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PosterizeCommand Class

Summary
Imposes a poster effect on an image by quantizing the image's colors to a specified number of color levels per plane. For example, two levels means two of red, two of green, and two of blue.
Syntax
C#
Objective-C
C++/CLI
Java
Python
public class PosterizeCommand : RasterCommand 
@interface LTPosterizeCommand : LTRasterCommand 
public class PosterizeCommand 
    extends RasterCommand 
public ref class PosterizeCommand : public RasterCommand   
class PosterizeCommand(RasterCommand):
Remarks
  • This command 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.
  • This command does not support 32-bit grayscale images.

If the image has a LUT and you want to work on the image data, set RasterImage.UseLookupTable to false. Then, after calling the method, reset the UselookupTable property to true, as follows: 

rasterImage.UseLookupTable = false; 
Method(rasterImage); 
rasterImage.UseLookupTable = true;

For more information, refer to Applying Artistic Effects.

Posterize Function - Before

Posterize Function - Before

Posterize Function - After

Posterize Function - After

View additional platform support for this Posterize function.

Example

Run the PosterizeCommand on an image and posterize it.

C#
Java
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Color; 
 
 
public void PosterizeCommandCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1.CMP")); 
 
   // Prepare the command 
   PosterizeCommand command = new PosterizeCommand(); 
   //Apply a poster effect with twelve color levels per plane. 
   command.Levels = 12; 
   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.assertTrue; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.color.PosterizeCommand; 
 
 
public void posterizeCommandCommandExample() { 
 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   final String OUTPUT_FILE_PATH = combine(LEAD_VARS_IMAGES_DIR, "Result.jpg"); 
 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.setThrowExceptionsOnInvalidImages(true); 
 
   RasterImage image = codecs.load(combine(LEAD_VARS_IMAGES_DIR, "IMAGE1.CMP")); 
 
   // Prepare the command 
   PosterizeCommand command = new PosterizeCommand(); 
   // Apply a poster effect with twelve color levels per plane. 
   command.setLevels(12); 
   command.run(image); 
   codecs.save(image, OUTPUT_FILE_PATH, RasterImageFormat.JPEG, 0); 
 
   System.out.println("Command run and image saved to " + OUTPUT_FILE_PATH); 
   assertTrue(new File(OUTPUT_FILE_PATH).exists()); 
 
}
Requirements

Target Platforms

See Also

Reference

PosterizeCommand Members

Leadtools.ImageProcessing.Color Namespace

Applying Artistic Effects

Leadtools.ImageProcessing.Effects.SharpenCommand

Leadtools.ImageProcessing.Effects.MosaicCommand

Leadtools.ImageProcessing.Effects.EmbossCommand

Leadtools.ImageProcessing.Effects.AverageCommand

Leadtools.ImageProcessing.Core.MedianCommand

Leadtools.ImageProcessing.Effects.AddNoiseCommand

IntensityDetectCommand Class

Leadtools.ImageProcessing.Effects.SpatialFilterCommand

Leadtools.ImageProcessing.Effects.BinaryFilterCommand

Leadtools.ImageProcessing.Core.MaximumCommand

Leadtools.ImageProcessing.Core.MinimumCommand

Leadtools.ImageProcessing.Effects.OilifyCommand

SolarizeCommand Class

Leadtools.ImageProcessing.Core.WindowLevelCommand

Leadtools.ImageProcessing.SpecialEffects.BumpMapCommand

Leadtools.ImageProcessing.Effects.CubismCommand

Leadtools.ImageProcessing.SpecialEffects.DrawStarCommand

Leadtools.ImageProcessing.SpecialEffects.DryCommand

Leadtools.ImageProcessing.SpecialEffects.FreePlaneBendCommand

Leadtools.ImageProcessing.SpecialEffects.FreeRadialBendCommand

Leadtools.ImageProcessing.SpecialEffects.GlassEffectCommand

Leadtools.ImageProcessing.SpecialEffects.GlowCommand

Leadtools.ImageProcessing.SpecialEffects.LensFlareCommand

Leadtools.ImageProcessing.SpecialEffects.LightCommand

Leadtools.ImageProcessing.SpecialEffects.OceanCommand

Leadtools.ImageProcessing.SpecialEffects.PlaneBendCommand

Leadtools.ImageProcessing.SpecialEffects.PlaneCommand

SampleTargetCommand Class

Leadtools.ImageProcessing.SpecialEffects.TunnelCommand

Leadtools.ImageProcessing.SpecialEffects.BendCommand

Leadtools.ImageProcessing.SpecialEffects.CylinderCommand

Leadtools.ImageProcessing.SpecialEffects.FreeHandShearCommand

Leadtools.ImageProcessing.SpecialEffects.FreeHandWaveCommand

Leadtools.ImageProcessing.SpecialEffects.ImpressionistCommand

Leadtools.ImageProcessing.SpecialEffects.PixelateCommand

Leadtools.ImageProcessing.SpecialEffects.PolarCommand

Leadtools.ImageProcessing.SpecialEffects.PunchCommand

Leadtools.ImageProcessing.SpecialEffects.RadialBlurCommand

Leadtools.ImageProcessing.SpecialEffects.RadialWaveCommand

Leadtools.ImageProcessing.SpecialEffects.RippleCommand

Leadtools.ImageProcessing.SpecialEffects.SphereCommand

Leadtools.ImageProcessing.SpecialEffects.SwirlCommand

Leadtools.ImageProcessing.SpecialEffects.WaveCommand

Leadtools.ImageProcessing.SpecialEffects.WindCommand

Leadtools.ImageProcessing.SpecialEffects.ZoomBlurCommand

Leadtools.ImageProcessing.SpecialEffects.ZoomWaveCommand

Leadtools.ImageProcessing.SpecialEffects.ShadowCommand

Leadtools.ImageProcessing.SpecialEffects.RevEffectCommand

Leadtools.ImageProcessing.SpecialEffects.AgingCommand

Leadtools.ImageProcessing.SpecialEffects.DiceEffectCommand

Leadtools.ImageProcessing.SpecialEffects.FunctionalLightCommand

Leadtools.ImageProcessing.SpecialEffects.PuzzleEffectCommand

Leadtools.ImageProcessing.SpecialEffects.RingEffectCommand

Leadtools.ImageProcessing.SpecialEffects.RadialBlurCommand

Leadtools.ImageProcessing.SpecialEffects.BricksTextureCommand

Leadtools.ImageProcessing.Core.DeskewCommand

Leadtools.ImageProcessing.SpecialEffects.DiffuseGlowCommand

Leadtools.ImageProcessing.SpecialEffects.GlowCommand

Leadtools.ImageProcessing.Core.HalfTonePatternCommand

Leadtools.ImageProcessing.Effects.HighPassCommand

Leadtools.ImageProcessing.Effects.MaskConvolutionCommand

Leadtools.ImageProcessing.SpecialEffects.PerspectiveCommand

Leadtools.ImageProcessing.SpecialEffects.PlasmaCommand

Leadtools.ImageProcessing.SpecialEffects.PointillistCommand

Leadtools.ImageProcessing.SpecialEffects.CanvasCommand

Leadtools.ImageProcessing.SpecialEffects.CloudsCommand

Leadtools.ImageProcessing.SpecialEffects.ColoredBallsCommand

Leadtools.ImageProcessing.SpecialEffects.DiffuseGlowCommand

Leadtools.ImageProcessing.Effects.DisplacementCommand

Leadtools.ImageProcessing.SpecialEffects.FragmentCommand

Leadtools.ImageProcessing.SpecialEffects.MosaicTilesCommand

Leadtools.ImageProcessing.Effects.OffsetCommand

Leadtools.ImageProcessing.SpecialEffects.RomanMosaicCommand

Leadtools.ImageProcessing.SpecialEffects.VignetteCommand

Leadtools.ImageProcessing.SpecialEffects.ZigZagCommand

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