LEADTOOLS WPF and Silverlight (Leadtools.Windows.Media.Effects assembly)

ContrastAdjustEffect Class

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Example 





Members 
Leadtools.Windows.Media.Effects Namespace : ContrastAdjustEffect Class
Enhances the image colors by adjusting the image brightness and contrast using specified values.
Object Model
Syntax
'Declaration
 
Public Class ContrastAdjustEffect 
   Inherits System.Windows.Media.Effects.ShaderEffect
   Implements System.Windows.Media.Animation.IAnimatable 
'Usage
 
Dim instance As ContrastAdjustEffect

            

        

            

            

            

        

            
        

            

        

            
            
            
            
            
            
            
Example

    

            
            

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Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.Windows.Controls
Imports Leadtools.Windows.Media
Imports Leadtools.Windows.Media.Effects

Class ContrastAdjustEffectExampleWindow
   Inherits Window
   Public Sub New()
      Dim sp As New StackPanel()
      Content = sp
      Dim theViewer As New ImageViewer()

      theViewer.HorizontalAlignment = HorizontalAlignment.Center
      theViewer.VerticalAlignment = VerticalAlignment.Top
      theViewer.ImageHorizontalAlignment = HorizontalAlignment.Left
      theViewer.ImageVerticalAlignment = VerticalAlignment.Top

      sp.Children.Add(theViewer)

      ' Create the sliders
      Dim tb As New TextBlock()
      tb.HorizontalAlignment = HorizontalAlignment.Center
      tb.Text = "Brightness:"
      sp.Children.Add(tb)

      Dim brightnessSlider As New Slider()
      brightnessSlider.Minimum = 0.0
      brightnessSlider.Maximum = 2.0
      brightnessSlider.Width = 400
      brightnessSlider.Orientation = Orientation.Horizontal
      brightnessSlider.IsSnapToTickEnabled = True
      brightnessSlider.TickPlacement = System.Windows.Controls.Primitives.TickPlacement.BottomRight
      brightnessSlider.TickFrequency = 0.1
      brightnessSlider.AutoToolTipPrecision = 2
      brightnessSlider.AutoToolTipPlacement = System.Windows.Controls.Primitives.AutoToolTipPlacement.BottomRight

      sp.Children.Add(brightnessSlider)

      tb = New TextBlock()
      tb.HorizontalAlignment = HorizontalAlignment.Center
      tb.Text = "Contrast:"
      sp.Children.Add(tb)

      Dim contrastSlider As New Slider()
      contrastSlider.Minimum = 0.0
      contrastSlider.Maximum = 2.0
      contrastSlider.Width = 400
      contrastSlider.Orientation = Orientation.Horizontal
      contrastSlider.IsSnapToTickEnabled = True
      contrastSlider.TickPlacement = System.Windows.Controls.Primitives.TickPlacement.BottomRight
      contrastSlider.TickFrequency = 0.1
      contrastSlider.AutoToolTipPrecision = 2
      contrastSlider.AutoToolTipPlacement = System.Windows.Controls.Primitives.AutoToolTipPlacement.BottomRight

      sp.Children.Add(contrastSlider)

      ' Load an image into the viewer
      theViewer.Source = New BitmapImage(New Uri(System.IO.Path.Combine(LEAD_VARS.ImagesDir, "Cannon.jpg")))

      ' Create the effect
      Dim effect As New ContrastAdjustEffect()
      effect.Brightness = 0.0
      effect.Contrast = 1.2
      theViewer.ImageEffect = effect

      ' Bind the properties
      Dim bind As New Binding()
      bind.Source = effect
      bind.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
      bind.Path = New PropertyPath("Brightness")
      brightnessSlider.SetBinding(Slider.ValueProperty, bind)

      bind = New Binding()
      bind.Source = effect
      bind.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
      bind.Path = New PropertyPath("Contrast")
      contrastSlider.SetBinding(Slider.ValueProperty, bind)

      Title = "Using ContrastAdjustEffect"
   End Sub
End Class

Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

            

   

     

            
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.Windows.Controls;
using Leadtools.Windows.Media;
using Leadtools.Windows.Media.Effects;

class ContrastAdjustEffectExampleWindow : Window
{
   public ContrastAdjustEffectExampleWindow()
   {
      StackPanel sp = new StackPanel();
      Content = sp;
      ImageViewer theViewer = new ImageViewer();

      theViewer.HorizontalAlignment = HorizontalAlignment.Center;
      theViewer.VerticalAlignment = VerticalAlignment.Top;
      theViewer.ImageHorizontalAlignment = HorizontalAlignment.Left;
      theViewer.ImageVerticalAlignment = VerticalAlignment.Top;

      sp.Children.Add(theViewer);

      // Create the sliders
      TextBlock tb = new TextBlock();
      tb.HorizontalAlignment = HorizontalAlignment.Center;
      tb.Text = "Brightness:";
      sp.Children.Add(tb);

      Slider brightnessSlider = new Slider();
      brightnessSlider.Minimum = 0.0;
      brightnessSlider.Maximum = 2.0;
      brightnessSlider.Width = 400;
      brightnessSlider.Orientation = Orientation.Horizontal;
      brightnessSlider.IsSnapToTickEnabled = true;
      brightnessSlider.TickPlacement = System.Windows.Controls.Primitives.TickPlacement.BottomRight;
      brightnessSlider.TickFrequency = 0.1;
      brightnessSlider.AutoToolTipPrecision = 2;
      brightnessSlider.AutoToolTipPlacement = System.Windows.Controls.Primitives.AutoToolTipPlacement.BottomRight;

      sp.Children.Add(brightnessSlider);

      tb = new TextBlock();
      tb.HorizontalAlignment = HorizontalAlignment.Center;
      tb.Text = "Contrast:";
      sp.Children.Add(tb);

      Slider contrastSlider = new Slider();
      contrastSlider.Minimum = 0.0;
      contrastSlider.Maximum = 2.0;
      contrastSlider.Width = 400;
      contrastSlider.Orientation = Orientation.Horizontal;
      contrastSlider.IsSnapToTickEnabled = true;
      contrastSlider.TickPlacement = System.Windows.Controls.Primitives.TickPlacement.BottomRight;
      contrastSlider.TickFrequency = 0.1;
      contrastSlider.AutoToolTipPrecision = 2;
      contrastSlider.AutoToolTipPlacement = System.Windows.Controls.Primitives.AutoToolTipPlacement.BottomRight;

      sp.Children.Add(contrastSlider);

      // Load an image into the viewer
      theViewer.Source = new BitmapImage(new Uri(System.IO.Path.Combine(LEAD_VARS.ImagesDir, "Cannon.jpg")));

      // Create the effect
      ContrastAdjustEffect effect = new ContrastAdjustEffect();
      effect.Brightness = 0.0;
      effect.Contrast = 1.2;
      theViewer.ImageEffect = effect;

      // Bind the properties
      Binding bind = new Binding();
      bind.Source = effect;
      bind.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
      bind.Path = new PropertyPath("Brightness");
      brightnessSlider.SetBinding(Slider.ValueProperty, bind);

      bind = new Binding();
      bind.Source = effect;
      bind.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
      bind.Path = new PropertyPath("Contrast");
      contrastSlider.SetBinding(Slider.ValueProperty, bind);

      Title = "Using ContrastAdjustEffect";
   }
}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

            

   

     

            
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.Windows.Media;
using Leadtools.Windows.Media.Effects;
using Leadtools.Windows.Controls;

class ContrastAdjustEffectExampleWindow : UserControl
{
   public ContrastAdjustEffectExampleWindow()
   {
      StackPanel sp = new StackPanel();
      Content = sp;
      ImageViewer theViewer = new ImageViewer();

      theViewer.HorizontalAlignment = HorizontalAlignment.Center;
      theViewer.VerticalAlignment = VerticalAlignment.Top;
      theViewer.ImageHorizontalAlignment = HorizontalAlignment.Left;
      theViewer.ImageVerticalAlignment = VerticalAlignment.Top;

      sp.Children.Add(theViewer);

      // Create the sliders
      TextBlock tb = new TextBlock();
      tb.HorizontalAlignment = HorizontalAlignment.Center;
      tb.Text = "Brightness:";
      sp.Children.Add(tb);

      Slider brightnessSlider = new Slider();
      brightnessSlider.Minimum = 0.0;
      brightnessSlider.Maximum = 2.0;
      brightnessSlider.Width = 400;
      brightnessSlider.Orientation = Orientation.Horizontal;

      sp.Children.Add(brightnessSlider);

      tb = new TextBlock();
      tb.HorizontalAlignment = HorizontalAlignment.Center;
      tb.Text = "Contrast:";
      sp.Children.Add(tb);

      Slider contrastSlider = new Slider();
      contrastSlider.Minimum = 0.0;
      contrastSlider.Maximum = 2.0;
      contrastSlider.Width = 400;
      contrastSlider.Orientation = Orientation.Horizontal;

      sp.Children.Add(contrastSlider);

      // Load an image into the viewer
      theViewer.Source = new BitmapImage(new Uri(LeadtoolsExamples.Common.ImagesPath.Path + "Cannon.jpg"));

      // Create the effect
      ContrastAdjustEffect effect = new ContrastAdjustEffect();
      effect.Brightness = 0.0;
      effect.Contrast = 1.2;
      theViewer.ImageEffect = effect;

      // Bind the properties
      Binding bind = new Binding();
      bind.Source = effect;
      bind.UpdateSourceTrigger = UpdateSourceTrigger.Default;
      bind.Path = new PropertyPath("Brightness");
      brightnessSlider.SetBinding(Slider.ValueProperty, bind);

      bind = new Binding();
      bind.Source = effect;
      bind.UpdateSourceTrigger = UpdateSourceTrigger.Default;
      bind.Path = new PropertyPath("Contrast");
      contrastSlider.SetBinding(Slider.ValueProperty, bind);
   }
}

            

   

     

            
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.Windows.Controls
Imports Leadtools.Windows.Media
Imports Leadtools.Windows.Media.Effects

Class ContrastAdjustEffectExampleWindow
   Inherits UserControl
   Public Sub New()
      Dim sp As New StackPanel()
      Content = sp
      Dim theViewer As New ImageViewer()

      theViewer.HorizontalAlignment = HorizontalAlignment.Center
      theViewer.VerticalAlignment = VerticalAlignment.Top
      theViewer.ImageHorizontalAlignment = HorizontalAlignment.Left
      theViewer.ImageVerticalAlignment = VerticalAlignment.Top

      sp.Children.Add(theViewer)

      ' Create the sliders
      Dim tb As New TextBlock()
      tb.HorizontalAlignment = HorizontalAlignment.Center
      tb.Text = "Brightness:"
      sp.Children.Add(tb)

      Dim brightnessSlider As New Slider()
      brightnessSlider.Minimum = 0.0
      brightnessSlider.Maximum = 2.0
      brightnessSlider.Width = 400
      brightnessSlider.Orientation = Orientation.Horizontal

      sp.Children.Add(brightnessSlider)

      tb = New TextBlock()
      tb.HorizontalAlignment = HorizontalAlignment.Center
      tb.Text = "Contrast:"
      sp.Children.Add(tb)

      Dim contrastSlider As New Slider()
      contrastSlider.Minimum = 0.0
      contrastSlider.Maximum = 2.0
      contrastSlider.Width = 400
      contrastSlider.Orientation = Orientation.Horizontal

      sp.Children.Add(contrastSlider)

      ' Load an image into the viewer
      theViewer.Source = New BitmapImage(New Uri(LeadtoolsExamples.Common.ImagesPath.Path + "Cannon.jpg"))

      ' Create the effect
      Dim effect As New ContrastAdjustEffect()
      effect.Brightness = 0.0
      effect.Contrast = 1.2
      theViewer.ImageEffect = effect

      ' Bind the properties
      Dim bind As New Binding()
      bind.Source = effect
      bind.UpdateSourceTrigger = UpdateSourceTrigger.Default
      bind.Path = New PropertyPath("Brightness")
      brightnessSlider.SetBinding(Slider.ValueProperty, bind)

      bind = New Binding()
      bind.Source = effect
      bind.UpdateSourceTrigger = UpdateSourceTrigger.Default
      bind.Path = New PropertyPath("Contrast")
      contrastSlider.SetBinding(Slider.ValueProperty, bind)
   End Sub
End Class

            

   

     

            
<Window x:Class="ContrastAdjustEffectExample"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:leadControls="clr-namespace:Leadtools.Windows.Controls;assembly=Leadtools.Windows.Controls"
xmlns:leadEffects="clr-namespace:Leadtools.Windows.Media.Effects;assembly=Leadtools.Windows.Media.Effects"
Height="600" Width="800">
   <StackPanel>
      <leadControls:ImageViewer
            HorizontalAlignment="Center" VerticalAlignment="Top"
            ImageHorizontalAlignment="Left" ImageVerticalAlignment="Top"
            Source="file:///c:\users\Public\Documents\LEADTOOLS Images\cannon.jpg">
         <leadControls:ImageViewer.ImageEffect>
            <leadEffects:ContrastAdjustEffect
               Brightness="{Binding Value, ElementName=BrightnessSlider, UpdateSourceTrigger=PropertyChanged}"
               Contrast="{Binding Value, ElementName=ContrastSlider, UpdateSourceTrigger=PropertyChanged}">
            </leadEffects:ContrastAdjustEffect>
         </leadControls:ImageViewer.ImageEffect>
      </leadControls:ImageViewer>
      <TextBlock HorizontalAlignment="Center" Text="Brightness:"/>
      <Slider x:Name="BrightnessSlider"
            Minimum="0.0" Maximum="2.0" TickFrequency="0.1"
            Width="400" Orientation="Horizontal"
            IsSnapToTickEnabled="True" TickPlacement="BottomRight"
            AutoToolTipPrecision="2" AutoToolTipPlacement="BottomRight">
      </Slider>
      <TextBlock HorizontalAlignment="Center" Text="Contrast:"/>
      <Slider x:Name="ContrastSlider"
            Minimum="0.0" Maximum="2.0" TickFrequency="0.1"
            Width="400" Orientation="Horizontal"
            IsSnapToTickEnabled="True" TickPlacement="BottomRight"
            AutoToolTipPrecision="2" AutoToolTipPlacement="BottomRight">
      </Slider>
   </StackPanel>
</Window>

            

   

      
	
      
	
    

            
           
            
Requirements
Target Platforms

            
            
See Also
Reference
ContrastAdjustEffect Members

Leadtools.Windows.Media.Effects Namespace

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