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RasterRegionConverter Class

Summary

Converts between a LEADTOOLS Leadtools.RasterRegion and Windows Presentation Foundation (WPF) System.Windows.Media.Geometry objects.

Syntax
C#
VB
C++
public static class RasterRegionConverter 
  
Public MustInherit NotInheritable Class RasterRegionConverter  
public ref class RasterRegionConverter abstract sealed  

Remarks

This class lets you easily convert between a LEADTOOLS Leadtools.RasterRegion object and a WPF System.Windows.Media.Geometry object.

The LEADTOOLS Leadtools.RasterRegion class provides a platform independent representation of an area of interest in a Leadtools.RasterImage that can be used in any platform supported by LEADTOOLS such as GDI, GDI+, and WPF. Use this class To convert a LEADTOOLS Leadtools.RasterRegion object to/from a WPF System.Windows.Media.Geometry object.

For more information refer to RasterImage and WPF.

Example
C#
VB
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.Windows.Media; 
 
public void RasterRegionConverterExample() 
{ 
   // Load an image  
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
   string dstFileName1 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_Ellipse.jpg"); 
   string dstFileName2 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_EllipseTranslated.jpg"); 
 
   RasterCodecs codecs = new RasterCodecs(); 
 
   RasterImage image = codecs.Load(srcFileName); 
 
   // We will add an ellipse region to the image 
 
   // Using WPF, create an elliptical geometry 
   // Create the ellipse geometry to add to the Path 
   EllipseGeometry ellipseGeometry = new EllipseGeometry(); 
   ellipseGeometry.Center = new Point(250, 250); 
   ellipseGeometry.RadiusX = 200; 
   ellipseGeometry.RadiusY = 150; 
 
   Geometry geometry = ellipseGeometry; 
 
   // Create a RasterRegion from this region 
   using (RasterRegion region = RasterRegionConverter.ConvertFromGeometry(geometry)) 
   { 
      // Add this region to the image 
      image.SetRegion(null, region, RasterRegionCombineMode.Set); 
   } 
 
   // Fill the image with a color 
   FillCommand cmd = new FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Red)); 
   cmd.Run(image); 
 
   // Save it 
   codecs.Save(image, dstFileName1, RasterImageFormat.Jpeg, 24); 
 
   // Now get the WPF geometry from the image 
   using (RasterRegion region = image.GetRegion(null)) 
   { 
      geometry = RasterRegionConverter.ConvertToGeometry(region, null); 
   } 
 
   // Move the geometry 100 pixels to the right and bottom 
   geometry.Transform = new TranslateTransform(100, 100); 
 
   // Re-set it into the image, fill again and save 
   // Create a RasterRegion from this region 
   using (RasterRegion region = RasterRegionConverter.ConvertFromGeometry(geometry)) 
   { 
      // Add this region to the image 
      image.SetRegion(null, region, RasterRegionCombineMode.Set); 
   } 
 
   // Fill the image with a color 
   cmd = new FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Yellow)); 
   cmd.Run(image); 
 
   // Save it 
   codecs.Save(image, dstFileName2, RasterImageFormat.Jpeg, 24); 
 
   image.Dispose(); 
 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
} 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing 
Imports Leadtools.Windows.Media 
 
Public Sub RasterRegionConverterExample() 
   ' Load an image  
   Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp") 
   Dim dstFileName1 As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_Ellipse.jpg") 
   Dim dstFileName2 As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_EllipseTranslated.jpg") 
 
   Dim codecs As New RasterCodecs() 
 
   Dim image As RasterImage = codecs.Load(srcFileName) 
 
   ' We will add an ellipse region to the image 
 
   ' Using WPF, create an elliptical geometry 
   ' Create the ellipse geometry to add to the Path 
   Dim ellipseGeometry As New EllipseGeometry() 
   ellipseGeometry.Center = New Point(250, 250) 
   ellipseGeometry.RadiusX = 200 
   ellipseGeometry.RadiusY = 150 
 
   Dim geometry As Geometry = ellipseGeometry 
 
   ' Create a RasterRegion from this region 
   Using region As RasterRegion = RasterRegionConverter.ConvertFromGeometry(geometry) 
      ' Add this region to the image 
      image.SetRegion(Nothing, region, RasterRegionCombineMode.Set) 
   End Using 
 
   ' Fill the image with a color 
   Dim cmd As New FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Red)) 
   cmd.Run(image) 
 
   ' Save it 
   codecs.Save(image, dstFileName1, RasterImageFormat.Jpeg, 24) 
 
   ' Now get the WPF geometry from the image 
   Using region As RasterRegion = image.GetRegion(Nothing) 
      geometry = RasterRegionConverter.ConvertToGeometry(region, Nothing) 
   End Using 
 
   ' Move the geometry 100 pixels to the right and bottom 
   geometry.Transform = New TranslateTransform(100, 100) 
 
   ' Re-set it into the image, fill again and save 
   ' Create a RasterRegion from this region 
   Using region As RasterRegion = RasterRegionConverter.ConvertFromGeometry(geometry) 
      ' Add this region to the image 
      image.SetRegion(Nothing, region, RasterRegionCombineMode.Set) 
   End Using 
 
   ' Fill the image with a color 
   cmd = New FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Yellow)) 
   cmd.Run(image) 
 
   ' Save it 
   codecs.Save(image, dstFileName2, RasterImageFormat.Jpeg, 24) 
 
   image.Dispose() 
 
   codecs.Dispose() 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class 
c#[Silverlight C# Example] 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.Windows.Media; 
 
public void RasterRegionConverterExample() 
{ 
   // Load an image  
   string srcFileName = LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp"; 
 
   RasterCodecs codecs = new RasterCodecs(); 
 
   RasterImage image = codecs.Load(srcFileName); 
 
   // We will add a region to the image 
   RasterRegion region = new RasterRegion(new LeadRect(250, 250, 200, 150)); 
   image.SetRegion(null, region, RasterRegionCombineMode.Set); 
 
   // Now get the WPF geometry from the image 
   Geometry geometry; 
   using (RasterRegion rgn = image.GetRegion(null)) 
   { 
      geometry = RasterRegionConverter.ConvertToGeometry(region, null); 
 
      // Create a Path to be drawn to the screen. 
      System.Windows.Shapes.Path myPath = new System.Windows.Shapes.Path(); 
      SolidColorBrush mySolidColorBrush = new SolidColorBrush(); 
      mySolidColorBrush.Color = Color.FromArgb(255, 204, 204, 255); 
      myPath.Fill = mySolidColorBrush; 
      myPath.Data = geometry; 
 
      // Add path shape to the UI. 
      StackPanel mainPanel = new StackPanel(); 
      mainPanel.Children.Add(myPath); 
   } 
 
   image.Dispose(); 
} 
vb[Silverlight VB Example] 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing 
Imports Leadtools.Windows.Media 
 
Public Sub RasterRegionConverterExample() 
   ' Load an image  
   Dim srcFileName As String = LeadtoolsExamples.Common.ImagesPath.Path & "Image1.cmp" 
 
   Dim codecs As RasterCodecs = New RasterCodecs() 
 
   Dim image As RasterImage = codecs.Load(srcFileName) 
 
   ' We will add a region to the image 
   Dim region As RasterRegion = New RasterRegion(New LeadRect(250, 250, 200, 150)) 
   image.SetRegion(Nothing, region, RasterRegionCombineMode.Set) 
 
   ' Now get the WPF geometry from the image 
   Dim geometry As Geometry 
   Using rgn As RasterRegion = image.GetRegion(Nothing) 
      geometry = RasterRegionConverter.ConvertToGeometry(region, Nothing) 
 
      ' Create a Path to be drawn to the screen. 
      Dim myPath As System.Windows.Shapes.Path = New System.Windows.Shapes.Path() 
      Dim mySolidColorBrush As SolidColorBrush = New SolidColorBrush() 
      mySolidColorBrush.Color = Color.FromArgb(255, 204, 204, 255) 
      myPath.Fill = mySolidColorBrush 
      myPath.Data = geometry 
 
      ' Add path shape to the UI. 
      Dim mainPanel As StackPanel = New StackPanel() 
      mainPanel.Children.Add(myPath) 
   End Using 
 
   image.Dispose() 
End Sub 

Requirements

Target Platforms

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