AddCurveToRegion(RasterRegionXForm,RasterCurve,RasterRegionCombineMode) Method

Summary

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

Syntax

C++/CLI

Java

Python

public void AddCurveToRegion( 
   RasterRegionXForm xform, 
   RasterCurve curve, 
   RasterRegionCombineMode combineMode 
)

public void addCurveToRegion( 
  RasterRegionXForm xform,  
  RasterCurve curve,  
  RasterRegionCombineMode combineMode 
)

public: 
void AddCurveToRegion(  
   RasterRegionXForm^ xform, 
   RasterCurve^ curve, 
   RasterRegionCombineMode combineMode 
)

def AddCurveToRegion(self,xform,curve,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.

curve
A RasterCurve object that specifies the curve region. You specify the curve using device context coordinates, and LEADTOOLS translates the coordinates using the values specified in the xform.

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

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
 
 
public void RasterCurveExample() 
{ 
	string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_curveinverted.bmp"); 
 
	// create a new curve object 
	RasterCurve curve = new RasterCurve(); 
 
	// define the curve 
	curve.Points.Add(new LeadPoint(30, 30)); 
	curve.Points.Add(new LeadPoint(30, 200)); 
	curve.Points.Add(new LeadPoint(130, 130)); 
	curve.Points.Add(new LeadPoint(75, 75)); 
	curve.Points.Add(new LeadPoint(130, 30)); 
 
	curve.Type = RasterCurveType.Standard; 
	curve.FillMode = LeadFillMode.Winding; 
	curve.Tension = 0.5; 
	curve.Close = RasterCurveClose.Close; 
 
	// create an image 
 
	using (RasterImage image = new RasterImage( 
	   RasterMemoryFlags.Conventional, 
	   250, 
	   250, 
	   24, 
	   RasterByteOrder.Bgr, 
	   RasterViewPerspective.BottomLeft, 
	   null, 
	   IntPtr.Zero, 
	   0)) 
	{ 
		Assert.IsNotNull(image); 
 
		// fill the image 
		new FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Magenta)).Run(image); 
		image.AddCurveToRegion(null, curve, RasterRegionCombineMode.Set); 
 
		// do something with the region 
		new InvertCommand().Run(image); 
 
		// save the image 
		using (RasterCodecs codecs = new RasterCodecs()) 
		{ 
			// save the image back to disk 
			codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24); 
		} 
	} 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

RasterImage Class

RasterImage Members

Overload List

Download our FREE evaluation

Help Version 22.0.2023.5.16

Leadtools Assembly

Introduction

Getting Started

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies