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MedicalViewerAlpha Class
See Also  Members  
Leadtools.MedicalViewer Namespace : MedicalViewerAlpha Class



The MedicalViewerAlpha Class is available as an add-on to the LEADTOOLS Medical Imaging toolkits.

Represents the class that contains the properties of the alpha channel.

Object Model

MedicalViewerAlpha Class

Syntax

Visual Basic (Declaration) 
Public Class MedicalViewerAlpha 
   Inherits MedicalViewerCommonActions
   Implements IDisposable 
Visual Basic (Usage)Copy Code
Dim instance As MedicalViewerAlpha
C# 
public class MedicalViewerAlpha : MedicalViewerCommonActions, IDisposable  
C++/CLI 
public ref class MedicalViewerAlpha : public MedicalViewerCommonActions, IDisposable  

Example

Change the alpha factor of an image

Visual BasicCopy Code
Public Sub MedicalViewerAlphaExample1()
   Dim myForm As MedicalViewerForm = GetMedicalControl()
   Dim medicalViewer As MedicalViewer = myForm.Viewer
   Dim cell As MedicalViewerMultiCell = CType(medicalViewer.Cells(0), MedicalViewerMultiCell)

   Dim windowLevel As MedicalViewerWindowLevel = CType(cell.GetActionProperties(MedicalViewerActionType.WindowLevel, 0), MedicalViewerWindowLevel)

   Select Case windowLevel.LookupTableType
      Case MedicalViewerLookupTableType.Exponential, MedicalViewerLookupTableType.Logarithmic, MedicalViewerLookupTableType.Sigmoid
         Dim alpha As MedicalViewerAlpha = CType(cell.GetActionProperties(MedicalViewerActionType.Alpha, 0), MedicalViewerAlpha)
         alpha.Alpha += 100
         cell.SetActionProperties(MedicalViewerActionType.Alpha, alpha, 0)
         alpha.Dispose()
      Case Else
   End Select
   windowLevel.Dispose()
   myForm.ShowDialog()
End Sub
C#Copy Code
public void MedicalViewerAlphaExample1()
{
   MedicalViewerForm myForm  = GetMedicalControl();
   MedicalViewer medicalViewer = myForm.Viewer;
   MedicalViewerMultiCell cell = (MedicalViewerMultiCell)(medicalViewer.Cells[0]);

   MedicalViewerWindowLevel windowLevel = (MedicalViewerWindowLevel)cell.GetActionProperties(MedicalViewerActionType.WindowLevel, 0);

   switch(windowLevel.LookupTableType)
   {
      case MedicalViewerLookupTableType.Exponential:
      case MedicalViewerLookupTableType.Logarithmic:
      case MedicalViewerLookupTableType.Sigmoid:
         MedicalViewerAlpha alpha = (MedicalViewerAlpha)cell.GetActionProperties(MedicalViewerActionType.Alpha, 0);
         alpha.Alpha += 100;
         cell.SetActionProperties(MedicalViewerActionType.Alpha, alpha, 0);
         alpha.Dispose();
         break;
      default:
         break;
   }
   windowLevel.Dispose();
   myForm.ShowDialog();
}

Remarks

To set the properties of the alpha channel, call the MedicalViewerBaseCell.SetActionProperties method. To retrieve the properties call the MedicalViewerBaseCell.GetActionProperties method.

Alpha is the standard name for the Factor Value that indicates the factor to be applied to the lookup table. It is important to set the value of the lookup table to one of the following types: Sigmoid, Logarithmic or exponential. Valid values range from -1000 to 1000.

The mouse controls the actions as follows:

  • Click and hold the mouse to start the effect. When the assigned mouse button is released the action ends.
  • Dragging the mouse to the left decreases the center parameter.
  • Dragging the mouse to the right increases the center parameter.
  • Dragging the mouse up decreases the width parameter.
  • Dragging the mouse down increases the width parameter.

Inheritance Hierarchy

System.Object
   Leadtools.MedicalViewer.MedicalViewerBaseAction
      Leadtools.MedicalViewer.MedicalViewerCommonActions
         Leadtools.MedicalViewer.MedicalViewerAlpha

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7

See Also

Leadtools.MedicalViewer requires a Medical Imaging license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features