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HighPassCommandBitmapEffect Class
See Also  Members   Example 
Leadtools.Windows.Media.Effects.Effects Namespace : HighPassCommandBitmapEffect Class





Removes low frequency details in an image, resulting in a sharpened image.

Syntax

Visual Basic (Declaration) 
Public Class HighPassCommandBitmapEffect 
   Inherits RasterCommandBitmapEffect
Visual Basic (Usage)Copy Code
Dim instance As HighPassCommandBitmapEffect
C# 
public class HighPassCommandBitmapEffect : RasterCommandBitmapEffect
C++/CLI 
public ref class HighPassCommandBitmapEffect : public RasterCommandBitmapEffect
XAML Property Element Usage 

HighPassCommandBitmapEffect ...

XAML Property Element Usage 

HighPassCommandBitmapEffect ...

Example

Run the HighPassCommandBitmapEffect on an image and apply the HighPass filter.

Visual BasicCopy Code
Public Sub HighPassCommandBitmapEffectExample(ByVal element As FrameworkElement)
   ' Initialize Effect
   Dim effect As HighPassCommandBitmapEffect = New HighPassCommandBitmapEffect()
   effect.Radius = 6
   effect.Opacity = 100
   element.BitmapEffect = effect

   ' Initialize Animations
   Dim animation1 As Int32Animation = New Int32Animation()
   animation1.From = 0
   animation1.To = 100
   animation1.By = 1
   animation1.Duration = New Duration(TimeSpan.FromSeconds(2.0))
   animation1.AutoReverse = True
   animation1.RepeatBehavior = RepeatBehavior.Forever

   ' Initialize and run Storyboard
   Dim storyboard As Storyboard = New Storyboard()
   storyboard.SetTargetName(animation1, "AnimatedBitmapEffect")
   storyboard.SetTargetProperty(animation1, New PropertyPath(HighPassCommandBitmapEffect.OpacityProperty))
   element.RegisterName("AnimatedBitmapEffect", effect)
   storyboard.Children.Add(animation1)

   storyboard.Begin(element)
End Sub
C#Copy Code
public void HighPassCommandBitmapEffectExample(FrameworkElement element) 
{ 
   // Initialize Effect 
   HighPassCommandBitmapEffect effect = new HighPassCommandBitmapEffect(); 
   effect.Radius = 6; 
   effect.Opacity = 100; 
   element.BitmapEffect = effect; 
 
   // Initialize Animations 
   Int32Animation animation1 = new Int32Animation(); 
   animation1.From = 0; 
   animation1.To = 100; 
   animation1.By = 1; 
   animation1.Duration = new Duration(TimeSpan.FromSeconds(2.0)); 
   animation1.AutoReverse = true; 
   animation1.RepeatBehavior = RepeatBehavior.Forever; 
 
   // Initialize and run Storyboard 
   Storyboard storyboard = new Storyboard(); 
   Storyboard.SetTargetName(animation1, "AnimatedBitmapEffect"); 
   Storyboard.SetTargetProperty(animation1, new PropertyPath(HighPassCommandBitmapEffect.OpacityProperty)); 
   element.RegisterName("AnimatedBitmapEffect", effect); 
   storyboard.Children.Add(animation1); 
 
   storyboard.Begin(element); 
}
XAMLCopy Code
<Page Title="CSAnimateEffect" Height="391" Width="300" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:lteffects="clr-namespace:Leadtools.Windows.Media.Effects.Effects;assembly=Leadtools.Windows.Media.Effects"> 
  <Grid> 
    <Image Margin="10,10,10,10" HorizontalAlignment="Center" VerticalAlignment="Center" Source="C:\Program Files\LEAD Technologies, Inc\LEADTOOLS 16\Images\slave.jpg"> 
      <Image.BitmapEffect> 
        <lteffects:HighPassCommandBitmapEffect x:Name="MyBitmapEffect" Radius="1" /> 
      </Image.BitmapEffect> 
      <Image.Triggers> 
        <EventTrigger RoutedEvent="Image.Loaded"> 
          <BeginStoryboard> 
            <Storyboard> 
              <Int32Animation Storyboard.TargetName="MyBitmapEffect" Storyboard.TargetProperty="Opacity" From="0" To="100" Duration="0:0:2" RepeatBehavior="Forever" AutoReverse="True" /> 
            </Storyboard> 
          </BeginStoryboard> 
        </EventTrigger> 
      </Image.Triggers> 
    </Image> 
  </Grid> 
</Page>

Remarks

  • This command removes low-frequency detail in the image. The method is opposite to that of the Gaussian Blur method
  • To increase the thickness of the edges, increase the value of radius. Usually a low value for radius is better.
  • Unlike the UnsharpMaskCommandBitmapEffect, when using this command, the low frequency features are removed from the image.
  • As an example, if you use the following image:

    And you were to call HighPassCommandBitmapEffect using the following settings:
    ParameterValue
    Radius6
    Opacity100

    The following figure results:

Inheritance Hierarchy

System.Object
   System.Windows.Threading.DispatcherObject
      System.Windows.DependencyObject
         System.Windows.Freezable
            System.Windows.Media.Animation.Animatable
               System.Windows.Media.Effects.BitmapEffect
                  Leadtools.Windows.Media.Effects.RasterCommandBitmapEffect
                     Leadtools.Windows.Media.Effects.Effects.HighPassCommandBitmapEffect

Requirements

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Vista, Windows Server 2003 family, Windows Server 2008 family

See Also