LAMPIRAN A: LISTING PROGRAM Form Menu Utama

  LAMPIRAN A

  LAMPIRAN A: LISTING PROGRAM Form Menu Utama

  Public Class MenuUtama Private Sub

  

AlgoritmaKompresiToolStripMenuItem_Click_1( ByVal sender

  As System.Object, ByVal e As System.EventArgs) Handles

  AlgoritmaKompresiToolStripMenuItem.Click jenis.ShowDialog()

  End Sub Private Sub KeluarToolStripMenuItem_Click( ByVal

  sender As System.Object, ByVal e As System.EventArgs)

  Handles KeluarToolStripMenuItem.Click End

  End Sub End Class

  Form Menu Jenis

  Public Class jenis Private Sub Button2_Click( ByVal sender As

  System.Object, ByVal e As System.EventArgs) Handles Button2.Click

  Dim KAC As New kompresAC

  KAC.ShowDialog()

  End Sub Private Sub btnkompres_Click( ByVal sender As

  System.Object, ByVal e As System.EventArgs) Handles btnkompres.Click

  Dim KSF As New kompresiSF

  KSF.ShowDialog()

  End Sub Private Sub Button1_Click( ByVal sender As

  System.Object, ByVal e As System.EventArgs) Handles Button1.Click

  Dim DAC As New DekompresAC

  DAC.ShowDialog()

  End Sub

  Private Sub btnDkompres_Click( ByVal sender As

  System.Object, ByVal e As System.EventArgs) Handles btnDkompres.Click

  Dim DSF As New DekompresiSF

  DSF.ShowDialog()

  End Sub End Class

  Form Kompresi Arithmetic Coding

  Imports System.IO Public Class frmKompresiAC

  Structure _warna Dim index As Integer Dim frek As Integer Dim high_range As Double Dim low_range As Double

  End Structure Structure _high_low

  Dim high As Double Dim low As Double

  End Structure Private hilow As _high_low Private temp(255) As _warna Private warna(0) As _warna Private totFrek As Decimal = 0 Private img As Bitmap Private low As Decimal = 0 Private high As Decimal = 1 Private CR = 0 Private w As Decimal = 0 Private h As Decimal = 0 Private Function getHighLow( ByVal nilai As Integer )

  As _high_low For i As Integer = 0 To warna.GetUpperBound(0)

  If warna(i).index = nilai Then

  getHighLow.high = warna(i).high_range getHighLow.low = warna(i).low_range

  Return getHighLow End If

  Next End Function Private Function getLow() As Double End Function Private Sub hitungAC( ByVal nilai As Integer )

  CR = high - low hilow = getHighLow(nilai) high = low + (CR * hilow.high) low = low + (CR * hilow.low)

  End Sub Private Sub set_warna() Private Sub initialize()

  Call set_warna()

  ofd.Multiselect = False ofd.Filter = "bitmap file|*.bmp" ofd.FileName = Nothing sfd.Filter = "Arithmetic-Files|*.ac" btnKprs.Enabled = True

  End Sub Private Sub register_warna()

  For y As Integer = 0 To img.Height - 1 For x As Integer = 0 To img.Width - 1

  temp(img.GetPixel(x, y).R).frek += 1 temp(img.GetPixel(x, y).G).frek += 1 temp(img.GetPixel(x, y).B).frek += 1

  Next ReDim Preserve warna(warna.GetUpperBound(0) - 1) For i As Integer = 0 To warna.GetUpperBound(0)

  If i = 0 Then

  warna(i).low_range = 0 warna(i).high_range = warna(i).frek / totFrek

  ElseIf i = warna.GetUpperBound(0) Then

  warna(i).low_range = warna(i - 1).high_range warna(i).high_range = 1

  Else

  warna(i).low_range = warna(i - 1).high_range

warna(i).high_range = warna(i).low_range

• (warna(i).frek / totFrek)

  End If Next

  End Sub

  Private Sub btnOpen_Click( ByVal sender As

  Call hitungAC(img.GetPixel(x, y).G) Call hitungAC(img.GetPixel(x, y).B)

  Dim sw As New StreamWriter(lblFile.Text, False )

  End Sub Private Sub saveFile()

  MyBase .Load Call initialize()

  System.Object, ByVal e As System.EventArgs) Handles

  End Sub Private Sub frmKompresiAC_Load( ByVal sender As

  Next Next Call saveFile()

  For y As Integer = 0 To img.Height - 1 For x As Integer = 0 To img.Width - 1

  System.Object, ByVal e As System.EventArgs) Handles btnOpen.Click

  w = img.Width - 1 h = img.Height - 1

  Next For i As Integer = 0 To warna.GetUpperBound(0) Next

  Call register_warna() For i As Integer = 0 To 255

  System.Object, ByVal e As System.EventArgs) Handles btnKprs.Click

  End If End Sub Private Sub btnKprs_Click( ByVal sender As

  img = New Bitmap(ofd.FileName) pbFoto.BackgroundImage = img

  If ofd.ShowDialog = Windows.Forms.DialogResult.OK Then

  sw.WriteLine(low) sw.WriteLine(w) sw.WriteLine(h) sw.WriteLine(warna(i).index) sw.WriteLine(warna(i).low_range) sw.WriteLine(warna(i).high_range)

  Next

  sw.Close()

MessageBox.Show( "Data Berhasil Disimpan" )

  End Sub End Class

  Form Dekompresi Arithmetic Coding

  Imports System.IO Public Class frmDkompresiAC

  Private file As String Private acffile As String Private low As Decimal = 0 Private high As Decimal = 0 Private cr As Decimal = 0 Private es As Decimal = 0 Private state As String = "R" Structure _img

  Dim r As Integer Dim g As Integer Dim b As Integer

  End Structure Structure _warna

  Dim index As Integer Dim frek As Integer Dim high_range As Double Dim low_range As Double

  End Structure Structure _high_low

  Dim high As Double Dim low As Double

  End Structure Private img(0, 0) As _img Private hilow As _high_low Private warna(0) As _warna Private w As Integer = 0 Private h As Integer = 0

  Private Sub readData() Dim index As Integer = 0 Dim sr = New StreamReader(file)

  low = sr.ReadLine w = sr.ReadLine h = sr.ReadLine

  While Not sr.EndOfStream

  warna(index).index = sr.ReadLine warna(index).low_range = sr.ReadLine warna(index).high_range = sr.ReadLine index += 1

  ReDim Preserve warna(index) End While

  index -= 1

  ReDim Preserve warna(index)

  sr.Close()

  End Sub Private Function Dkompresi( ByVal nilai As Decimal ) As

  Decimal

  Dkompresi = nilai hilow = getHighLow(nilai) cr = hilow.high - hilow.low Dkompresi = Dkompresi / cr

  Return Dkompresi End Function Private Function getNilai( ByVal nilai As Decimal ) As

  Integer For i As Integer = 0 To warna.GetUpperBound(0)

  If nilai >= warna(i).low_range And nilai <=

  warna(i).high_range Then

  Return warna(i).index End If

  Next Return Nothing

  End Function Private Function getHighLow( ByVal nilai As Decimal )

  As _high_low For i As Integer = 0 To warna.GetUpperBound(0)

  If nilai >= warna(i).low_range And nilai <=

  warna(i).high_range Then getHighLow.high = warna(i).high_range getHighLow.low = warna(i).low_range

  Return getHighLow End If

  Next End Function Private Sub inisialize()

  Call readData()

  es = low

  ReDim img(w, h) End Sub Private Sub Initialize()

  acfFile = lblFile.Text OFD.Multiselect = False ofd.Filter = "Arithmetic-Files|*.ac" OFD.FileName = Nothing sfd.Filter = "bitmap file|*.bmp" btnDkprs.Enabled = True

  End Sub

  System.Object, ByVal e As System.EventArgs) Handles btnFile.Click

  If ofd.ShowDialog = Windows.Forms.DialogResult.OK Then

  file = ofd.FileName

  End If End Sub Private Sub btnDkprs_Click( ByVal sender As

  System.Object, ByVal e As System.EventArgs) Handles btnDkprs.Click

  Dim x As Integer = 0 Dim y As Integer = 0 Dim r, g, b As Integer Call inisialize() Call saveFile() Dim gbr As New Bitmap(w + 1, h + 1) Do Until y > h

  Select Case state Case "R"

  r = getNilai(es) state = "G"

  Case "G"

  g = getNilai(es) state = "B"

  Case "B"

  b = getNilai(es) state = "R"

gbr.SetPixel(x, y, Color.FromArgb(r,

  g, b)) x += 1

  End Select If x > w Then

  x = 0 y += 1

  End If Loop

  ListBox1.Items.Add(es) pbFoto.BackgroundImage = gbr

  End Sub Private Sub frmDkompresiAC_Load( ByVal sender As

  MyBase .Load Call Initialize()

  End Sub Private Sub btnFile1_Click( ByVal sender As

  System.Object, ByVal e As System.EventArgs) Handles btnFile1.Click

  If sfd.ShowDialog = Windows.Forms.DialogResult.OK Then

  lblFile.Text = sfd.FileName btnDkprs.Enabled = True

  End If End Sub

  End Class

  Form Kompresi Shannon-Fano

  Imports System.IO Public Class frmKompresiSF #Region "Variabel"

  Private warnaawal(255) As color Private warnaurut(255) As color Private w, h As Integer Private JlhSmpl As Integer = 255 Private img As Bitmap Private sf() As shannonfano Private sftemp() As shannonfano Private selisih() As Long Private imgBinary As String = "" Private imgDesimal As String = "" Private imgHexa As String = "" Structure shannonfano

  Dim sampel As Integer Dim start As Integer

  End Structure Structure color

  Dim nilai As Byte Dim frek As Integer Dim cabang As String Dim hexa As String

  End Structure #End Region #Region "Langkah 1"

  Private Sub Initialize()

  OFD.Multiselect = False OFD.Filter = "bitmap file|*.bmp" OFD.FileName = Nothing sFd.Filter = "Shannon-Fano-Files|*.sf" btnKprs.Enabled = True

  End Sub Private Sub Form1_Load( ByVal sender As System.Object,

  ByVal e As System.EventArgs) Handles MyBase .Load Call Initialize()

  End Sub Private Sub btnOpen_Click( ByVal sender As

  System.Object, ByVal e As System.EventArgs) Handles btnOpen.Click

  If OFD.ShowDialog = Windows.Forms.DialogResult.OK Then pbFoto.Image = img

  End If End Sub Private Sub btnFile_Click( ByVal sender As

  System.Object, ByVal e As System.EventArgs) Handles btnFile.Click

  If sFd.ShowDialog = Windows.Forms.DialogResult.OK Then

  lblFile.Text = sFd.FileName btnKprs.Enabled = True

  End If End Sub Private Sub btnKprs_Click( ByVal sender As

  System.Object, ByVal e As System.EventArgs) Handles btnKprs.Click

  Call hitungPL() Call RegisterWarna() Call gambartobiner() Call bin_to_hex(imgBinary) Call saveFile()

  End Sub Private Sub hitungPL()

  w = img.Width h = img.Height

  End Sub #End Region #Region "Langkah 2"

  Private Sub resetsample() For p As Integer = 0 To 255

  warnaawal(p).nilai = p warnaawal(p).frek = 0 warnaawal(p).cabang = Nothing

  Next End Sub Private Sub RegisterWarna()

  Call resetsample() Call sortsample() Call HitungJlhsmpl() Call registersf() Call ceksf()

  End Sub #End Region

  Private Sub sortsample() Dim awal As Integer = 0 Dim akhir As Integer = 255 Dim nilai As Integer = 0 Dim frek As Long = 0 Dim pos As Integer = 0 Dim temp As color Do Until awal = akhir

  pos = awal nilai = warnaawal(awal).nilai frek = warnaawal(awal).frek

  For i As Integer = awal To akhir If warnaawal(i).frek > frek Then

  pos = i nilai = warnaawal(pos).nilai frek = warnaawal(pos).frek

  End If Next

  temp.nilai = nilai temp.frek = frek

warnaawal(pos).nilai = warnaawal(awal).nilai

warnaawal(pos).frek = warnaawal(awal).frek warnaawal(awal).nilai = temp.nilai warnaawal(awal).frek = temp.frek awal += 1

  Loop End Sub

  #End Region #Region "Langkah 4"

  Private Sub HitungJlhsmpl() For i As Integer = 0 To 255

  If warnaawal(i).frek = 0 Then

  JlhSmpl = i - 1

  Exit For End If

  Next

  lblSampel.Text = JlhSmpl + 1

  End Sub #End Region #Region "Langkah 5"

  Private Sub registersf() ReDim Preserve sf(0)

  sf(0).sampel = JlhSmpl + 1 sf(0).start = 0

  Dim pos As Integer = 0

  Next For j As Integer = start + i + 1 To akhir Next

  End Function Private Sub ceksf()

  Next Return hitungselisih + start

  Exit For End If

  hitungselisih = i

  ElseIf selisih(i - 1) > selisih(i) Then

  hitungselisih = i

  If selisih(i - 1) = selisih(i) Then

  1 Step -1

  Next For i As Integer = selisih.GetUpperBound(0) To

  

selisih(i) = Math.Abs(nilaiatas - nilaibawah)

  nilaiatas += warnaawal(j).frek

  End Sub #End Region #Region "Langkah 6"

  For j As Integer = start To start + i

  nilaiatas = 0 nilaibawah = 0

  Dim nilaiatas As Long Dim nilaibawah As Long Dim akhir As Integer = start + jumlah - 1 ReDim selisih(jumlah - 2) For i As Integer = 0 To jumlah - 2

  hitungselisih = 0

  Integer , ByVal start As Integer ) As Integer

  Next End Sub Private Function hitungselisih( ByVal jumlah As

  warnaawal(i).cabang &= nilai

  For i As Integer = start To start + jumlah - 1

  jumlah As Integer , ByVal nilai As Byte )

  Private Sub nilaicabang( ByVal start As Integer , ByVal

• start

  Dim maxnow As Integer = 0 Do Until sf.GetUpperBound(0) = JlhSmpl 'jika

  prog.Value = pos maxnow = pos

  For x = 1 To

  dec = 0 awal = (klmpk * 4) + 1 temps = New String (Mid(bin, awal, 4)) bins = ""

  Dim dec As Integer = 0 Dim str As String = "" Dim strb, strd, strh As String Dim length As Integer = Len(bin) Dim temp As Integer = Nothing Dim bins As String Dim temps As String = "" Dim awal As Integer = 0 Dim x As Integer = Nothing Dim ch As Integer = length / 4 Dim sisa As Integer = length - (ch * 4) For klmpk As Integer = 0 To ch - 1

  Public Function bin_to_hex( ByVal bin As String ) As String

  End Sub #Region "Langkah 8"

  prog.Value = maxnow lblP.Text = maxnow

  End If Loop

  Exit Do End If If pos > maxnow Then

  

jumlah sample sama dengan jumlah kelompok sf berarti

sudah selesai

  End If If pos > sf.GetUpperBound(0) Then

  pos += 1

  End If If Not ulang Then

  ulang = False

  Else

  pos = 0 ulang = True

  If sf(pos).sampel > 1 Then Call pecahsf(pos)

  4 If temp <> "0" Then

  dec += (2 ^ (4 - x))

  End If

  bins &= temp

  Next

  imgHexa &= Hex(dec)

  Next

  dec = 0 bins = ""

  For x = 1 To sisa

  awal = (ch * 4) + 1 temps = New String (Mid( String .Concat(bin, "0000" ), awal, 4)) temp = Val(Mid(temps, x, 1))

  If temp <> "0" Then

  dec += (2 ^ (4 - x))

  End If

  bins &= temp

  Next

  imgHexa &= Hex(dec)

  Return str End Function

  #End Region Private Sub saveFile()

  Dim sw As New StreamWriter(lblFile.Text, False )

  sw.WriteLine(w) sw.WriteLine(h)

  For i As Integer = 0 To JlhSmpl

  sw.WriteLine(warnaawal(i).nilai) sw.WriteLine(warnaawal(i).cabang)

  Next

  sw.Close() MessageBox.Show( "Data Berhasil Disimpan" )

  End Sub End Class

  Form Dekompresi Shannon-Fano

  Imports System.IO Public Class frmDkompresiSF

  Structure warna_ Dim R As Integer

  Dim G As Integer Dim B As Integer

  Dim sr As New StreamReader(sfFile)

  rtbHexa.Text = imgHexa

  End While

  sf(jlhSmpl - 1).warna = sr.ReadLine sf(jlhSmpl - 1).cabang = sr.ReadLine rtbTabel.Text &= sf(jlhSmpl - 1).warna & vbCrLf & sf(jlhSmpl - 1).cabang & vbCrLf

  ReDim Preserve sf(jlhSmpl - 1)

  jlhSmpl += 1

  ReDim img(w, h) While Not sr.EndOfStream

  imgHexa = sr.ReadLine w = sr.ReadLine h = sr.ReadLine

  End Function Private Sub readData()

  End Structure Structure tabelSF

  Next Return Nothing

  Return hasil End If

  hasil = sf(i).warna status = True

  If bin = sf(i).cabang Then

  Dim hasil As Integer Dim ketemu As Boolean = False For i As Integer = 0 To jlhSmpl - 1

  

status As Boolean , ByRef status2 As Boolean ) As Integer

  End Structure Private w, h As Integer Private imgHexa As String Private imgBiner As String Private sfFile As String Private img(1, 1) As warna_ Private sf() As tabelSF Private jlhSmpl As Integer = 0 Private Function binertosf( ByVal bin As String , ByRef

  Dim warna As Integer Dim cabang As String

  End Sub

  Private Sub Initialize()

  sfFile = lblFile.Text OFD.Multiselect = False OFD.Filter = "Shannon-Fano-Files|*.sf" OFD.FileName = Nothing SFD.Filter = "bitmap file|*.bmp" btnDkprs.Enabled = True

  End Sub Private Sub frmDkompresi_Load( ByVal sender As

  System.Object, ByVal e As System.EventArgs) Handles

  MyBase .Load Call Initialize()

  End Sub Private Sub btnOpen_Click( ByVal sender As

  System.Object, ByVal e As System.EventArgs) Handles btnOpen.Click

  If OFD.ShowDialog = Windows.Forms.DialogResult.OK Then

  lblFile.Text = OFD.FileName sfFile = lblFile.Text

  Call readData() End If

  End Sub Private Sub saveFile()

  MessageBox.Show( "Data Berhasil Disimpan" )

  End Sub Private Sub btnFile_Click( ByVal sender As

  System.Object, ByVal e As System.EventArgs) Handles btnFile.Click

  If SFD.ShowDialog = Windows.Forms.DialogResult.OK Then

  lblFile.Text = SFD.FileName btnDkprs.Enabled = True

  End If End Sub

  End Class