GetLinearVoiLookupTableCommand Class

C#
Visual Basic
WinRT C#
Java
Objective-C
WinRT JavaScript
C++

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

'Declaration

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

'Usage

Dim instance As GetLinearVoiLookupTableCommand

public sealed class GetLinearVoiLookupTableCommand : Leadtools.ImageProcessing.IRasterCommand

@interface LTGetLinearVoiLookupTableCommand : LTRasterCommand

public class GetLinearVoiLookupTableCommand extends RasterCommand

function Leadtools.ImageProcessing.Core.GetLinearVoiLookupTableCommand()

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

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.

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

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

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";
}

function GetLinearVoiLookupTableCommandExample()
{
   var codecs = new Leadtools.Codecs.RasterCodecs();
   codecs.throwExceptionsOnInvalidImages = true;

   // Load the image
   var srcFileName = "Assets\\IMAGE2.dcm";
   return Tools.AppInstallFolder().getFileAsync(srcFileName).then(function (loadFile) {
      return codecs.loadAsync(Leadtools.LeadStreamFactory.create(loadFile));
   }).then(function (image) {
      // Prepare the command
      with (Leadtools.ImageProcessing.Core) {
         var command = new GetLinearVoiLookupTableCommand();
         command.flags = GetLinearVoiLookupTableCommandFlags.none;
         command.run(image);
         console.error("Width  = " + command.width + "\n" + "Center = " + command.center);
      }
   });
}

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

Target Platforms

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