Public ReadOnly Property OverlayCount As Integer

Dim instance As DicomDataSet
Dim value As Integer
 
value = instance.OverlayCount

public int OverlayCount {get;}

public:
property int OverlayCount {
   int get();
}

Public Sub TestOverlay()
   Dim dicomFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Overlay.dcm"
   'Make sure to initialize the DICOM engine, this needs to be done only once 
   'In the whole application
   DicomEngine.Startup()

   Dim ds As DicomDataSet = New DicomDataSet()
   Using (ds)
      'Load DICOM File
      ds.Load(dicomFileName, DicomDataSetLoadFlags.None)

      If ds.OverlayCount > 0 Then
         Dim attributes As RasterOverlayAttributes = ds.GetOverlayAttributes(0)
         If Not attributes Is Nothing Then
            ' We can call in here methods like GetOverlayGroupNumber, IsOverlayInDataset 
            ' and GetOverlayActivationLayer to get some further infromation about the overlay

            'Let's get the overlay Image, If RasterOverlayAttributes.NumFramesInOverlay 
            'Is greater than 1 we can call GetOverlayImages to extract all the frames
            Dim overlayImage As RasterImage = ds.GetOverlayImage(0)
            If Not overlayImage Is Nothing Then

               Dim ds1 As DicomDataSet = New DicomDataSet()
               Using (ds1)
                  ds1.Initialize(DicomClassType.DXImageStoragePresentation, DicomDataSetInitializeType.ExplicitVRLittleEndian)
                  ds1.SetOverlayAttributes(0, attributes, DicomSetOverlayFlags.None)
                  ds1.SetOverlayImage(0, overlayImage) 'We can call SetOverlayImages if the overlay has more than one frame
                  ds1.Save(LeadtoolsExamples.Common.ImagesPath.Path + "NewOverlay.dcm", DicomDataSetSaveFlags.None)
               End Using

            End If
         End If
      End If
   End Using

   DicomEngine.Shutdown()
End Sub

public void TestOverlay()
{
   string dicomFileName = LeadtoolsExamples.Common.ImagesPath.Path + "Overlay.dcm";
   //Make sure to initialize the DICOM engine, this needs to be done only once 
   //In the whole application
   DicomEngine.Startup();
   using (DicomDataSet ds = new DicomDataSet())
   {
      //Load DICOM File
      ds.Load(dicomFileName, DicomDataSetLoadFlags.None);

      if (ds.OverlayCount > 0)
      {
         RasterOverlayAttributes attributes = ds.GetOverlayAttributes(0);
         if (attributes != null)
         {
            // We can call in here methods like GetOverlayGroupNumber, IsOverlayInDataset 
            // and GetOverlayActivationLayer to get some further infromation about the overlay

            //Let's get the overlay Image, If RasterOverlayAttributes.NumFramesInOverlay 
            //Is greater than 1 we can call GetOverlayImages to extract all the frames
            RasterImage overlayImage = ds.GetOverlayImage(0);
            if (overlayImage != null)
            {
               using (DicomDataSet ds1 = new DicomDataSet())
               {
                  ds1.Initialize(DicomClassType.DXImageStoragePresentation, DicomDataSetInitializeType.ExplicitVRLittleEndian);
                  ds1.SetOverlayAttributes(0, attributes, DicomSetOverlayFlags.None);
                  ds1.SetOverlayImage(0, overlayImage);//We can call SetOverlayImages if the overlay has more than one frame
                  ds1.Save(LeadtoolsExamples.Common.ImagesPath.Path + "NewOverlay.dcm", DicomDataSetSaveFlags.None);
               }
            }
         }
      }
   }
   DicomEngine.Shutdown();
}

public void TestOverlay(Stream dicomStream, Stream outputStream)
{
   //Make sure to initialize the DICOM engine, this needs to be done only once 
   //In the whole application
   DicomEngine.Startup();
   using (DicomDataSet ds = new DicomDataSet())
   {
      //Load DICOM File
      ds.Load(dicomStream, DicomDataSetLoadFlags.None);
      if (ds.OverlayCount > 0)
      {
         RasterOverlayAttributes attributes = ds.GetOverlayAttributes(0);
         if (attributes != null)
         {
            // We can call in here methods like GetOverlayGroupNumber, IsOverlayInDataset 
            // and GetOverlayActivationLayer to get some further infromation about the overlay

            //Let's get the overlay Image, If RasterOverlayAttributes.NumFramesInOverlay 
            //Is greater than 1 we can call GetOverlayImages to extract all the frames
            RasterImage overlayImage = ds.GetOverlayImage(0);
            if (overlayImage != null)
            {
               using (DicomDataSet ds1 = new DicomDataSet())
               {
                  ds1.Initialize(DicomClassType.DXImageStoragePresentation, DicomDataSetInitializeType.ExplicitVRLittleEndian);
                  ds1.SetOverlayAttributes(0, attributes, DicomSetOverlayFlags.None);
                  ds1.SetOverlayImage(0, overlayImage);//We can call SetOverlayImages if the overlay has more than one frame
                  ds1.Save(outputStream, DicomDataSetSaveFlags.None);
               }
            }
         }
      }
   }
   DicomEngine.Shutdown();
}

Public Sub TestOverlay(ByVal dicomStream As Stream, ByVal outputStream As Stream)
   'Make sure to initialize the DICOM engine, this needs to be done only once 
   'In the whole application
   DicomEngine.Startup()
   Using ds As DicomDataSet = New DicomDataSet()
      'Load DICOM File
      ds.Load(dicomStream, DicomDataSetLoadFlags.None)
      If ds.OverlayCount > 0 Then
         Dim attributes As RasterOverlayAttributes = ds.GetOverlayAttributes(0)
         If Not attributes Is Nothing Then
            ' We can call in here methods like GetOverlayGroupNumber, IsOverlayInDataset 
            ' and GetOverlayActivationLayer to get some further infromation about the overlay

            'Let's get the overlay Image, If RasterOverlayAttributes.NumFramesInOverlay 
            'Is greater than 1 we can call GetOverlayImages to extract all the frames
            Dim overlayImage As RasterImage = ds.GetOverlayImage(0)
            If Not overlayImage Is Nothing Then
               Using ds1 As DicomDataSet = New DicomDataSet()
                  ds1.Initialize(DicomClassType.DXImageStoragePresentation, DicomDataSetInitializeType.ExplicitVRLittleEndian)
                  ds1.SetOverlayAttributes(0, attributes, DicomSetOverlayFlags.None)
                  ds1.SetOverlayImage(0, overlayImage) 'We can call SetOverlayImages if the overlay has more than one frame
                  ds1.Save(outputStream, DicomDataSetSaveFlags.None)
               End Using
            End If
         End If
      End If
   End Using
   DicomEngine.Shutdown()
End Sub