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HalfToneCommand Class
See Also  Members  
Leadtools.ImageProcessing.Core Namespace : HalfToneCommand Class



Converts a 1-, 4-, 8-, 16-, 24-, or 32-bit image to a halftoned image, with a specified pattern rotation. A halftoned image is a 1-bit image that has been dithered for black and white printing or display. Supported in Silverlight, Windows Phone 7

Object Model

HalfToneCommand Class

Syntax

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

Example

Run the HalfToneCommand on an image.

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

   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"))

   ' Prepare the command
   Try
      Dim command As HalfToneCommand = New HalfToneCommand
      command.Angle = 0
      command.Dimension = 2
      command.Type = HalfToneCommandType.View
      'Halftone the image.
      command.Run(leadImage)
   Catch ex As Exception
      MessageBox.Show(ex.Message, "HalfToneTest", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
   End Try

End Sub

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

      RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"));

      // Prepare the command
      HalfToneCommand command = new HalfToneCommand();
      command.Angle = 0;
      command.Dimension = 2;
      command.Type = HalfToneCommandType.View;
      //Halftone the image.
      command.Run(image);

   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}
SilverlightCSharpCopy Code
SilverlightVBCopy Code

Remarks

  • For the HalfToneCommandType.UserDefined option, the number of images in the list must be at least equal to (Dimension * Dimension + 1). Images with higher indexes correspond to higher intensity values.
  • This command can process the whole image or a region of the image.
  • This command does not support 12 and 16-bit grayscale and 48 and 64-bit color images.
  • This command does not support signed data images.
  • This command supports 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.HalfToneCommand

Requirements

Target Platforms: Silverlight 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)

See Also