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Combining Images With Regions
Take the following steps to start a project and to add some code that combines two images with a region:
  1. Start Visual Studio .NET.
  2. Choose File->New->Project… from the menu.
  3. In the New Project dialog box, choose either "Visual C# Projects" or "Visual Basic Projects" in the Projects Type List, and choose "Windows Application " in the Templates List.
  4. Type the project name as "Combining Images with Regions" in the Project Name field, and then choose OK. If desired, type a new location for your project or select a directory using the Browse button, and then choose OK .
  5. In the "Solution Explorer" window, right-click on the "References" folder, and select "Add Reference…" from the context menu. In the "Add Reference" dialog box, select the ".NET" tab and browse to Leadtools For .NET "\LEAD Technologies\LEADTOOLS 16.5\Bin\DotNet\Win32 " folder and select the following DLLs:
    • Leadtools.dll
    • Leadtools.Codecs.dll
    • Leadtools.WinForms.dll
    Click the Select button and then press the OK button to add the above DLLs to the application.
  6. Make sure Form1 is in design view. Go to the toolbox (View->Toolbox) and Drag and drop an instance of RasterImageViewer to the form. If you do not have RasterImageViewer in your toolbox, select Tools->Add Remove Toolbox Items from the menu. Click Browse and then select Leadtools.WinForms.DLL from "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 16.5\Bin\DotNet\Win32" and then click Open and then click OK.
  7. Change the following properties:
    PropertyValue
    DockFill
  8. Switch to Form1 code view (right-click Form1 in the solution explorer then select View Code ) and add the following lines at the beginning of the file:

    [Visual Basic] 

     
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.WinForms
Imports Leadtools.ImageProcessing
    [C#] 
    
using Leadtools;
using Leadtools.Codecs;
using Leadtools.WinForms;
using Leadtools.ImageProcessing;
  9. Add an event handler to the Form1 Load event and add the following code:

    [Visual Basic] 

     
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
   RasterCodecs.Startup()

   ' intitialize a new RasterCodecs object
   Dim codecs As New RasterCodecs()

   ' load the main image into our viewer
   RasterImageViewer1.Image = codecs.Load("C:\Users\Public\Documents\LEADTOOLS Images\Sample1.cmp")

   ' load the temporary image
   Dim tempImage As RasterImage = codecs.Load("C:\Users\Public\Documents\LEADTOOLS Images\Sample2.cmp")
   ' add a region to the image
   tempImage.AddRectangleToRegion(Nothing, New Rectangle(100, 100, 200, 200), RasterRegionCombineMode.Set)

   ' combine
   Dim combine As New CombineFastCommand()
   combine.DestinationImage = RasterImageViewer1.Image
   combine.DestinationRectangle = New Rectangle(0, 0, tempImage.ImageWidth, tempImage.ImageHeight)
   combine.SourcePoint = Point.Empty
   combine.Flags = CombineFastCommandFlags.OperationAverage
   combine.Run(tempImage)
   tempImage.Dispose()

   RasterCodecs.Shutdown()
End Sub
    [C#] 
     
private void Form1_Load(object sender, System.EventArgs e)
{
   RasterCodecs.Startup();

   // intitialize a new RasterCodecs object
   RasterCodecs codecs = new RasterCodecs();

   // load the main image into our viewer
   rasterImageViewer1.Image = codecs.Load(@"C:\Users\Public\Documents\LEADTOOLS Images\Sample1.cmp");

   // load the temporary image
   using(RasterImage tempImage = codecs.Load(@"C:\Users\Public\Documents\LEADTOOLS Images\Sample2.cmp"))
   {
      // add a region to the image
      tempImage.AddRectangleToRegion(null, new Rectangle(100, 100, 200, 200), RasterRegionCombineMode.Set);

      // combine
      CombineFastCommand combine = new CombineFastCommand();
      combine.DestinationImage = rasterImageViewer1.Image;
      combine.DestinationRectangle = new Rectangle(0, 0, tempImage.ImageWidth, tempImage.ImageHeight);
      combine.SourcePoint = Point.Empty;
      combine.Flags = CombineFastCommandFlags.OperationAverage;
      combine.Run(tempImage);
   }

   RasterCodecs.Shutdown();
}
  10. Build, and Run the program to test it.