GetLinearVoiLookupTableCommand Class

Summary

Gets the window center and the window width, if the LookupTable stored inside the image is linear. If the LookupTable stored inside the image is not linear, the command will fail.

Syntax

Objective-C

C++

Java

public class GetLinearVoiLookupTableCommand : RasterCommand

Public Class GetLinearVoiLookupTableCommand  
   Inherits RasterCommand

@interface LTGetLinearVoiLookupTableCommand : LTRasterCommand

public class GetLinearVoiLookupTableCommand extends RasterCommand

public ref class GetLinearVoiLookupTableCommand : public RasterCommand

Remarks

Pay attention to lookup tables for signed images. The upper half should contain negative values and the lower half should contain positive values.
This class supports 12 and 16-bit grayscale images. Support for 12 and 16-bit grayscale images is available only in the Document/Medical toolkits.
This command does not support 32-bit grayscale images.

Example

Run the GetLinearVoiLookupTableCommand on the image. and checks the linearity of the LookupTable and computes its window width and center by using this method.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void GetLinearVoiLookupTableCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE2.dcm")); 
 
   // Prepare the command 
   GetLinearVoiLookupTableCommand command = new GetLinearVoiLookupTableCommand(); 
   command.Flags = GetLinearVoiLookupTableCommandFlags.None; 
   command.Run(image); 
   MessageBox.Show("Width  = " + command.Width + "\n" + "Center = " + command.Center); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
 
Public Sub GetLinearVoiLookupTableCommandExample() 
   Dim codecs As New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE2.dcm")) 
 
   ' Prepare the command 
   Dim command As GetLinearVoiLookupTableCommand = New GetLinearVoiLookupTableCommand 
   command.Flags = GetLinearVoiLookupTableCommandFlags.None 
   command.Run(leadImage) 
   MessageBox.Show("Width  = " + command.Width.ToString + "\n" + "Center = " + command.Center.ToString) 
 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class

c#[Silverlight C# Example] 
using Leadtools; 
using Leadtools.Examples; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void GetLinearVoiLookupTableCommandExample(RasterImage image) 
{ 
   // Prepare the command 
   GetLinearVoiLookupTableCommand command = new GetLinearVoiLookupTableCommand(); 
   command.Flags = GetLinearVoiLookupTableCommandFlags.None; 
   command.Run(image); 
   Debug.WriteLine("Width  = " + command.Width + "\n" + "Center = " + command.Center); 
   image.Dispose(); 
} 
vb[Silverlight VB Example] 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
 
Public Sub GetLinearVoiLookupTableCommandExample(ByVal image As RasterImage) 
   ' Prepare the command 
   Dim command As GetLinearVoiLookupTableCommand = New GetLinearVoiLookupTableCommand() 
   command.Flags = GetLinearVoiLookupTableCommandFlags.None 
   command.Run(image) 
   Debug.WriteLine("Width  = " & command.Width + Constants.vbLf & "Center = " & command.Center) 
   image.Dispose() 
End Sub