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ConvertSignedToUnsignedCommand Class
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Leadtools.ImageProcessing.Core Namespace : ConvertSignedToUnsignedCommand Class



Converts a signed image to unsigned.

Syntax

Visual Basic (Declaration) 
Public Class ConvertSignedToUnsignedCommand 
   Inherits RasterCommand
   Implements IRasterCommand 
Visual Basic (Usage)Copy Code
Dim instance As ConvertSignedToUnsignedCommand
C# 
public class ConvertSignedToUnsignedCommand : RasterCommand, IRasterCommand 
C++/CLI 
public ref class ConvertSignedToUnsignedCommand : public RasterCommand, IRasterCommand 

Example

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

Visual BasicCopy Code
Public Sub ConvertSignedToUnsignedCommandExample()
   RasterCodecs.Startup()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True

   Dim leadImage As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "IMAGE2.dic")

   ' Prepare the command
   Dim command As ConvertSignedToUnsignedCommand = New ConvertSignedToUnsignedCommand
   command.Type = ConvertSignedToUnsignedCommandType.ShiftNegativeToZero
   'convert image to unsigned.
   command.Run(leadImage)

   RasterCodecs.Shutdown()
End Sub
C#Copy Code
public void ConvertSignedToUnsignedCommandExample() 
{ 
   // Load an image 
   RasterCodecs.Startup(); 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "IMAGE2.dic"); 
 
   // Prepare the command 
   ConvertSignedToUnsignedCommand command = new ConvertSignedToUnsignedCommand(); 
   command.Type   = ConvertSignedToUnsignedCommandType.ShiftNegativeToZero; 
   //convert image to unsigned. 
   command.Run(image); 
 
   RasterCodecs.Shutdown(); 
}

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.

Inheritance Hierarchy

System.Object
   Leadtools.ImageProcessing.RasterCommand
      Leadtools.ImageProcessing.Core.ConvertSignedToUnsignedCommand

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also