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ColorHalftoneCommand Class

Summary
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
C#
Objective-C
C++/CLI
Java
Python
public class ColorHalftoneCommand : RasterCommand 
@interface LTColorHalftoneCommand : LTRasterCommand 
public class ColorHalftoneCommand 
    extends RasterCommand 
public ref class ColorHalftoneCommand : public RasterCommand   
class ColorHalftoneCommand(RasterCommand): 
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.

Color Halftone Function - Before

Color Halftone Function - Before

Color Halftone Function - After

Color Halftone Function - After

View additional platform support for this Color Halftone function.

Example

Run the ColorHalftoneCommand on an image.

C#
Java
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Effects; 
 
 
public void ColorHalftoneCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, @"ImageProcessingDemo\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, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
} 
 
import java.io.File; 
import java.io.IOException; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.effects.ColorHalftoneCommand; 
 
 
public void colorHalftoneCommandExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.setThrowExceptionsOnInvalidImages(true); 
 
   RasterImage image = codecs.load(combine(LEAD_VARS_IMAGES_DIR, "cannon.jpg"), 16, 
         CodecsLoadByteOrder.BGR_OR_GRAY, 1, 1); 
 
   // Prepare the command 
   ColorHalftoneCommand command = new ColorHalftoneCommand(); 
   command.setMaximumRadius(15); 
   command.setCyanAngle(10800); 
   command.setMagentaAngle(16200); 
   command.setYellowAngle(9000); 
   command.setBlackAngle(4500); 
 
   int change = command.run(image); 
   assertTrue(change != RasterImageChangedFlags.NONE); 
 
   codecs.save(image, combine(LEAD_VARS_IMAGES_DIR, "Result.jpg"), RasterImageFormat.JPEG, 24); 
   System.out.println("Command run and image saved to " + combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")); 
} 
Requirements

Target Platforms

See Also

Reference

ColorHalftoneCommand Members

Leadtools.ImageProcessing.Effects Namespace

Color Halftone and Halftone Images

Leadtools.ImageProcessing.GrayscaleCommand

Leadtools.ImageProcessing.Color.GrayScaleExtendedCommand

Leadtools.ImageProcessing.Color.AutoColorLevelCommand

Leadtools.ImageProcessing.Color.ColorLevelCommand

Leadtools.ImageProcessing.Color.GrayScaleToDuotoneCommand

Leadtools.ImageProcessing.Color.GrayScaleToMultitoneCommand

RegionHolesRemovalCommand Class

Leadtools.ImageProcessing.Color.SelectiveColorCommand

SkeletonCommand Class

Leadtools.ImageProcessing.Core.HalfToneCommand

Leadtools.ImageProcessing.Color.ColorSeparateCommand

Leadtools.ImageProcessing.Color.ColorMergeCommand

Leadtools.ImageProcessing.Color.DesaturateCommand

Leadtools.ImageProcessing.Core.HalfTonePatternCommand

StatisticsInformationCommand Class

Leadtools.ImageProcessing.Color.HistogramCommand

Leadtools.ImageProcessing.Color.ColorCountCommand

Leadtools.ImageProcessing.Core.MinMaxBitsCommand

Leadtools.ImageProcessing.Core.MinMaxValuesCommand

Leadtools.ImageProcessing.Color.ConvertToColoredGrayCommand

Leadtools.ImageProcessing.Core.ColorizeGrayCommand

Leadtools.ImageProcessing.Core.ShiftDataCommand

Leadtools.ImageProcessing.Core.SelectDataCommand

Leadtools.ImageProcessing.Core.WindowLevelCommand

Leadtools.RasterPalette.WindowLevelFillLookupTable(Leadtools.RasterColor[],Leadtools.RasterColor,Leadtools.RasterColor,System.Int32,System.Int32,System.Int32,System.Int32,System.Int32,System.Int32,System.Int32,Leadtools.RasterPaletteWindowLevelFlags)

Help Version 23.0.2024.3.3
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Leadtools.ImageProcessing.Effects Assembly
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.