ConvertSignedToUnsignedCommand Class

Summary

Converts a signed image to unsigned.

Syntax

Objective-C

C++/CLI

Java

Python

public class ConvertSignedToUnsignedCommand : RasterCommand

@interface LTConvertSignedToUnsignedCommand : LTRasterCommand

public class ConvertSignedToUnsignedCommand 
    extends RasterCommand

public ref class ConvertSignedToUnsignedCommand : public RasterCommand

class ConvertSignedToUnsignedCommand(RasterCommand):

Remarks

The image may contain negative pixel values and LEADTOOLS will paint/process the image incorrectly. To use this image correctly the negative pixels should be converted, if it contains negative pixels (if Signed is True).
If the Signed is set to True, this method will shift the color values in the image according to Type property.
The method will also update the MinValue and MaxValue properties of the RasterImage.
.
This method supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
This command does not support 32-bit grayscale images.

For more information, refer to Introduction to Image Processing With LEADTOOLS.

Example

Run the ConvertSignedToUnsignedCommand on an image. The passed image must be signed image.

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void ConvertSignedToUnsignedCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE2.dcm")); 
 
   // Prepare the command 
   ConvertSignedToUnsignedCommand command = new ConvertSignedToUnsignedCommand(); 
   command.Type = ConvertSignedToUnsignedCommandType.ShiftNegativeToZero; 
   //convert image to unsigned. 
   command.Run(image); 
 
} 
 
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 convertSignedToUnsignedCommandExample() { 
 
    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\\IMAGE2.dcm")); 
 
    // Prepare the command 
    ConvertSignedToUnsignedCommand command = new ConvertSignedToUnsignedCommand(); 
    command.setType(ConvertSignedToUnsignedCommandType.SHIFT_NEGATIVE_TO_ZERO); 
 
    // Convert image to unsigned 
    command.run(image); 
    codecs.save(image, combine(LEAD_VARS_IMAGES_DIR, "Result.jpg"), RasterImageFormat.JPEG, 24); 
 
    assertTrue(new File(combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")).exists()); 
    System.out.println("Command run and image saved to " + combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")); 
 
}

Requirements

Target Platforms

Reference

ConvertSignedToUnsignedCommand Members

Leadtools.ImageProcessing.Core Namespace

Introduction to Image Processing With LEADTOOLS

Leadtools.ImageProcessing.ClearNegativePixelsCommand

ConvertUnsignedToSignedCommand Class

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Help Version 23.0.2024.3.3

Leadtools.ImageProcessing.Core Assembly

Introduction

Getting Started

Namespaces

Leadtools.ImageProcessing.Core Namespace

Assemblies