LEADTOOLS Image Processing (Leadtools.ImageProcessing.Core assembly)
LEAD Technologies, Inc

ApplyModalityLookupTableCommand Class

Example 





Members 
Remaps the image pixels through a LookupTable (LookupTable). This class is available in the Document/Medical Toolkits only. .NET support WinRT support Silverlight support
Object Model
ApplyModalityLookupTableCommand ClassDicomLookupTableDescriptor Class
Syntax
public class ApplyModalityLookupTableCommand : Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand  
'Declaration
 
Public Class ApplyModalityLookupTableCommand 
   Inherits Leadtools.ImageProcessing.RasterCommand
   Implements Leadtools.ImageProcessing.IRasterCommand 
'Usage
 
Dim instance As ApplyModalityLookupTableCommand
public sealed class ApplyModalityLookupTableCommand : Leadtools.ImageProcessing.IRasterCommand  
function Leadtools.ImageProcessing.Core.ApplyModalityLookupTableCommand()
public ref class ApplyModalityLookupTableCommand : public Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand  
Remarks
For more information, refer to Changing Brightness and Contrast.

In Silverlight and Windows Phone 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
 
Public Sub ApplyModalityLookupTableCommandExample()
   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 i As Integer
   Dim pLookupTable() As Short
   ReDim pLookupTable(65535)
   Dim LookupTableDescriptor As DicomLookupTableDescriptor = New DicomLookupTableDescriptor

   ' set a LookupTable which reduces the intensity of each pixel to half
   For i = 0 To 65535
      pLookupTable(i) = CType(i \ 2, Int16)
   Next


   ' fill the LookupTableDescriptor object
   LookupTableDescriptor.FirstStoredPixelValueMapped = 0
   LookupTableDescriptor.EntryBits = 16

   ' apply the LookupTable
   Dim command As ApplyModalityLookupTableCommand = New ApplyModalityLookupTableCommand
   command.Flags = ModalityLookupTableCommandFlags.None
   command.LookupTable = pLookupTable
   command.LookupTableDescriptor = LookupTableDescriptor
   command.Run(leadImage)

End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
public void ApplyModalityLookupTableCommandExample()
   {
      // Load an image
      RasterCodecs codecs = new RasterCodecs();
      codecs.ThrowExceptionsOnInvalidImages = true;

      RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE2.dcm"));

      // Prepare the command
      int                i; 
      short[] pLookupTable = new short[0x10000]; 
      DicomLookupTableDescriptor LookupTableDescriptor = new DicomLookupTableDescriptor();

      // set a LookupTable which reduces the intensity of each pixel to half
      for(i = 0; i <= 0xFFFF; i++)
         pLookupTable[i] = (short)(i / 2);

      // fill the LookupTableDescriptor object
      LookupTableDescriptor.FirstStoredPixelValueMapped = 0; 
      LookupTableDescriptor.EntryBits = 16; 

      // apply the LookupTable
      ApplyModalityLookupTableCommand command = new ApplyModalityLookupTableCommand();
      command.Flags = ModalityLookupTableCommandFlags.None;
      command.LookupTable = pLookupTable;
      command.LookupTableDescriptor = LookupTableDescriptor;
      command.Run(image);

   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}
function ApplyModalityLookupTableCommandExample()
{
   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){
      with (Leadtools.ImageProcessing.Core) {
         // Prepare the command
         var i; 
         var pLookupTable = new Array();; 
         var LookupTableDescriptor = new DicomLookupTableDescriptor();

         // set a LookupTable which reduces the intensity of each pixel to half
         for(i = 0; i <= 0xFFFF; i++)
            pLookupTable[i] = parseInt(i / 2);
         
         // fill the LookupTableDescriptor object
         LookupTableDescriptor.firstStoredPixelValueMapped = 0; 
         LookupTableDescriptor.entryBits = 16; 
         
         // apply the LookupTable
         var command = new ApplyModalityLookupTableCommand();
         command.flags = ModalityLookupTableCommandFlags.none;
         command.lookupTable = pLookupTable;
         command.lookupTableDescriptor = LookupTableDescriptor;
         command.run(image);
      }
   });
}
[TestMethod]
public async Task ApplyModalityLookupTableCommandExample()
{
   // 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
   int                i; 
   short[] pLookupTable = new short[0x10000]; 
   DicomLookupTableDescriptor LookupTableDescriptor = new DicomLookupTableDescriptor();

   // set a LookupTable which reduces the intensity of each pixel to half
   for(i = 0; i <= 0xFFFF; i++)
      pLookupTable[i] = (short)(i / 2);

   // fill the LookupTableDescriptor object
   LookupTableDescriptor.FirstStoredPixelValueMapped = 0; 
   LookupTableDescriptor.EntryBits = 16; 

   // apply the LookupTable
   ApplyModalityLookupTableCommand command = new ApplyModalityLookupTableCommand();
   command.Flags = ModalityLookupTableCommandFlags.None;
   command.LookupTable = pLookupTable;
   command.LookupTableDescriptor = LookupTableDescriptor;
   command.Run(image);
}
public void ApplyModalityLookupTableCommandExample(RasterImage image, Stream outStream)
{
   // Prepare the command
   int i;
   short[] pLookupTable = new short[0x10000];
   DicomLookupTableDescriptor LookupTableDescriptor = new DicomLookupTableDescriptor();
   // set a LookupTable which reduces the intensity of each pixel to half
   for (i = 0; i <= 0xFFFF; i++)
      pLookupTable[i] = (short)(i / 2);

   // fill the LookupTableDescriptor object
   LookupTableDescriptor.FirstStoredPixelValueMapped = 0;
   LookupTableDescriptor.EntryBits = 16;

   // apply the LookupTable
   ApplyModalityLookupTableCommand command = new ApplyModalityLookupTableCommand();
   command.Flags = ModalityLookupTableCommandFlags.None;
   command.LookupTable = pLookupTable;
   command.LookupTableDescriptor = LookupTableDescriptor;
   command.Run(image);

   // Save result image
   RasterCodecs codecs = new RasterCodecs();
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24);
   image.Dispose();
}
Public Sub ApplyModalityLookupTableCommandExample(ByVal image As RasterImage, ByVal outStream As Stream)
   ' Prepare the command
   Dim i As Integer
   Dim pLookupTable As Short() = New Short(&H10000 - 1){}
   Dim LookupTableDescriptor As DicomLookupTableDescriptor = New DicomLookupTableDescriptor()
   ' set a LookupTable which reduces the intensity of each pixel to half
   i = 0
   Do While i <= &HFFFF
      pLookupTable(i) = CShort(i / 2)
      i += 1
   Loop

   ' fill the LookupTableDescriptor object
   LookupTableDescriptor.FirstStoredPixelValueMapped = 0
   LookupTableDescriptor.EntryBits = 16

   ' apply the LookupTable
   Dim command As ApplyModalityLookupTableCommand = New ApplyModalityLookupTableCommand()
   command.Flags = ModalityLookupTableCommandFlags.None
   command.LookupTable = pLookupTable
   command.LookupTableDescriptor = LookupTableDescriptor
   command.Run(image)

   ' Save result image
   Dim codecs As RasterCodecs = New RasterCodecs()
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24)
   image.Dispose()
End Sub
Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also

Reference

ApplyModalityLookupTableCommand Members
Leadtools.ImageProcessing.Core Namespace
Changing Brightness and Contrast
Leadtools.ImageProcessing.Color.RemapIntensityCommand
ApplyLinearModalityLookupTableCommand Class
ApplyVoiLookupTableCommand Class
ApplyLinearVoiLookupTableCommand Class
Leadtools.ImageProcessing.Color.AdjustTintCommand
Leadtools.ImageProcessing.Color.GammaCorrectExtendedCommand

 

 


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