XScalarNumerator Property

Summary

The numerator for the X scaling factor.

Syntax

Objective-C

C++/CLI

Java

Python

public int XScalarNumerator { get; set; }

@property (nonatomic, assign) NSInteger xScalarNumerator

public int getXScalarNumerator(); 
public void setXScalarNumerator( 
   int intValue 
);

public: 
property int XScalarNumerator { 
   int get(); 
   void set (    int ); 
}

XScalarNumerator # get and set (RasterRegionXForm)

Property Value

The numerator for the X scaling factor.

Remarks

When translating information from the image, you can use the width of the painting method destination rectangle for this value.

Methods that translate in this direction are PaintRegion and GetRegionBounds.

When translating information to the image, you can use the width of the painting method source rectangle for this value. (By default, it is the image width.)

Methods that translate in this direction include:

For more information, refer to Translating Coordinates for a Region.

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

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies