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HalfToneCommand Class
See Also  Members   Example 
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.

Syntax

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

Example

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

      Dim leadImage As RasterImage = codecs.Load("C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\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

      RasterCodecs.Shutdown()
   End Sub
C#Copy Code
ImageProcessing.Core.HalfToneCommand 
      public void HalfToneCommandExample() 
      { 
         // Load an image 
         RasterCodecs.Startup(); 
         RasterCodecs codecs = new RasterCodecs(); 
         codecs.ThrowExceptionsOnInvalidImages = true; 
 
         RasterImage image = codecs.Load(@"C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\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); 
 
         RasterCodecs.Shutdown(); 
      }

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 Processing an Image.

Inheritance Hierarchy

System.Object
   Leadtools.ImageProcessing.RasterCommand
      Leadtools.ImageProcessing.Core.HalfToneCommand

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