HalfToneCommand Constructor(HalfToneCommandType,int,int,RasterImage)

Summary

Initializes a new HalfToneCommand class object with explicit parameters.

Syntax

Objective-C

C++/CLI

Java

Python

public HalfToneCommand( 
   HalfToneCommandType type, 
   int angle, 
   int dimension, 
   RasterImage userDefinedImage 
)

- (instancetype)initWithType:(LTHalfToneCommandType)type angle:(NSInteger)angle dimension:(NSUInteger)dimension userDefinedImage:(nullable LTRasterImage *)userDefinedImage NS_DESIGNATED_INITIALIZER;

public HalfToneCommand( 
   HalfToneCommandType type, 
   int angle, 
   int dimension, 
   RasterImage userDefinedImage 
);

public: 
HalfToneCommand(  
   HalfToneCommandType type, 
   int angle, 
   int dimension, 
   RasterImage^ userDefinedImage 
)

__init__(self,type,angle,dimension,userDefinedImage) # Overloaded constructor

Parameters

type
Value that indicates the type of halftoning to perform.

angle
The angle of rotation, expressed in hundredths of degrees. A value of 0 produces a horizontal halftone pattern. This parameter specifies the number of degrees to change the pattern. Positive values rotate the pattern clockwise; negative values rotate the pattern counterclockwise. This value is ignored if the selected halftone pattern is HalfToneCommandType.Rectangle, HalfToneCommandType.Circle or HalfToneCommandType.Random or HalfToneCommandType.UserDefined.

dimension
Value that indicates the size of the grain. This value is ignored if the selected halftone pattern is HalfToneCommandType.View or HalfToneCommandType.Print. If the pattern is not HalfToneCommandType.View or HalfToneCommandType.Print, dimension should be >= 1. If this parameter is < 1 this command will return ERROR_INV_PARAMETER.

userDefinedImage
List of images that will be used in half toning if the HalfToneCommandType.UserDefined option is selected.

Example

Run the HalfToneCommand on an image.

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void HalfToneConstructorExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "sample5.cmp")); 
 
   // Prepare the command 
   RasterImage[] images = new RasterImage[2]; 
   images[0] = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, @"ImageProcessingDemo\Ulay3.bmp"), 24, CodecsLoadByteOrder.Bgr, 1, 1); 
   images[1] = images[0].Clone(); 
   images[0].AddPage(images[1]); 
   HalfToneCommand command = new HalfToneCommand(HalfToneCommandType.UserDefined, 0, 1, images[0]); 
   // Halftone the image. 
   command.Run(image); 
 
} 
 
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.core.*; 
 
 
public void halfToneConstructorExample() { 
 
    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, "sample5.cmp")); 
 
    // Prepare the command 
    RasterImage[] images = new RasterImage[2]; 
    images[0] = codecs.load(combine(LEAD_VARS_IMAGES_DIR, "Ulay3.bmp"), 24, CodecsLoadByteOrder.BGR, 1, 1); 
    images[1] = images[0].clone(); 
    images[0].addPage(images[1]); 
    HalfToneCommand command = new HalfToneCommand(HalfToneCommandType.USER_DEFINED, 0, 1, images[0]); 
    // Halftone the image 
    command.run(image); 
 
    codecs.save(image, combine(LEAD_VARS_IMAGES_DIR, "Ulay3.jpg"), RasterImageFormat.JPEG, 24); 
    System.out.println("Command run and image saved to " + combine(LEAD_VARS_IMAGES_DIR, "Ulay3.bmp")); 
    assertTrue(new File(combine(LEAD_VARS_IMAGES_DIR, "Ulay3.jpg")).exists()); 
 
}

Requirements

Target Platforms

Reference

HalfToneCommand Class

HalfToneCommand Members

Overload List

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Help Version 23.0.2024.3.3

Leadtools.ImageProcessing.Core Assembly

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