Leadtools.ImageProcessing.Effects Send comments on this topic. | Back to Introduction - All Topics | Help Version 15.12.10
ColorHalftoneCommand Class
See Also  Members   Example 
Leadtools.ImageProcessing.Effects Namespace : ColorHalftoneCommand Class




Shows the effect of using an enlarged halftone screen on each image channel. The filter divides the image into rectangles and replaces each rectangle with circles. Each channel has a separate grid of circles, and has its own angle setting. The size of each circle is proportional to the brightness of the rectangle that it is replacing. This method is available in the Document/Medical toolkits.

Syntax

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

Example

Visual BasicCopy Code
ImageProcessing.Effects.ColorHalftoneCommand
   Public Sub ColorHalftoneCommandExample()
      RasterCodecs.Startup()
      Dim codecs As New RasterCodecs()
      codecs.ThrowExceptionsOnInvalidImages = True

      Dim leadImage As RasterImage = codecs.Load("C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\Beauty16.jpg", 16, CodecsLoadByteOrder.BgrOrGray, 1, 1)

      ' Prepare the command
      Dim command As New ColorHalftoneCommand
      command.MaximumRadius = 15
      command.CyanAngle = 10800
      command.MagentaAngle = 16200
      command.YellowAngle = 9000
      command.BlackAngle = 4500
      command.Run(leadImage)
      codecs.Save(leadImage, "C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\Result.jpg", RasterImageFormat.Jpeg, 24)

      RasterCodecs.Shutdown()
   End Sub
C#Copy Code
ImageProcessing.Effects.ColorHalftoneCommand 
      public void ColorHalftoneCommandExample() 
      { 
         // Load an image 
         RasterCodecs.Startup(); 
         RasterCodecs codecs = new RasterCodecs(); 
         codecs.ThrowExceptionsOnInvalidImages = true; 
 
         RasterImage image = codecs.Load(@"C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\Beauty16.jpg",16,CodecsLoadByteOrder.BgrOrGray,1,1); 
 
 
         // Prepare the command 
         ColorHalftoneCommand command  = new ColorHalftoneCommand(); 
         command.MaximumRadius = 15; 
         command.CyanAngle = 10800; 
         command.MagentaAngle = 16200; 
         command.YellowAngle = 9000; 
         command.BlackAngle = 4500; 
         command.Run(image); 
         codecs.Save(image, @"C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\Result.jpg", RasterImageFormat.Jpeg, 24); 
 
         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.Effects.ColorHalftoneCommand

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