MedicalViewerAlpha Class

Summary

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

Syntax
C#
VB
C++
public class MedicalViewerAlpha : MedicalViewerCommonActions 
  
Public Class MedicalViewerAlpha  
   Inherits MedicalViewerCommonActions 
   Implements System.IDisposable  
            public ref class MedicalViewerAlpha : public MedicalViewerCommonActions, System.IDisposable   

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.

Example

Change the alpha factor of an image

C#
VB
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.MedicalViewer; 
 
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(); 
} 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.MedicalViewer 
 
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 

Requirements

Target Platforms

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Leadtools.MedicalViewer Assembly