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.![](dotnetdiagramimages/Leadtools_MedicalViewer_Leadtools_MedicalViewer_MedicalViewerAlpha.png)
Visual Basic (Declaration) | |
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Public Class MedicalViewerAlpha Inherits MedicalViewerCommonActions Implements IDisposable |
Visual Basic (Usage) | ![]() |
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Dim instance As MedicalViewerAlpha |
C# | |
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public class MedicalViewerAlpha : MedicalViewerCommonActions, IDisposable |
C++/CLI | |
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public ref class MedicalViewerAlpha : public MedicalViewerCommonActions, IDisposable |
Change the alpha factor of an image
Visual Basic | ![]() |
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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# | ![]() |
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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(); } |
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.
System.Object
Leadtools.MedicalViewer.MedicalViewerBaseAction
Leadtools.MedicalViewer.MedicalViewerCommonActions
Leadtools.MedicalViewer.MedicalViewerAlpha
Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7