Imports System.Drawing
Imports System.Drawing.Imaging
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class SetThreashold
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
public class Form1
Inherits System.Windows.Forms.Form
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
Dim g As Graphics = Me.CreateGraphics()
g.Clear(Me.BackColor)
Dim lClr As Color = Color.FromArgb(245, 0, 0)
Dim uClr As Color = Color.FromArgb(255, 0, 0)
Dim ImgAttr As New ImageAttributes
ImgAttr.SetThreshold(0.7F, ColorAdjustType.Default)
Dim curImage As Image = Image.FromFile("yourfile.jpg")
g.DrawImage(curImage, 0, 0)
Dim rect As New Rectangle(0, 0, 400, 400)
g.DrawImage(curImage, rect, 0, 0, 400, 400, GraphicsUnit.Pixel, ImgAttr)
' Dispose
g.Dispose()
End Sub
Public Sub New()
MyBase.New()
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 273)
Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
End Sub
End Class
