Run the ConvertToColoredGrayCommandBitmapEffect on an image with RedFactor = 300, GreenFactor = 590, BlueFactor = 110, RedGrayFactor = 500, GreenGrayFactor = 300, BlueGrayFactor = 200.

Visual Basic

Copy Code

Public Sub ConvertToColoredGrayCommandBitmapEffectExample(ByVal element As FrameworkElement)    ' Initialize Effect    Dim effect As ConvertToColoredGrayCommandBitmapEffect = New ConvertToColoredGrayCommandBitmapEffect()    effect.RedFactor = 300    effect.GreenFactor = 590    effect.BlueFactor = 110    effect.RedGrayFactor = 500    effect.GreenGrayFactor = 300    effect.BlueGrayFactor = 200    element.BitmapEffect = effect    ' Initialize Animations    Dim animation1 As Int32Animation = New Int32Animation()    animation1.From = 0    animation1.To = 1000    animation1.By = 1    animation1.Duration = New Duration(TimeSpan.FromSeconds(3.0))    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(ConvertToColoredGrayCommandBitmapEffect.BlueGrayFactorProperty))    element.RegisterName("AnimatedBitmapEffect", effect)    storyboard.Children.Add(animation1)    storyboard.Begin(element) End Sub

C#

Copy Code

public void ConvertToColoredGrayCommandBitmapEffectExample(FrameworkElement element)  {       // Initialize Effect     ConvertToColoredGrayCommandBitmapEffect effect = new ConvertToColoredGrayCommandBitmapEffect();     effect.RedFactor = 300;     effect.GreenFactor = 590;     effect.BlueFactor = 110;     effect.RedGrayFactor = 500;     effect.GreenGrayFactor = 300;     effect.BlueGrayFactor = 200;     element.BitmapEffect = effect;       // Initialize Animations     Int32Animation animation1 = new Int32Animation();     animation1.From = 0;     animation1.To = 1000;     animation1.By = 1;     animation1.Duration = new Duration(TimeSpan.FromSeconds(3.0));     animation1.AutoReverse = true;     animation1.RepeatBehavior = RepeatBehavior.Forever;       // Initialize and run Storyboard     Storyboard storyboard = new Storyboard();     Storyboard.SetTargetName(animation1, "AnimatedBitmapEffect");     Storyboard.SetTargetProperty(animation1, new PropertyPath(ConvertToColoredGrayCommandBitmapEffect.BlueGrayFactorProperty));     element.RegisterName("AnimatedBitmapEffect", effect);     storyboard.Children.Add(animation1);       storyboard.Begin(element);  }

XAML

Copy 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.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:ConvertToColoredGrayCommandBitmapEffect x:Name="MyBitmapEffect" />        </Image.BitmapEffect>        <Image.Triggers>          <EventTrigger RoutedEvent="Image.Loaded">            <BeginStoryboard>              <Storyboard>                <Int32Animation Storyboard.TargetName="MyBitmapEffect" Storyboard.TargetProperty="BlueGrayFactor" From="0" To="1000" Duration="0:0:3" RepeatBehavior="Forever" AutoReverse="True" />              </Storyboard>            </BeginStoryboard>          </EventTrigger>        </Image.Triggers>      </Image>    </Grid>  </Page>

• This class is more general than the GrayScaleExtendedCommandBitmapEffect class. The ConvertToColoredGrayCommandBitmapEffect class can be used to give images a "sepia" look by adding a blue or brown color.

• RedFactor + GreenFactor + BlueFactor must equal 1000. (Internally the values are divided by 1000).

• For each pixel in the image the red, green and blue values are modified by the RedFactor, GreenFactor and BlueFactor properties, respectively. This allows the user to give more weight to one color, essentially enhancing that color, before the pixel is converted to grayscale.
• For example, if this class is used with the RedFactor set to 500, the GreenFactor set to 250 and the BlueFactor set to 250, the red value of each pixel will get 50 percent of the weight when determining the grayscale value. The green value will get 25 percent of the weight and the blue value will get 25 percent of the weight when determining the grayscale value. This highlights or enhances the red in the image, prior to conversion to grayscale. Upon conversion to grayscale, the red, green and blue components of the output pixel are the same. Call this value G. Therefore, the RGB values for the pixel would be (G, G, G).
• Once the grayscale value for the pixel has been obtained, the red component of the output pixel can be further modified using the RedGrayFactor value. The equation for this can be seen below:
• The green and blue components are found similarly, using the GreenGrayFactor and the BlueGrayFactor values, respectively.
• Please note that the RedGrayFactor, GreenGrayFactor and BlueGrayFactor values can be negative. A negative value results in a decrease in pixel intensity. A positive value results in an increase in pixel intensity.
• If RedGrayFactor = GreenGrayFactor = BlueGrayFactor = 0, then the output is the same as the output from the GrayScaleExtendedCommandBitmapEffect method.
• This command does not support signed data images.

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.ConvertToColoredGrayCommandBitmapEffect

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

Reference