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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

Java

Objective-C

WinRT C#

C++

public class GetLinearVoiLookupTableCommand : Leadtools.Imageprocessing.Leadtools.ImageProcessing.RasterCommand, Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand

Public Class GetLinearVoiLookupTableCommand  
   Inherits Leadtools.Imageprocessing.Leadtools.ImageProcessing.RasterCommand 
   Implements Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand

public sealed class GetLinearVoiLookupTableCommand : Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand

@interface LTGetLinearVoiLookupTableCommand : LTRasterCommand

public class GetLinearVoiLookupTableCommand extends RasterCommand

function Leadtools.ImageProcessing.Core.GetLinearVoiLookupTableCommand()

public ref class GetLinearVoiLookupTableCommand : public Leadtools.Imageprocessing.Leadtools.ImageProcessing.RasterCommand, Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand

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.

In Silverlight versions of LEADTOOLS, this image processing command will fail if the image data for the RasterImage object is stored internally using a Silverlight WriteableBitmap object. For more information, refer to Image Processing Command Limitations in Silverlight.

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.

WinRT C#

Silverlight C#

Silverlight VB

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

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"; 
}

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
       
public async Task GetLinearVoiLookupTableCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
   // Load the image 
   string srcFileName = @"Assets\IMAGE2.dcm"; 
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName); 
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile)); 
 
   // Prepare the command 
   GetLinearVoiLookupTableCommand command = new GetLinearVoiLookupTableCommand(); 
   command.Flags = GetLinearVoiLookupTableCommandFlags.None; 
   command.Run(image); 
   Debug.WriteLine("Width  = " + command.Width + "\n" + "Center = " + command.Center); 
 
}

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(); 
}

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

Requirements

Target Platforms

See Also

Reference

GetLinearVoiLookupTableCommand Members

Leadtools.ImageProcessing.Core Namespace

WindowLevelCommand Class

Leadtools.RasterPalette.WindowLevelFillLookupTable(Leadtools.RasterColor[],Leadtools.RasterColor,Leadtools.RasterColor,System.Int32,System.Int32,System.Int32,System.Int32,System.Int32,System.Int32,System.Int32,Leadtools.RasterPaletteWindowLevelFlags)

Leadtools.ImageProcessing.Effects.EffectsUtilities.GetUserLookupTable(System.Int32[],Leadtools.LeadPoint[])

Leadtools.ImageProcessing.Color.RemapIntensityCommand

ApplyLinearVoiLookupTableCommand Class