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HalfTonePatternCommand Class
See Also  Members   Example 
Leadtools.ImageProcessing.Core Namespace : HalfTonePatternCommand Class



Creates a halftone screen effect for an image while keeping its continuous range of tones. This method is available in the Document/Medical toolkits.

Syntax

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

Example

Run the HalfTonePatternCommand on an image.

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

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

   ' Prepare the command
   Dim command As New HalfTonePatternCommand
   command.Contrast = 100
   command.Ripple = 200
   command.AngleContrast = 12
   command.AngleRipple = 2
   command.AngleOffset = 4500
   command.BackGroundColor = New RasterColor(255, 255, 255)
   command.ForeGroundColor = New RasterColor(255, 0, 0)
   command.Type = HalfTonePatternCommandType.Line
   command.Run(leadImage)

   RasterCodecs.Shutdown()
End Sub
C#Copy Code
public void HalfTonePatternCommandExample() 
{ 
   // Load an image 
   RasterCodecs.Startup(); 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Master.jpg"); 
 
   // Prepare the command 
   HalfTonePatternCommand command  = new HalfTonePatternCommand(); 
   command.Contrast = 100; 
   command.Ripple = 200; 
   command.AngleContrast = 12; 
   command.AngleRipple = 2; 
   command.AngleOffset = 4500; 
   command.BackGroundColor = new RasterColor(255, 255, 255); 
   command.ForeGroundColor = new RasterColor(255, 0,0); 
   command.Type = HalfTonePatternCommandType.Line; 
   command.Run(image); 
 
   RasterCodecs.Shutdown(); 
}

Remarks

  • 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.
  • If the image has a region, this method works only on the region. If the image does not have a region, this method works on the entire image.
  • This method does not support signed data images.
  • This command does not support 32-bit grayscale images.

Inheritance Hierarchy

System.Object
   Leadtools.ImageProcessing.RasterCommand
      Leadtools.ImageProcessing.Core.HalfTonePatternCommand

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