItem1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

EkstraksiToolStripMenuItem1.Click

lap_ekstraksi.Show() 'membuka form laporan hasil Ekstraksi End Sub

End Class 'akhir dari tag class

2.

Watermarking (rsppmc.vb)

(2)

Public Class rsppmc

Dim bmap, bmap_label, bmap_dct As Bitmap Dim str2ascii(), arrKey(,) As String Dim ranDom() As Integer

Dim matRed(,,), matGren(,,), matBlue(,,), arrGray(,), matBin(,,) As Integer

Dim matDct(,,), matTransform(,,), matTranspose(,,), matD(,,), matModif(,,), matInvers(,,), matHasil(,,) As Single

Private Function asc2Biner(ByVal ascii As String) Dim nAsc As Integer

nAsc = CInt(ascii)

If nAsc >= 0 And nAsc <= 255 Then Dim i, x, arrBin() As Integer ReDim arrBin(7)

x = 7

For i = 0 To 7

If nAsc > 1 Then

arrBin(x) = nAsc Mod 2 nAsc = Int(nAsc / 2) ElseIf nAsc = 1 Then arrBin(x) = nAsc nAsc = 0

Else

arrBin(x) = 0 End If

x = x - 1 Next

ascii = "" For i = 0 To 7

ascii = ascii + CStr(arrBin(i)) Next

End If

Return ascii End Function

Private Sub citraHost()

Dim Red, gren, blue As Integer

Dim host As New Bitmap(PictureBox1.Image)

If host.Width Mod 8 <> 0 And host.Height Mod 8 <> 0 Then Dim lebar, tinggi As Integer

lebar = host.Width - (host.Width Mod 8) tinggi = host.Height - (host.Height Mod 8)

bmap = New Bitmap(PictureBox1.Image, lebar, tinggi) Else

bmap = New Bitmap(PictureBox1.Image) End If

PictureBox1.Image = bmap

Dim tempbmap As New Bitmap(PictureBox1.Image) 'tempbmap = bmap

(3)

With tempbmap

Dim X, Y As Integer

ReDim matRed((.Width / 8) * (.Height / 8), 8, 8) ReDim matGren((.Width / 8) * (.Height / 8), 8, 8) ReDim matBlue((.Width / 8) * (.Height / 8), 8, 8) Dim mTemp, m, bar, kol As Integer

progresBarStatus.Width = PictureBox1.Width progresBarStatus.Visible = True

mTemp = 1 bar = 1 kol = 1 m = 1

For Y = 0 To .Height - 1 Application.DoEvents() For X = 0 To .Width - 1

Red = CInt(.GetPixel(X, Y).R) gren = CInt(.GetPixel(X, Y).G) blue = CInt(.GetPixel(X, Y).B)

matRed(m, bar, kol) = Red matGren(m, bar, kol) = gren matBlue(m, bar, kol) = blue

If kol = 8 And X <> (.Width - 1) Then kol = 1

m = m + 1

ElseIf kol = 8 And X = (.Width - 1) Then kol = 1

m = mTemp Else

kol = kol + 1 End If

blue = 10

bmap.SetPixel(X, Y, Color.FromArgb(Red, gren, blue))

m = mTemp Else

m = mTemp End If

If bar = 8 Then bar = 1 Else

bar = bar + 1 End If

If (Y + 1) Mod 8 = 0 Then PictureBox1.Invalidate()

(4)

progresBarStatus.Value = Int(100 * Y / (bmap.Height - 1))

End If

PictureBox1.Refresh() Next

End With

Me.Text = "Proses Citra Host Berhasil" progresBarStatus.Visible = False

End Sub

Private Sub citraLabel()

Dim Red, gren, blue, tMin, tMax, tHold As Integer 'bmap_label = New Bitmap(PictureBox2.Image)

Dim Label As New Bitmap(PictureBox2.Image)

If Label.Width <> bmap.Width / 8 And Label.Height <> bmap.Height / 8 Then

bmap_label = New Bitmap(PictureBox2.Image, bmap.Width / 8, bmap.Height / 8)

Else

bmap_label = New Bitmap(PictureBox2.Image) End If

PictureBox2.Image = bmap_label

Dim tempbmap As New Bitmap(PictureBox2.Image)

With tempbmap

Dim X, Y As Integer

ReDim arrGray(.Width, .Height)

tMin = 0 tMax = 0

For Y = 0 To tempbmap.Height - 1 Application.DoEvents()

For X = 0 To tempbmap.Width - 1 Red = CInt(.GetPixel(X, Y).R) gren = CInt(.GetPixel(X, Y).G) blue = CInt(.GetPixel(X, Y).B)

arrGray(X, Y) = CInt((Red + gren + blue) / 3)

bmap_label.SetPixel(X, Y,

Color.FromArgb(arrGray(X, Y), arrGray(X, Y), arrGray(X, Y))) 'cari nilai grey Min dan Max

If tMin = 0 And tMax = 0 Then tMin = arrGray(X, Y) tMax = arrGray(X, Y)

ElseIf arrGray(X, Y) > tMax Then tMax = arrGray(X, Y)

ElseIf arrGray(X, Y) < tMin Then tMin = arrGray(X, Y)

End If Next

(5)

PictureBox1.Invalidate()

Me.Text = "Proses Citra Label : " & Int(100 * Y / (bmap_label.Height - 1)).ToString & "%"

progresBarStatus.Value = Int(100 * Y / (bmap_label.Height - 1))

End If

tHold = (tMax + tMin) / 2 'hitung nilai treshold progresBarStatus.Width = PictureBox2.Width

progresBarStatus.Visible = True

ReDim matBin(.Width * .Height, 1, 1) Dim m As Integer

'inisialisasi nilai biner citra Dim binLabel, grey As Integer X = 0

Y = 0 m = 1

For Y = 0 To .Height - 1 For X = 0 To .Width - 1

grey = CInt(.GetPixel(X, Y).R) 'cari nilai grey Min dan Max If grey > tHold Then

grey = 255 'nilai 255 mewakili 1 binLabel = 1

Else

grey = 0 binLabel = -1 End If

matBin(m, 1, 1) = binLabel m = m + 1

bmap_label.SetPixel(X, Y, Color.FromArgb(grey, grey, grey)) 'simpan warna baru pada pixel(Y,X)

progresBarStatus.Value = Int(100 * Y / (bmap_label.Height - 1))

End If

Me.Text = "Progres Citra Biner Berhasil" progresBarStatus.Visible = False

End With End Sub

Private Sub matHasilBlue(ByVal m As Integer) Dim X, Y, lst As Integer

lst = 0

ListView3.Items.Clear() For X = 1 To 8

(6)

ListView3.Items.Add(X & "," & Y)

ListView3.Items(lst).SubItems.Add(matBlue(ranDom(m), X, Y))

ListView3.Items(lst).SubItems.Add(matModif(ranDom(m), X, Y))

ListView3.Items(lst).SubItems.Add(matD(ranDom(m), X, Y))

ListView3.Items(lst).SubItems.Add(Int(matHasil(ranDom(m), X, Y)))

lst = lst + 1 Next

Next End Sub

Private Sub koeDct() Dim X, Y As Integer Dim def, akar As Single ReDim matDct(1, 8, 8)

For X = 1 To 8 For Y = 1 To 8

If X - 1 = 0 Then

akar = 1 / Math.Sqrt(8) Else

def = (((2 * (Y - 1)) + 1) * ((X - 1) * Math.PI)) / 16

akar = Math.Sqrt(2 / 8) * Math.Cos(def) End If

'insert nilai koefisien DCT pada array DCT matDct(1, X, Y) = akar

Next Next End Sub

Private Sub binerLabel()

Dim m, X, Y, lst As Integer lst = 0

ListView2.Items.Clear() m = 0

For X = 1 To bmap_label.Height For Y = 1 To bmap_label.Width m = m + 1

'list.Show()

ListView2.Items.Add(m)

ListView2.Items(lst).SubItems.Add(matBin(m, 1, 1)) lst = lst + 1

Next Next End Sub

Private Sub sisipKey() Dim arrK() As String Dim arrC As Char() ReDim arrKey(8, 8) ReDim arrK(7)

(7)

arrK(i) = asc2Biner(str2ascii(i)) Next

For bar = 1 To 8 For kol = 1 To 8

arrC = arrK(bar - 1).ToCharArray arrKey(bar, kol) = arrC(kol - 1) Next

Next End Sub

Private Sub perkalianMatrik() 'sisipKey()

Dim mat, x, y As Integer ReDim matTranspose(1, 8, 8)

ReDim matTransform((bmap.Width / 8) * (bmap.Height / 8), 8, 8)

ReDim matD((bmap.Width / 8) * (bmap.Height / 8), 8, 8)

'inisialisasi nilai matrik transpose For barM = 1 To 8

For kolM = 1 To 8

matTranspose(1, kolM, barM) = matDct(1, barM, kolM) Next

For mat = 1 To (bmap.Width / 8) * (bmap.Height / 8) For barM = 1 To 8

For y = 1 To 8

matTransform(mat, x, y) = 0 For kolM = 1 To 8

matTransform(mat, x, y) = matTransform(mat, x, y) + (matDct(1, barM, kolM) * matBlue(mat, kolM, y))

Next Next x = x + 1 Next

x = 1 Next

ReDim matModif((bmap.Height / 8) * (bmap.Width / 8), 8, 8) x = 1

For y = 1 To 8

matD(mat, x, y) = 0 For kolM = 1 To 8

matD(mat, x, y) = matD(mat, x, y) + (matTransform(mat, barM, kolM) * matTranspose(1, kolM, y))

x = x + 1 Next

(8)

'cari rata2 key watermarking Dim rataKey As Integer

rataKey = 0 For i = 0 To 7

rataKey = rataKey + str2ascii(i) Next

rataKey = rataKey / 8

randomGen(rataKey)

'inisialisasi nilai tertinggi tiap baris masing2 matrik D Dim maxBar, kolH, matrix, barH As Integer

For mat = 1 To (bmap.Height / 8) * (bmap.Width / 8) For barM = 1 To 8

maxBar = 0

For kolM = 1 To 8

If barM = 1 And kolM = 1 Then matrix = 0

matD(ranDom(mat), barM, kolM) =

matD(ranDom(mat), barM, kolM) + (1 + (2 * matBin(mat, 1, 1))) Else

matrix = matD(ranDom(mat), barM, kolM) matrix = Math.Abs(matD(ranDom(mat), barM, kolM))

End If

If matrix > maxBar Then maxBar = matrix kolH = kolM barH = barM End If

End If Next

x = 1

For y = 1 To 8

matInvers(mat, x, y) = 0 For kolM = 1 To 8

matInvers(mat, x, y) = matInvers(mat, x, y) + (matTranspose(1, barM, kolM) * matD(mat, kolM, y))

x = 1 Next

(9)

For y = 1 To 8

matHasil(mat, x, y) = 0 For kolM = 1 To 8

matHasil(mat, x, y) = matHasil(mat, x, y) + (matInvers(mat, barM, kolM) * matDct(1, kolM, y))

x = 1 Next

End Sub

Private Sub citraDct()

Dim m, mTemp, bar, kol, Red, gren, blue As Integer

Dim tempbmap As New Bitmap(PictureBox3.Image) mTemp = 1

bar = 1 kol = 1 m = 1

With tempbmap

Dim X, Y As Integer sisipKey()

Red = matRed(m, bar, kol) gren = matGren(m, bar, kol)

If m = (bmap_label.Width * (bmap_label.Height / 2)) - (bmap_label.Width / 2) Then 'mencari posisi tengah citra If arrKey(bar, kol) = 0 Then

matHasil(m, bar, kol) = arrKey(bar, kol) Else

matHasil(m, bar, kol) = 255 End If

End If

blue = Int(matHasil(m, bar, kol))

If blue > 255 Then blue = 255

ElseIf blue < 0 Then blue = 0

End If

bmap.SetPixel(X, Y, Color.FromArgb(Red, gren, blue))

(10)

m = m + 1

m = mTemp Else

If (Y + 1) Mod 8 = 0 And Y <> .Height - 1 Then mTemp = mTemp + (.Width / 8)

m = mTemp Else

m = mTemp End If

Me.Text = "Proses Citra Watermarking : " & Int(100 * Y / (bmap.Height - 1)).ToString & "%"

End If Next

End With

progresBarStatus.Visible = False

Me.Text = "Proses Citra Watermarking Berhasil" bmap_dct = New Bitmap(PictureBox3.Image)

PictureBox3.Image = bmap_dct End Sub

Private Sub randomGen(ByVal nRan As Integer) Dim b, c, d, e, ar As Integer

b = (bmap.Width / 8) * (bmap.Height / 8) c = nRan

If c Mod 2 = 0 Then d = c - 4

e = d Else

d = c - 3 e = d End If

ReDim ranDom(b)

For ar = 1 To b ranDom(ar) = d

(11)

End If

If d - 2 = e Then d = 1

End If

If d = 2 Then d = b

ElseIf d Mod 2 = 0 Then d = d - 2

End If Next

End Sub

Public Sub setBaris(ByVal path As String, ByVal content As String)

Dim fileWriter As StreamWriter = File.AppendText(path) Dim i As Integer

i = 0

Try

fileWriter.WriteLine(content) fileWriter.Close()

Catch x As Exception MsgBox(x.Message) End Try

End Sub

Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged

Dim str As String Dim x As Integer

str = TextBox1.Text

Dim charArray As Char() = str.ToCharArray

ReDim str2ascii(str.Length) TextBox2.Clear()

For x = 0 To str.Length - 1

str2ascii(x) = Asc(charArray(x)) If TextBox2.Text <> "" Then

TextBox2.Text = TextBox2.Text + " " + str2ascii(x) Else

TextBox2.Text = str2ascii(x) End If

End Sub

Public Function hitungBaris(ByVal FullPath As String) Dim fileReader As StreamReader

Dim content As String = "" Dim i As Integer

(12)

Try

fileReader = New StreamReader(FullPath) Do Until (fileReader.EndOfStream)

i = i + 1

content = fileReader.ReadLine() Loop

fileReader.Close()

Return i End Function

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

OpenFileDialog1.Filter = "Images|*.JPG;*.BMP"

OpenFileDialog1.InitialDirectory = Application.StartupPath + "\Watermarking\Asli\"

OpenFileDialog1.ShowDialog()

PictureBox1.Image = Image.FromFile(OpenFileDialog1.FileName)

Dim fileCopy As String Dim num As String

num = hitungBaris(Application.StartupPath + "\Watermarking\Asli\laporan.txt") + 1

fileCopy = Application.StartupPath + "\Watermarking\Asli\citra_asli-" + num + ".jpg" If File.Exists(fileCopy) = False Then

File.Copy(OpenFileDialog1.FileName, fileCopy) End If

setBaris(Application.StartupPath +

"\Watermarking\Asli\laporan.txt", "\Watermarking\Asli\citra_asli-" + num + ".jpg")

Button7.Enabled = True End Sub

OpenFileDialog1.InitialDirectory = Application.StartupPath + "\Watermarking\Hasil\"

PictureBox2.Image = Image.FromFile(OpenFileDialog1.FileName) citraLabel()

binerLabel()

Dim fileCopy1, fileCopy2 As String Dim num As String

num = hitungBaris(Application.StartupPath + "\Watermarking\Penyisip\laporan.txt") + 1

fileCopy1 = Application.StartupPath +

"\Watermarking\Penyisip\citra_penyisip-" + num + ".jpg" fileCopy2 = Application.StartupPath +

"\Watermarking\Biner\citra_biner-" + num + ".jpg"

(13)

File.Copy(OpenFileDialog1.FileName, fileCopy1) End If

If File.Exists(fileCopy2) = False Then bmap_label.Save(fileCopy2)

End If

setBaris(Application.StartupPath + "\Watermarking\Penyisip\laporan.txt",

"\Watermarking\Penyisip\citra_penyisip-" + num + ".jpg") setBaris(Application.StartupPath +

"\Watermarking\Biner\laporan.txt", "\Watermarking\Biner\citra_biner-" + num + ".jpg")

If TextBox1.Text.Length < 8 Then

MsgBox("masukan key watermarking 8 Karater", MsgBoxStyle.Information + MsgBoxStyle.OkOnly, "Information") TextBox1.Text = ""

TextBox1.Focus() Exit Sub

End If

perkalianMatrik() citraDct()

Button8.Enabled = True

End Sub

Dim num As String

num = hitungBaris(Application.StartupPath + "\Watermarking\Hasil\laporan.txt") + 1

bmap_dct.Save(Application.StartupPath + "\Watermarking\Hasil\citra_hasil-" + num + ".jpg")

"\Watermarking\Hasil\laporan.txt", "\Watermarking\Hasil\citra_hasil-" + num + ".jpg")

MsgBox("Citra Hasil Watermarking Berhasil disimpan", MsgBoxStyle.Information + MsgBoxStyle.OkOnly, "Information") End Sub

matHasilBlue(1) Label3.Text = 1 neks.Enabled = True Button3.Enabled = True End Sub

citraHost() koeDct()

(14)

PictureBox3.Image = PictureBox1.Image End Sub

Private Sub neks_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles neks.Click

Label3.Text = Label3.Text + 1

If Label3.Text > (bmap.Height / 8) * (bmap.Width / 8) Then Label3.Text = (bmap.Height / 8) * (bmap.Width / 8) neks.Enabled = False

End If

matHasilBlue(Label3.Text)

If Label3.Text > 1 Then prev.Enabled = True End If

End Sub

Private Sub prev_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles prev.Click

Label3.Text = Label3.Text - 1 If Label3.Text = 1 Then

Label3.Text = 1 prev.Enabled = False End If

matHasilBlue(Label3.Text)

If Label3.Text < (bmap.Height / 8) * (bmap.Width / 8) Then neks.Enabled = True

End If End Sub

End Class

3. Ekstrasi (ekstraksi.vb)

Imports System.IO Imports System.Text

Public Class Ekstraksi

'dim adalah deklarasi variabel dengan [as] sebagai penugasannya. mis: as integer berarti variabel

'yang dideklarasikan adalah sebagai data integer. Dim bmap, bmap_watermark, bmap_dct As Bitmap

'variabel yang menggunakan kurung dan koma di dalamnya adalah pendeklarasian variabel array.

'mis a() -> array satu dimensi, a(,) -> array dua dimensi, dan a(,,) -> array tiga dimensi

Dim matRed(,,), matGren(,,), matBlue(,,), arrGray(,), matBin(,,), matCitraAsli(,,), matCitraWatermark(,,) As Integer

Dim matDct(,,), matTransform(,,), matTranspose(,,), matD(,,), matModif(,,), matInvers(,,), matHasil(,,) As Single

Dim matTransformW(,,), matDW(,,), matModifW(,,), matInversW(,,), matHasilW(,,) As Single

(15)

Dim ranDom() As Integer

Private Sub citraAsli()

Dim Red, gren, blue As Integer

Dim host As New Bitmap(PictureBox1.Image)

If host.Width Mod 8 <> 0 And host.Height Mod 8 <> 0 Then Dim lebar, tinggi As Integer

lebar = host.Width - (host.Width Mod 8) tinggi = host.Height - (host.Height Mod 8)

bmap = New Bitmap(PictureBox1.Image, lebar, tinggi) Else

bmap = New Bitmap(PictureBox1.Image) End If

'bmap = New Bitmap(PictureBox1.Image) PictureBox1.Image = bmap

With tempbmap

Dim X, Y As Integer

ReDim matRed((.Width / 8) * (.Height / 8), 8, 8) ReDim matGren((.Width / 8) * (.Height / 8), 8, 8) ReDim matBlue((.Width / 8) * (.Height / 8), 8, 8) ReDim matCitraAsli((.Width / 8) * (.Height / 8), 8, 8) Dim mTemp, m, bar, kol As Integer

mTemp = 1 bar = 1 kol = 1 m = 1

Red = CInt(.GetPixel(X, Y).R) gren = CInt(.GetPixel(X, Y).G) blue = CInt(.GetPixel(X, Y).B)

matCitraAsli(m, bar, kol) = blue

m = m + 1

m = mTemp Else

blue = (Red + gren + blue) / 3

(16)

m = mTemp End If

Me.Text = "Proses Citra Asli : " & Int(100 * Y / (bmap.Height - 1)).ToString & "%"

End If

Me.Text = "Proses Citra Asli Berhasil >> Input Citra Terwatermarking"

End With

progresBarStatus.Visible = False End Sub

Private Sub citraWatermarking() Dim Red, gren, blue As Integer

bmap_watermark = New Bitmap(PictureBox2.Image) PictureBox2.Image = bmap_watermark

With tempbmap

Dim X, Y As Integer

ReDim matRed((.Width / 8) * (.Height / 8), 8, 8) ReDim matGren((.Width / 8) * (.Height / 8), 8, 8) ReDim matBlue((.Width / 8) * (.Height / 8), 8, 8)

ReDim matCitraWatermark((.Width / 8) * (.Height / 8), 8, 8)

Dim mTemp, m, bar, kol As Integer

mTemp = 1 bar = 1 kol = 1 m = 1

(17)

gren = CInt(.GetPixel(X, Y).G) blue = CInt(.GetPixel(X, Y).B)

matCitraWatermark(m, bar, kol) = blue

m = m + 1

m = mTemp Else

blue = (Red + gren + blue) / 3

bmap_watermark.SetPixel(X, Y, Color.FromArgb(blue, blue, blue))

m = mTemp End If

Me.Text = "Proses Citra Watermarking : " & Int(100 * Y / (bmap.Height - 1)).ToString & "%"

End If

Me.Text = "Proses Citra Watermarking Berhasil >> Input Key Watermarking"

End With

progresBarStatus.Visible = False End Sub

Private Sub randomGen(ByVal nRan As Integer) Dim b, c, d, e, ar As Integer

b = (bmap.Width / 8) * (bmap.Height / 8) c = nRan

If c Mod 2 = 0 Then d = c - 4

e = d Else

(18)

End If

ReDim ranDom(b)

For ar = 1 To b ranDom(ar) = d

If d Mod 2 <> 0 Then d = d + 2

End If

If d - 2 = e Then d = 1

End If

If d = 2 Then d = b

ElseIf d Mod 2 = 0 Then d = d - 2

End If Next

End Sub

Private Function asc2Biner(ByVal ascii As String) Dim nAsc As Integer

nAsc = CInt(ascii)

If nAsc >= 0 And nAsc <= 255 Then Dim i, x, arrBin() As Integer ReDim arrBin(7)

x = 7

For i = 0 To 7

If nAsc > 1 Then

arrBin(x) = nAsc Mod 2 nAsc = Int(nAsc / 2) ElseIf nAsc = 1 Then arrBin(x) = nAsc nAsc = 0

Else

arrBin(x) = 0 End If

x = x - 1 Next

ascii = "" For i = 0 To 7

ascii = ascii + CStr(arrBin(i)) Next

End If

Return ascii End Function

Private Sub sisipKey() Dim arrK() As String Dim arrC As Char() ReDim arrKey(8, 8) ReDim arrK(7)

For i = 0 To 7

(19)

arrC = arrK(bar - 1).ToCharArray arrKey(bar, kol) = arrC(kol - 1) Next

Next End Sub

Private Sub koeDctAsli() 'sisipKey()

Dim X, Y As Integer Dim def, akar As Single ReDim matDct(1, 8, 8)

For X = 1 To 8 For Y = 1 To 8

If X - 1 = 0 Then

akar = 1 / Math.Sqrt(8) Else

def = (((2 * (Y - 1)) + 1) * ((X - 1) * Math.PI)) / 16

akar = Math.Sqrt(2 / 8) * Math.Cos(def) End If

matDct(1, X, Y) = akar Next

Next End Sub

Private Sub koeDctWatermarking()

Dim X, Y, lst As Integer ReDim matDct(1, 8, 8) lst = 0

ListView2.Items.Clear() ListView1.Items.Clear() For X = 1 To 8

For Y = 1 To 8 'list.Show()

ListView1.Items.Add(X & "," & Y) ListView2.Items.Add(X & "," & Y)

ListView1.Items(lst).SubItems.Add(matD(1, X, Y)) ListView1.Items(lst).SubItems.Add(matCitraAsli(1, X, Y))

ListView2.Items(lst).SubItems.Add(matDW(1, X, Y))

ListView2.Items(lst).SubItems.Add(matCitraWatermark(1, X, Y))

lst = lst + 1 Next

Next End Sub

Private Sub perkalianMatrik() Dim mat, x, y As Integer ReDim matTranspose(1, 8, 8)

(20)

ReDim matTransformW((bmap.Width / 8) * (bmap.Height / 8), 8, 8)

ReDim matD((bmap.Width / 8) * (bmap.Height / 8), 8, 8) ReDim matDW((bmap.Width / 8) * (bmap.Height / 8), 8, 8)

'inisialisasi nilai matrik transpose

'For mat = 1 To (bmap.Width / 8) * (bmap.Height / 8) For barM = 1 To 8

For kolM = 1 To 8

matTranspose(1, kolM, barM) = matDct(1, barM, kolM) Next

Next 'Next

'perkalian matrik dct dengan matrik gray x = 1

For y = 1 To 8

matTransform(mat, x, y) = 0 matTransformW(mat, x, y) = 0 For kolM = 1 To 8

matTransform(mat, x, y) = matTransform(mat, x, y) + (matDct(1, barM, kolM) * matCitraAsli(mat, kolM, y))

matTransformW(mat, x, y) = matTransformW(mat, x, y) + (matDct(1, barM, kolM) * matCitraWatermark(mat, kolM, y)) Next

Next x = x + 1 Next

x = 1 Next

x = 1

For y = 1 To 8

matD(mat, x, y) = 0 matDW(mat, x, y) = 0 For kolM = 1 To 8

matD(mat, x, y) = matD(mat, x, y) + (matTransform(mat, barM, kolM) * matTranspose(1, kolM, y)) matDW(mat, x, y) = matDW(mat, x, y) + (matTransformW(mat, barM, kolM) * matTranspose(1, kolM, y)) Next

Next x = x + 1 Next

x = 1 Next

Dim rataKey As Integer rataKey = 0

For i = 0 To 7

rataKey = rataKey + str2ascii(i) Next

rataKey = rataKey / 8

(21)

Me.Text = "Pengolahan Citra : Proses berhasil, lanjutkan ke Proses Ekstraksi"

End Sub

Private Sub citraHasil()

bmap_dct = New Bitmap(PictureBox1.Image, (bmap.Width / 8), (bmap.Height / 8))

PictureBox3.Image = bmap_dct

With bmap_dct

Dim X, Y, mat As Integer

mat = 1

For Y = 0 To .Height - 1 Application.DoEvents() For X = 0 To .Width - 1 bmap_dct.SetPixel(X, Y,

Color.FromArgb(matBin(mat, 1, 1), matBin(mat, 1, 1), matBin(mat, 1, 1)))

mat = mat + 1 Next

End With

Me.Text = "Proses Ekstraksi Berhasil" PictureBox3.Image = bmap_dct

End Sub

Private Sub getKey()

Dim x, y, m, bar, kol, mTemp As Integer ReDim keyCitra(8, 8)

mTemp = 1 m = 1 bar = 1 kol = 1

For y = 0 To bmap_watermark.Height - 1 Application.DoEvents()

For x = 0 To bmap_watermark.Width - 1 If m = (bmap_watermark.Width / 8) *

((bmap_watermark.Height / 8) / 2) - ((bmap_watermark.Width / 8) / 2) Then

If matCitraWatermark(m, bar, kol) = 0 Then keyCitra(bar, kol) = "0"

Else

keyCitra(bar, kol) = "1" End If

End If

If kol = 8 And x <> (bmap_watermark.Width - 1) Then kol = 1

m = m + 1

ElseIf kol = 8 And x = (bmap_watermark.Width - 1) Then

kol = 1 m = mTemp Else

(22)

If (y + 1) Mod 8 = 0 And y <> (bmap_watermark.Height - 1) Then

mTemp = mTemp + (bmap_watermark.Width / 8) m = mTemp

Else

m = mTemp End If

Next End Sub

Public Sub setBaris(ByVal path As String, ByVal content As String)

Dim fileWriter As StreamWriter = File.AppendText(path) Dim i As Integer

i = 0

Try

fileWriter.WriteLine(content) fileWriter.Close()

End Sub

Public Function hitungBaris(ByVal FullPath As String) Dim fileReader As StreamReader

Dim content As String = "" Dim i As Integer

i = 0

Try

fileReader = New StreamReader(FullPath) Do Until (fileReader.EndOfStream)

i = i + 1

content = fileReader.ReadLine() Loop

fileReader.Close()

Return i End Function

'=======================================================

OpenFileDialog1.InitialDirectory = Application.StartupPath + "\Watermarking\Asli\"

(23)

PictureBox1.Image = Image.FromFile(OpenFileDialog1.FileName) citraAsli()

Dim fileCopy As String

fileCopy = Application.StartupPath + "\Ekstraksi\Asli\" + OpenFileDialog1.SafeFileName

If File.Exists(fileCopy) = False Then

"\Ekstraksi\Asli\lap_citra_asli.txt", "\Ekstraksi\Asli\" + OpenFileDialog1.SafeFileName)

OpenFileDialog1.InitialDirectory = Application.StartupPath + "\Watermarking\Hasil\"

PictureBox2.Image = Image.FromFile(OpenFileDialog1.FileName) citraWatermarking()

getKey()

PictureBox3.Image = PictureBox2.Image

Dim fileCopy As String

fileCopy = Application.StartupPath + "\Ekstraksi\Watermark\" + OpenFileDialog1.SafeFileName

If File.Exists(fileCopy) = False Then

setBaris(Application.StartupPath + "\Ekstraksi\Watermark\lap_citra_watermark.txt",

"\Ekstraksi\Watermark\" + OpenFileDialog1.SafeFileName) TextBox1.Enabled = True

End Sub

koeDctAsli() perkalianMatrik()

Button4.Enabled = True

koeDctWatermarking() End Sub

Dim mat, bar, kol, rAsli, rWatermark As Integer

ReDim matBin((bmap.Width / 8) * (bmap.Height / 8), 1, 1) rAsli = 0

rWatermark = 0

(24)

rWatermark = rWatermark + matDW(ranDom(mat), bar, kol)

rAsli = rAsli + matD(ranDom(mat), bar, kol) Next

rWatermark = rWatermark / 64

If rWatermark < rAsli Then matBin(mat, 1, 1) = 0 Else

matBin(mat, 1, 1) = 255 End If

Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged

Button5.Enabled = False

GroupBox3.Text = "Your Key is not Valid"

Dim str As String Dim x As Integer

str = TextBox1.Text

Dim charArray As Char() = str.ToCharArray

ReDim str2ascii(str.Length) TextBox2.Clear()

For x = 0 To str.Length - 1

str2ascii(x) = Asc(charArray(x)) If TextBox2.Text <> "" Then

TextBox2.Text = TextBox2.Text + " " + str2ascii(x) Else

TextBox2.Text = str2ascii(x) End If

validKey = True For bar = 1 To 8 For kol = 1 To 8

If arrKey(bar, kol) <> keyCitra(bar, kol) Then validKey = False

End If Next

(25)

Me.Text = "Klik Get Matrik untuk mendapatkan nilai pixel Citra"

Else

Button5.Enabled = False

GroupBox3.Text = "Your Key is not Valid"

End If

End Sub

Dim num As String

num = hitungBaris(Application.StartupPath + "\Ekstraksi\Hasil\lap_ekstraksi.txt") + 1

bmap_dct.Save(Application.StartupPath + "\Ekstraksi\Hasil\citra_ekstraksi-" + num + ".jpg")

setBaris(Application.StartupPath + "\Ekstraksi\Hasil\lap_ekstraksi.txt",

"\Ekstraksi\Hasil\citra_ekstraksi-" + num + ".jpg")

MsgBox("Citra Hasil Ekstraksi Berhasil disimpan", MsgBoxStyle.Information + MsgBoxStyle.OkOnly, "Information") End Sub

End Class

4. About (about.vb)

Public Class About

'deklarasikan prosedur form about pada saat form diload Private Sub About_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

'deklarasi variabel i sebagai integer dan diisi dengan fungsi freeFile

Dim i As Integer = FreeFile()

'memanggil fungsi open file dengan parameter : number file, lokasi file, mode open

FileOpen(i, Application.StartupPath + "\support\about_application.txt", OpenMode.Input)

'mengisi properties text pada textbox2 dengan fungsi inputString

TextBox2.Text = InputString(i, LOF(i))

'tutup file i FileClose(i)

FileOpen(i, Application.StartupPath + "\support\about_me.txt", OpenMode.Input)

TextBox1.Text = InputString(i, LOF(i)) FileClose(i)

(26)

5. Help (help.vb)

Public Class help

Private Sub help_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

Dim i As Integer = FreeFile()

FileOpen(i, Application.StartupPath + "\support\help_watermarking.txt", OpenMode.Input) TextBox1.Text = InputString(i, LOF(i)) FileClose(i)

FileOpen(i, Application.StartupPath + "\support\help_ekstraksi.txt", OpenMode.Input) TextBox2.Text = InputString(i, LOF(i)) FileClose(i)