RasterRegionXForm Constructor

Summary

Initializes a new instance of the RasterRegionXForm class with default values.

Syntax

Objective-C

C++/CLI

Java

Python

public RasterRegionXForm()

- (instancetype)init

public RasterRegionXForm()

public: 
RasterRegionXForm();

__init__() # Default constructor

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
 
 
public void RasterRegionTransformExample() 
{ 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
   string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_TransformRegion.bmp"); 
   using (RasterCodecs codecs = new RasterCodecs()) 
   { 
      // Load the source image 
      using (RasterImage image = codecs.Load(srcFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1)) 
      { 
         // Add a large elliptical region  
         image.AddEllipseToRegion(null, new LeadRect(0, 0, image.ImageWidth, image.ImageHeight), RasterRegionCombineMode.Set); 
 
         // Fill the image with yellow 
         FillCommand cmd = new FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Yellow)); 
         cmd.Run(image); 
 
         // Get the region 
         using (RasterRegion region = image.GetRegion(null)) 
         { 
            // Transform this region by making it twice as small 
            LeadRect bounds = region.GetBounds(); 
 
            RasterRegionXForm xform = RasterRegionXForm.Default; 
 
            xform.XScalarNumerator = 1; 
            xform.XScalarDenominator = 2; 
            xform.YScalarNumerator = 1; 
            xform.YScalarDenominator = 2; 
 
            xform.XOffset = bounds.Width / 2; 
            xform.YOffset = bounds.Height / 2; 
 
            region.Transform(xform); 
 
            // Re-set this region into the image 
            image.SetRegion(null, region, RasterRegionCombineMode.Set); 
         } 
 
         // Now fill with red and save 
         cmd = new FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Red)); 
         cmd.Run(image); 
 
         codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24); 
      } 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import static org.junit.Assert.assertTrue; 
 
import java.io.File; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.nio.file.Files; 
import java.nio.file.Paths; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.FillCommand; 
 
 
public void rasterRegionTransformExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1.cmp"); 
   String destFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1_TransformRegion.bmp"); 
   RasterCodecs codecs = new RasterCodecs(); 
 
   // Load the source image 
   RasterImage image = codecs.load(srcFileName, 0, CodecsLoadByteOrder.BGR_OR_GRAY, 1, 1); 
 
   // Add a large elliptical region 
   image.addEllipseToRegion(null, new LeadRect(0, 0, image.getImageWidth(), image.getImageHeight()), 
         RasterRegionCombineMode.SET); 
 
   // Fill the image with yellow 
   FillCommand cmd = new FillCommand(RasterColor.fromKnownColor(RasterKnownColor.YELLOW)); 
   cmd.run(image); 
 
   // Get the region 
   RasterRegion region = image.getRegion(null); 
 
   // Transform this region by making it twice as small 
   LeadRect bounds = region.getBounds(); 
   RasterRegionXForm xform = RasterRegionXForm.Default(); 
   xform.setXScalarNumerator(1); 
   xform.setXScalarDenominator(2); 
   xform.setYScalarNumerator(1); 
   xform.setYScalarDenominator(2); 
   xform.setXOffset(bounds.getWidth() / 2); 
   xform.setYOffset(bounds.getHeight() / 2); 
   region.transform(xform); 
 
   // Re-set this region into the image 
   image.setRegion(null, region, RasterRegionCombineMode.SET); 
 
   // Now fill with red and save 
   cmd = new FillCommand(RasterColor.fromKnownColor(RasterKnownColor.RED)); 
   cmd.run(image); 
 
   codecs.save(image, destFileName, RasterImageFormat.BMP, 24); 
 
   assertTrue("Image unsuccessfully saved", (new File(destFileName)).exists()); 
   System.out.println("Command run and image saved to " + destFileName); 
}

Requirements

Target Platforms

Reference

RasterRegionXForm Class

RasterRegionXForm Members

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Help Version 23.0.2024.5.22

Leadtools Assembly

Introduction

Getting Started

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Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies