本文整理匯總了VB.NET中System.Drawing.Imaging.ImageAttributes.SetThreshold方法的典型用法代碼示例。如果您正苦於以下問題：VB.NET ImageAttributes.SetThreshold方法的具體用法？VB.NET ImageAttributes.SetThreshold怎麽用？VB.NET ImageAttributes.SetThreshold使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Drawing.Imaging.ImageAttributes的用法示例。
在下文中一共展示了ImageAttributes.SetThreshold方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: SetThresholdExample
Public Sub SetThresholdExample(ByVal e As PaintEventArgs)
' Open an Image file, and draw it to the screen.
Dim myImage As Image = Image.FromFile("Camera.jpg")
e.Graphics.DrawImage(myImage, 20, 20)
' Create an ImageAttributes object, and set its color threshold.
Dim imageAttr As New ImageAttributes
imageAttr.SetThreshold(0.7F)
' Draw the image with the colors bifurcated.
Dim rect As New Rectangle(300, 20, 200, 200)
e.Graphics.DrawImage(myImage, rect, 0, 0, 200, 200, _
GraphicsUnit.Pixel, imageAttr)
End Sub示例2: SetThreashold
' 導入命名空間
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