Run the GammaCorrectCommandBitmapEffect on an image and apply gamma correction.

Visual Basic

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Public Sub GammaCorrectCommandBitmapEffectExample(ByVal element As FrameworkElement)    ' Initialize Effect    Dim effect As GammaCorrectCommandBitmapEffect = New GammaCorrectCommandBitmapEffect()    effect.Gamma = 250    element.BitmapEffect = effect    ' Initialize Animations    Dim animation1 As Int32Animation = New Int32Animation()    animation1.From = 1    animation1.To = 1000    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(GammaCorrectCommandBitmapEffect.GammaProperty))    element.RegisterName("AnimatedBitmapEffect", effect)    storyboard.Children.Add(animation1)    storyboard.Begin(element) End Sub

C#

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public void GammaCorrectCommandBitmapEffectExample(FrameworkElement element)  {       // Initialize Effect     GammaCorrectCommandBitmapEffect effect = new GammaCorrectCommandBitmapEffect();     effect.Gamma = 250;     element.BitmapEffect = effect;       // Initialize Animations     Int32Animation animation1 = new Int32Animation();     animation1.From = 1;     animation1.To = 1000;     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(GammaCorrectCommandBitmapEffect.GammaProperty));     element.RegisterName("AnimatedBitmapEffect", effect);     storyboard.Children.Add(animation1);       storyboard.Begin(element);  }

XAML

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<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.Color;assembly=Leadtools.Windows.Media.Effects">    <Grid>      <Image Margin="10,10,10,10" HorizontalAlignment="Center" VerticalAlignment="Center" Source="C:\Program Files\LEAD Technologies, Inc\LEADTOOLS 15\Images\slave.jpg">        <Image.BitmapEffect>          <lteffects:GammaCorrectCommandBitmapEffect x:Name="MyBitmapEffect" Gamma="1" />        </Image.BitmapEffect>        <Image.Triggers>          <EventTrigger RoutedEvent="Image.Loaded">            <BeginStoryboard>              <Storyboard>                <Int32Animation Storyboard.TargetName="MyBitmapEffect" Storyboard.TargetProperty="Gamma" From="1" To="1000" Duration="0:0:2" RepeatBehavior="Forever" AutoReverse="True" />              </Storyboard>            </BeginStoryboard>          </EventTrigger>        </Image.Triggers>      </Image>    </Grid>  </Page>

• Intensity values ideally follow a logarithmic progression, because the eye perceives changes in intensity as being equal when the ratio of change is equal. For example, we would see a change from 0.1 to 0.2 as being equal to a change from 0.2 to 0.4.
• Gamma is a standard constant that is used to calculate the progression. For most CRTs the gamma constant is in the range of 2.2 to 2.5.

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.Color.GammaCorrectCommandBitmapEffect

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

Reference