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++/CLI

Java

Python

public class GetLinearVoiLookupTableCommand : RasterCommand

@interface LTGetLinearVoiLookupTableCommand : LTRasterCommand

public class GetLinearVoiLookupTableCommand 
    extends RasterCommand

public ref class GetLinearVoiLookupTableCommand : public RasterCommand

class GetLinearVoiLookupTableCommand(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.

Java

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:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.IOException; 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.core.*; 
 
 
public void getLinearVoiLookupTableCommandExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.setThrowExceptionsOnInvalidImages(true); 
 
   RasterImage image = codecs.load(combine(LEAD_VARS_IMAGES_DIR, "DICOM\\IMAGE3.dcm")); 
 
   // Prepare the command 
   GetLinearVoiLookupTableCommand command = new GetLinearVoiLookupTableCommand(); 
   command.setFlags(GetLinearVoiLookupTableCommandFlags.NONE.getValue()); 
   command.run(image); 
 
   assertTrue(new File(combine(LEAD_VARS_IMAGES_DIR, "DICOM\\IMAGE3.dcm")).exists()); 
 
   System.out.println("Width  = " + command.getWidth() + "\n" + "Center = " + command.getCenter()); 
}