Langkah awal untuk membuat program ini yaitu :
1. Desainlah Form seperti gambar dibawah ini :
2. Kemudian ketikkan Listing program dibawah ini :
Listing Program
Public Class Form1
Dim gambar2 As Bitmap
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
PictureBox2.Image = PictureBox1.Image
End Sub
Private Sub Grayscale_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Grayscale.Click
Dim Pb, Pc As Integer
Dim Rt, vM, vH, vB As Double
gambar2 = New Bitmap(PictureBox2.Image)
For Pb = 0 To gambar2.Height - 1
For Pc = 0 To gambar2.Width - 1
vM = gambar2.GetPixel(Pc, Pb).R
vH = gambar2.GetPixel(Pc, Pb).G
vB = gambar2.GetPixel(Pc, Pb).B
Rt = (vM + vH + vB) / 3
gambar2.SetPixel(Pc, Pb, Color.FromArgb(Rt, Rt, Rt))
Next
PictureBox2.Image = gambar2
PictureBox2.Refresh()
Next
End Sub
Private Sub N_Hijau_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles N_Hijau.Click
Dim Pb, Pc As Integer
Dim Rt, vM, vH, vB As Double
gambar2 = New Bitmap(PictureBox2.Image)
For Pb = 0 To gambar2.Height - 1
For Pc = 0 To gambar2.Width - 1
vM = gambar2.GetPixel(Pc, Pb).R
vH = gambar2.GetPixel(Pc, Pb).G - 10
vB = gambar2.GetPixel(Pc, Pb).B
If vH <= 0 Then vH = 0
gambar2.SetPixel(Pc, Pb, Color.FromArgb(vM, vH, vB))
Next
PictureBox2.Image = gambar2
PictureBox2.Refresh()
Next
End Sub
Private Sub P_Hijau_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles P_Hijau.Click
Dim Pb, Pc As Integer
Dim Rt, vM, vH, vB As Double
gambar2 = New Bitmap(PictureBox2.Image)
For Pb = 0 To gambar2.Height - 1
For Pc = 0 To gambar2.Width - 1
vM = gambar2.GetPixel(Pc, Pb).R
vH = gambar2.GetPixel(Pc, Pb).G + 10
vB = gambar2.GetPixel(Pc, Pb).B
If vH >= 255 Then vH = 255
gambar2.SetPixel(Pc, Pb, Color.FromArgb(vM, vH, vB))
Next
PictureBox2.Image = gambar2
PictureBox2.Refresh()
Next
End Sub
Private Sub N_Merah_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles N_Merah.Click
Dim Pb, Pc As Integer
Dim Rt, vM, vH, vB As Double
gambar2 = New Bitmap(PictureBox2.Image)
For Pb = 0 To gambar2.Height - 1
For Pc = 0 To gambar2.Width - 1
vM = gambar2.GetPixel(Pc, Pb).R - 10
vH = gambar2.GetPixel(Pc, Pb).G
vB = gambar2.GetPixel(Pc, Pb).B
If vM <= 0 Then vM = 0
gambar2.SetPixel(Pc, Pb, Color.FromArgb(vM, vH, vB))
Next
PictureBox2.Image = gambar2
PictureBox2.Refresh()
Next
End Sub
Private Sub P_Merah_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles P_Merah.Click
Dim Pb, Pc As Integer
Dim Rt, vM, vH, vB As Double
gambar2 = New Bitmap(PictureBox2.Image)
For Pb = 0 To gambar2.Height - 1
For Pc = 0 To gambar2.Width - 1
vM = gambar2.GetPixel(Pc, Pb).R + 10
vH = gambar2.GetPixel(Pc, Pb).G
vB = gambar2.GetPixel(Pc, Pb).B
If vM >= 255 Then vM = 255
gambar2.SetPixel(Pc, Pb, Color.FromArgb(vM, vH, vB))
Next
PictureBox2.Image = gambar2
PictureBox2.Refresh()
Next
End Sub
Private Sub Rotate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Rotate.Click
Dim Pb, Pc As Integer
Dim vM, vH, vB As Double
gambar2 = New Bitmap(PictureBox1.Image)
Dim gambar3 As Bitmap = New Bitmap(PictureBox1.Image)
For Pb = gambar2.Height - 1 To 0 Step -1
For Pc = gambar2.Width - 1 To 0 Step -1
vM = gambar2.GetPixel(Pc, Pb).R
vH = gambar2.GetPixel(Pc, Pb).G
vB = gambar2.GetPixel(Pc, Pb).B
gambar3.SetPixel(gambar2.Width - 1 - Pc, gambar2.Height - 1 - Pb, Color.FromArgb(vM, vH, vB))
Next
PictureBox2.Image = gambar3
PictureBox2.Refresh()
Next
End Sub
Private Sub P_Brigness_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles P_Brigness.Click
Dim Pb, Pc As Integer
Dim Rt, vM, vH, vB As Double
gambar2 = New Bitmap(PictureBox2.Image)
For Pb = 0 To gambar2.Height - 1
For Pc = 0 To gambar2.Width - 1
vM = gambar2.GetPixel(Pc, Pb).R + 5
vH = gambar2.GetPixel(Pc, Pb).G + 5
vB = gambar2.GetPixel(Pc, Pb).B + 5
If vM >= 255 Then vM = 255
If vB >= 255 Then vB = 255
If vH >= 255 Then vH = 255
gambar2.SetPixel(Pc, Pb, Color.FromArgb(vM, vH, vB))
Next
PictureBox2.Image = gambar2
PictureBox2.Refresh()
Next
End Sub
Private Sub N_Brigness_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles N_Brigness.Click
Dim Pb, Pc As Integer
Dim Rt, vM, vH, vB As Double
gambar2 = New Bitmap(PictureBox2.Image)
For Pb = 0 To gambar2.Height - 1
For Pc = 0 To gambar2.Width - 1
vM = gambar2.GetPixel(Pc, Pb).R - 5
vH = gambar2.GetPixel(Pc, Pb).G - 5
vB = gambar2.GetPixel(Pc, Pb).B - 5
If vM <= 0 Then vM = 0
If vB <= 0 Then vB = 0
If vH <= 0 Then vH = 0
gambar2.SetPixel(Pc, Pb, Color.FromArgb(vM, vH, vB))
Next
PictureBox2.Image = gambar2
PictureBox2.Refresh()
Next
End Sub
Private Sub Negatif_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Negatif.Click
Dim Pb, Pc As Integer
Dim Rt, vM, vH, vB As Double
gambar2 = New Bitmap(PictureBox2.Image)
For Pb = 0 To gambar2.Height - 1
For Pc = 0 To gambar2.Width - 1
vM = 255 - gambar2.GetPixel(Pc, Pb).R
vH = 255 - gambar2.GetPixel(Pc, Pb).G
vB = 255 - gambar2.GetPixel(Pc, Pb).B
If vM <= 0 Then vM = 0
If vH <= 0 Then vH = 0
If vB <= 0 Then vB = 0
gambar2.SetPixel(Pc, Pb, Color.FromArgb(vM, vH, vB))
Next
PictureBox2.Image = gambar2
PictureBox2.Refresh()
Next
End Sub
End Class
3. Setelah dijalankan programnnya akan muncul seperti gambar dibawah ini :
4. Sekianlah Pemrograman Citra yang bisa saya postingkan.
silahkan dicoba dan semoga bermanfaat buat kita semua. :)
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