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HalfTonePatternCommand Class

Summary

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

WinRT C#

C++

public class HalfTonePatternCommand : RasterCommand

Public Class HalfTonePatternCommand  
   Inherits Leadtools.Imageprocessing.Leadtools.ImageProcessing.RasterCommand 
   Implements Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand

public sealed class HalfTonePatternCommand : Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand

function Leadtools.ImageProcessing.Core.HalfTonePatternCommand()

public ref class HalfTonePatternCommand : public Leadtools.Imageprocessing.Leadtools.ImageProcessing.RasterCommand, Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand

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.

Example

Run the HalfTonePatternCommand on an image.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void HalfTonePatternCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "sample1.cmp")); 
 
   // 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); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
      Leadtools.Examples.Support.SetLicense() 
 
Public Sub HalfTonePatternCommandExample() 
   Dim codecs As New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "sample1.cmp")) 
 
   ' 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) 
 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class