AddCurveToRegion(RasterRegionXForm,LeadPoint[],float,LeadFillMode,RasterRegionCombineMode) Method

Summary

Creates or updates the image region by adding a curved region.

Syntax

C++/CLI

Java

Python

public void AddCurveToRegion( 
   RasterRegionXForm xform, 
   LeadPoint[] pts, 
   float tension, 
   LeadFillMode fillMode, 
   RasterRegionCombineMode combineMode 
)

public void addCurveToRegion( 
  RasterRegionXForm xform,  
  LeadPoint[] pts,  
  float tension,  
  Path.FillType fillMode,  
  RasterRegionCombineMode combineMode 
)

public: 
void AddCurveToRegion(  
   RasterRegionXForm^ xform, 
   array<LeadPoint>^ pts, 
   float tension, 
   LeadFillMode fillMode, 
   RasterRegionCombineMode combineMode 
)

def AddCurveToRegion(self,xform,] pts,tension,fillMode,combineMode):

Parameters

xform
RasterRegionXForm object that LEADTOOLS uses to translate between display coordinates and image coordinates. If you specify null in this parameter, the scalar fields default to 1, the offsets default to 0, and the view perspective defaults to the image view perspective.

pts
Array of LeadPoint objects. The points in the array must be in the order in which the vertices of the polygon are connected. To create the line that closes the polygon, the last point in the array is connected to the first point of the array.

tension
A value that specifies the amount that the curve bends between control points. Values greater than 1 produce unpredictable results.

fillMode
Indicates how to handle complex crossing lines.

Value	Meaning
LeadFillMode.Winding	All pixels that are inside the resulting exterior lines are in the region.
LeadFillMode.Alternate	The region includes the area between odd-numbered and even-numbered polygon sides on each scan line.

combineMode
The action to take regarding the existing image region, if one is defined.

Remarks

To update an existing region, you specify how the new region is to be combined with the existing one using the combineMode parameter. For more information, refer to RasterRegionCombineMode.

For more information, refer to Creating a Region.

For more information, refer to Saving A Region.

For more information, refer to Working with the Existing Region.

Example

This example will load an image, adds a curve region to it, run the InvertCommand to show the affected area before saving the image back to disk.

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Core; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Dicom; 
using Leadtools.Drawing; 
using Leadtools.Controls; 
using Leadtools.Svg; 
 
 
public void AddCurveToRegionExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
   string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_AddCurveToRegion.bmp"); 
 
   // Load the image 
   RasterImage image = codecs.Load(srcFileName); 
 
   // Add a curve region 
 
   RasterRegionXForm xform = new RasterRegionXForm(); 
   xform.ViewPerspective = RasterViewPerspective.TopLeft; 
   xform.XOffset = 0; 
   xform.YOffset = 0; 
   xform.XScalarDenominator = 1; 
   xform.XScalarNumerator = 1; 
   xform.YScalarDenominator = 1; 
   xform.YScalarNumerator = 1; 
 
   LeadPoint[] pts = 
   { 
   new LeadPoint(30, 30), 
   new LeadPoint(30, 200), 
   new LeadPoint(130, 130), 
   new LeadPoint(75, 75), 
   new LeadPoint(130, 30) 
 }; 
 
   image.AddCurveToRegion(xform, pts, 0.5f, LeadFillMode.Winding, RasterRegionCombineMode.Set); 
 
   // Draw something on the image 
   InvertCommand command = new InvertCommand(); 
   command.Run(image); 
 
   // Save the image 
   codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24); 
 
   image.Dispose(); 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.FileInputStream; 
import java.io.IOException; 
import java.io.InputStream; 
import java.util.ArrayList; 
import java.util.List; 
 
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.*; 
import leadtools.svg.*; 
import leadtools.imageprocessing.CloneCommand; 
import leadtools.imageprocessing.FillCommand; 
import leadtools.imageprocessing.FlipCommand; 
import leadtools.imageprocessing.GrayscaleCommand; 
import leadtools.imageprocessing.color.InvertCommand; 
import leadtools.imageprocessing.color.PosterizeCommand; 
 
 
// // public void addCurveToRegionExample(){ 
 
// final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
// RasterCodecs codecs = new RasterCodecs(); 
 
// String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1.cmp"); 
// String destFileName = combine(LEAD_VARS_IMAGES_DIR, 
// "Image1_AddCurveToRegion.bmp"); 
 
// // Load the image 
// RasterImage image = codecs.load(srcFileName); 
 
// // Add a curve region 
 
// RasterRegionXForm xform = new RasterRegionXForm(); 
// xform.setRasterViewPerspective(RasterViewPerspective.TOP_LEFT); 
// xform.setXOffset(0); 
// assertTrue(xform.getXOffset() == 0); 
// xform.setYOffset(0); 
// xform.setXScalarDenominator(1); 
// xform.setXScalarNumerator(1); 
// xform.setYScalarDenominator(1); 
// xform.setYScalarNumerator(1); 
 
// LeadPoint[] pts = {new LeadPoint(30, 30), new LeadPoint(30, 200), new 
// LeadPoint(130, 130), new LeadPoint(75, 75), new LeadPoint(130, 30)}; 
 
// image.addCurveToRegion(xform, pts, 0.5f, LeadFillMode.WINDING, 
// RasterRegionCombineMode.SET); 
 
// // Draw something on the image 
// InvertCommand command = new InvertCommand(); 
// command.run(image); 
 
// // Save the image 
// codecs.save(image, destFileName, RasterImageFormat.BMP, 24); 
 
// assertTrue("file unsuccessfully saved to " + destFileName, (new 
// File(destFileName)).exists()); 
// System.out.printf("File saved successfully to %s%n", destFileName); 
 
// image.dispose(); 
// codecs.dispose(); 
 
// }

Requirements

Target Platforms

Reference

RasterImage Class

RasterImage Members

Overload List

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Help Version 23.0.2024.5.22

Leadtools Assembly

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Getting Started

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Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies