AddEllipseToRegion Method (original) (raw)
Summary
Creates or updates the image region by adding an elliptical region.
Syntax
C#
Objective-C
C++/CLI
Java
Python
- (BOOL)addEllipseToRegion:(nullable LTRasterRegionXForm *)_xform_
rect:(LeadRect)rect
combineMode:(LTRasterRegionCombineMode)_combineMode_
error:(NSError **)error
public void addEllipseToRegion(
RasterRegionXForm _xform_,
LeadRect _rc_,
RasterRegionCombineMode _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.
rc
A LeadRect that represents the bounding rectangle that defines the ellipse.
combineMode
The action to take regarding the existing image region, if one is defined.
Example
This example will load an image, adds an elliptical region to it, run the InvertCommand to show the affected area before saving the image back to disk.
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 AddEllipseToRegionExample()
{
RasterCodecs codecs = new RasterCodecs();
string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_AddEllipseToRegion.bmp");
// Load the image
RasterImage image = codecs.Load(srcFileName);
// Add an elliptical 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;
LeadRect rc = new LeadRect(image.ImageWidth / 4, image.ImageHeight / 4, image.ImageWidth / 3, image.ImageHeight / 3);
image.AddEllipseToRegion(xform, rc, 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:\LEADTOOLS22\Resources\Images";
}
Leadtools Assembly