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

WindowLevelEffect Class

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Example 





Members 
Leadtools.Windows.Media.Effects Namespace : WindowLevelEffect Class
Fills and applies window leveling on the specified image.
Object Model
Syntax
'Declaration
 
Public Class WindowLevelEffect 
   Inherits System.Windows.Media.Effects.ShaderEffect
   Implements System.Windows.Media.Animation.IAnimatable 
'Usage
 
Dim instance As WindowLevelEffect

            

        

            

            

            

        

            
        

            

        

            
            
            
            
Remarks
Provides "on demand" window-leveling as an effect and does not alter the image data.



To learn more about window-leveling, refer to RasterImage.WindowLevel, RasterImage.WindowLevelExt, WindowLevelCommand and Leadtools.ImageProcessing.Core.WindowLevelExtCommand.

            
            
            
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 WindowLevelEffectExampleWindow
   Inherits Window
   Public Sub New()
      Dim sp As New StackPanel()
      Content = sp
      Dim theViewer As New RasterImageViewer()

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

      sp.Children.Add(theViewer)

      ' Load an image into the viewer
      Using codecs As New RasterCodecs()
         theViewer.Image = codecs.Load(System.IO.Path.Combine(LEAD_VARS.ImagesDir, "Image3.dcm"))
      End Using

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

      Dim windowWidthSlider As New Slider()
      windowWidthSlider.Minimum = 0.0
      windowWidthSlider.Maximum = Math.Pow(2, theViewer.Image.BitsPerPixel - 1)
      windowWidthSlider.Width = 400
      windowWidthSlider.Orientation = Orientation.Horizontal
      windowWidthSlider.IsSnapToTickEnabled = True
      windowWidthSlider.TickPlacement = System.Windows.Controls.Primitives.TickPlacement.BottomRight
      windowWidthSlider.TickFrequency = 0.1
      windowWidthSlider.AutoToolTipPrecision = 2
      windowWidthSlider.AutoToolTipPlacement = System.Windows.Controls.Primitives.AutoToolTipPlacement.BottomRight

      sp.Children.Add(windowWidthSlider)

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

      Dim windowCenterSlider As New Slider()
      windowCenterSlider.Minimum = 0.0
      windowCenterSlider.Maximum = Math.Pow(2, theViewer.Image.BitsPerPixel - 1)
      windowCenterSlider.Width = 400
      windowCenterSlider.Orientation = Orientation.Horizontal
      windowCenterSlider.IsSnapToTickEnabled = True
      windowCenterSlider.TickPlacement = System.Windows.Controls.Primitives.TickPlacement.BottomRight
      windowCenterSlider.TickFrequency = 0.1
      windowCenterSlider.AutoToolTipPrecision = 2
      windowCenterSlider.AutoToolTipPlacement = System.Windows.Controls.Primitives.AutoToolTipPlacement.BottomRight

      sp.Children.Add(windowCenterSlider)

      ' Setup the effect
      Dim effect As New WindowLevelEffect()

      ' Set the texture
      effect.FillGrayTexture(theViewer.Image)
      effect.Start = Colors.Black
      effect.End = Colors.White
      effect.CurveType = CurveType.Linear
      effect.Factor = 0.0

      effect.WindowWidth = Math.Pow(2, theViewer.Image.MaxValue - theViewer.Image.MinValue)
      effect.WindowCenter = effect.WindowWidth / 2

      theViewer.ImageEffect = effect

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

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

      Title = "Using WindowLevelEffect"
   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 WindowLevelEffectExampleWindow : Window
{
   public WindowLevelEffectExampleWindow()
   {
      StackPanel sp = new StackPanel();
      Content = sp;
      RasterImageViewer theViewer = new RasterImageViewer();

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

      sp.Children.Add(theViewer);

      // Load an image into the viewer
      using(RasterCodecs codecs = new RasterCodecs())
      {
         theViewer.Image = codecs.Load(System.IO.Path.Combine(LEAD_VARS.ImagesDir, "Image3.dcm"));
      }

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

      Slider windowWidthSlider = new Slider();
      windowWidthSlider.Minimum = 0.0;
      windowWidthSlider.Maximum = Math.Pow(2, theViewer.Image.BitsPerPixel - 1);
      windowWidthSlider.Width = 400;
      windowWidthSlider.Orientation = Orientation.Horizontal;
      windowWidthSlider.IsSnapToTickEnabled = true;
      windowWidthSlider.TickPlacement = System.Windows.Controls.Primitives.TickPlacement.BottomRight;
      windowWidthSlider.TickFrequency = 0.1;
      windowWidthSlider.AutoToolTipPrecision = 2;
      windowWidthSlider.AutoToolTipPlacement = System.Windows.Controls.Primitives.AutoToolTipPlacement.BottomRight;

      sp.Children.Add(windowWidthSlider);

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

      Slider windowCenterSlider = new Slider();
      windowCenterSlider.Minimum = 0.0;
      windowCenterSlider.Maximum = Math.Pow(2, theViewer.Image.BitsPerPixel - 1);
      windowCenterSlider.Width = 400;
      windowCenterSlider.Orientation = Orientation.Horizontal;
      windowCenterSlider.IsSnapToTickEnabled = true;
      windowCenterSlider.TickPlacement = System.Windows.Controls.Primitives.TickPlacement.BottomRight;
      windowCenterSlider.TickFrequency = 0.1;
      windowCenterSlider.AutoToolTipPrecision = 2;
      windowCenterSlider.AutoToolTipPlacement = System.Windows.Controls.Primitives.AutoToolTipPlacement.BottomRight;

      sp.Children.Add(windowCenterSlider);

      // Setup the effect
      WindowLevelEffect effect = new WindowLevelEffect();

      // Set the texture
      effect.FillGrayTexture(theViewer.Image);
      effect.Start = Colors.Black;
      effect.End = Colors.White;
      effect.CurveType = CurveType.Linear;
      effect.Factor = 0.0;

      effect.WindowWidth = Math.Pow(2, theViewer.Image.MaxValue - theViewer.Image.MinValue);
      effect.WindowCenter = effect.WindowWidth / 2;

      theViewer.ImageEffect = effect;

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

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

      Title = "Using WindowLevelEffect";
   }
}

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 WindowLevelEffectExampleWindow : UserControl
{
   public WindowLevelEffectExampleWindow()
   {
      StackPanel sp = new StackPanel();
      Content = sp;
      RasterImageViewer theViewer = new RasterImageViewer();

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

      sp.Children.Add(theViewer);

      // Load an image into the viewer
      //using(RasterCodecs codecs = new RasterCodecs())
      {
         RasterCodecs codecs = new RasterCodecs();
         theViewer.Image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Image3.dcm");
      }

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

      Slider windowWidthSlider = new Slider();
      windowWidthSlider.Minimum = 0.0;
      windowWidthSlider.Maximum = Math.Pow(2, theViewer.Image.BitsPerPixel - 1);
      windowWidthSlider.Width = 400;
      windowWidthSlider.Orientation = Orientation.Horizontal;

      sp.Children.Add(windowWidthSlider);

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

      Slider windowCenterSlider = new Slider();
      windowCenterSlider.Minimum = 0.0;
      windowCenterSlider.Maximum = Math.Pow(2, theViewer.Image.BitsPerPixel - 1);
      windowCenterSlider.Width = 400;
      windowCenterSlider.Orientation = Orientation.Horizontal;

      sp.Children.Add(windowCenterSlider);

      // Setup the effect
      WindowLevelEffect effect = new WindowLevelEffect();

      // Set the texture
      effect.FillGrayTexture(theViewer.Image);
      effect.Start = Colors.Black;
      effect.End = Colors.White;
      effect.CurveType = CurveType.Linear;
      effect.Factor = 0.0;

      effect.WindowWidth = Math.Pow(2, theViewer.Image.MaxValue - theViewer.Image.MinValue);
      effect.WindowCenter = effect.WindowWidth / 2;

      theViewer.ImageEffect = effect;

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

      bind = new Binding();
      bind.Source = effect;
      bind.UpdateSourceTrigger = UpdateSourceTrigger.Default;
      bind.Path = new PropertyPath("WindowCenter");
      windowCenterSlider.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 WindowLevelEffectExampleWindow
   Inherits UserControl
   Public Sub New()
      Dim sp As New StackPanel()
      Content = sp
      Dim theViewer As New RasterImageViewer()

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

      sp.Children.Add(theViewer)

      ' Load an image into the viewer
      Dim codecs As New RasterCodecs()
      theViewer.Image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Image3.dcm")

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

      Dim windowWidthSlider As New Slider()
      windowWidthSlider.Minimum = 0.0
      windowWidthSlider.Maximum = Math.Pow(2, theViewer.Image.BitsPerPixel - 1)
      windowWidthSlider.Width = 400
      windowWidthSlider.Orientation = Orientation.Horizontal

      sp.Children.Add(windowWidthSlider)

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

      Dim windowCenterSlider As New Slider()
      windowCenterSlider.Minimum = 0.0
      windowCenterSlider.Maximum = Math.Pow(2, theViewer.Image.BitsPerPixel - 1)
      windowCenterSlider.Width = 400
      windowCenterSlider.Orientation = Orientation.Horizontal

      sp.Children.Add(windowCenterSlider)

      ' Setup the effect
      Dim effect As New WindowLevelEffect()

      ' Set the texture
      effect.FillGrayTexture(theViewer.Image)
      effect.Start = Colors.Black
      effect.End = Colors.White
      effect.CurveType = CurveType.Linear
      effect.Factor = 0.0

      effect.WindowWidth = Math.Pow(2, theViewer.Image.MaxValue - theViewer.Image.MinValue)
      effect.WindowCenter = effect.WindowWidth / 2

      theViewer.ImageEffect = effect

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

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

            

   

      
	
      
	
    

            
           
            
Requirements
Target Platforms

            
            
See Also
Reference
WindowLevelEffect Members

Leadtools.Windows.Media.Effects Namespace

Introduction




        
    

	
    

        

 
 
          

























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