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LEADTOOLS (Leadtools assembly)
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AddRectangleToRegion Method








Leadtools Namespace > RasterImage Class : AddRectangleToRegion Method
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.
A LeadRect that specifies the region.
The action to take regarding the existing image region, if one is defined.
Creates or updates the image region by adding a rectangular region.
Syntax
public void AddRectangleToRegion( 
   RasterRegionXForm xform,
   LeadRect rc,
   RasterRegionCombineMode combineMode
)
'Declaration
 

Public Sub AddRectangleToRegion( _
   ByVal xform As RasterRegionXForm, _
   ByVal rc As LeadRect, _
   ByVal combineMode As RasterRegionCombineMode _
) 
'Usage
 

Dim instance As RasterImage
Dim xform As RasterRegionXForm
Dim rc As LeadRect
Dim combineMode As RasterRegionCombineMode
 
instance.AddRectangleToRegion(xform, rc, combineMode)
public void AddRectangleToRegion( 
   RasterRegionXForm xform,
   LeadRect rc,
   RasterRegionCombineMode combineMode
)
- (BOOL)addRectangleToRegion:(nullable LTRasterRegionXForm *)xform 
                        rect:(LeadRect)rect 
                 combineMode:(LTRasterRegionCombineMode)combineMode 
                       error:(NSError **)error
            
public void addRectangleToRegion(
  RasterRegionXForm xform, 
  LeadRect rc, 
  RasterRegionCombineMode combineMode
)
            
 function Leadtools.RasterImage.AddRectangleToRegion( 
   xform ,
   rc ,
   combineMode 
)

public:
void AddRectangleToRegion( 
   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 specifies the region.
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 loads an image, adds a rectangle region to it, and runs the InvertCommand to show the affected area before saving the image back to disk.

Copy Code   
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Core
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Controls
Imports Leadtools.Dicom
Imports Leadtools.Drawing
Imports Leadtools.Svg

      
Public Sub AddRectangleToRegionExample()
   Dim codecs As RasterCodecs = New RasterCodecs()
   Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")
   Dim destFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_AddRectangleToRegion.bmp")

   ' Load the image
   Dim image As RasterImage = codecs.Load(srcFileName)

   ' Add a rectangle region

   Dim xform As RasterRegionXForm = New RasterRegionXForm()
   xform.ViewPerspective = RasterViewPerspective.TopLeft
   xform.XOffset = 0
   xform.YOffset = 0
   xform.XScalarDenominator = 1
   xform.XScalarNumerator = 1
   xform.YScalarDenominator = 1
   xform.YScalarNumerator = 1

   Dim rc As LeadRect = New LeadRect(image.ImageWidth \ 4, image.ImageHeight \ 4, image.ImageWidth \ 3, image.ImageHeight \ 3)
   image.AddRectangleToRegion(xform, rc, RasterRegionCombineMode.Set)

   ' Draw something on the image
   Dim command As InvertCommand = New InvertCommand()
   command.Run(image)

   ' Save the image
   codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24)

   image.Dispose()
   codecs.Dispose()
End Sub

Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
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 AddRectangleToRegionExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string srcFileName = Path.Combine(ImagesPath.Path, "Image1.cmp");
   string destFileName = Path.Combine(ImagesPath.Path, "Image1_AddRectangleToRegion.bmp");

   // Load the image
   RasterImage image = codecs.Load(srcFileName);

   // Add a rectangle 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.AddRectangleToRegion(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();
}
RasterImageExamples.prototype.AddRectangleToRegionExample = function ( )
{
   Tools.SetLicense ( );
   with ( Leadtools ) 
   {
      with ( Leadtools.Codecs )
      {
         var codecs = new RasterCodecs();

         var srcFileName = "Assets\\Image1.cmp";
         var destFileName = "Image1_AddRectangleToRegion.bmp";
         var image ;
         // Load the image
         return Tools.AppInstallFolder().getFileAsync(srcFileName).then(function (loadFile) {
            return codecs.loadAsync(LeadStreamFactory.create(loadFile))
         })
            .then(function (img) {
               image = img;

               // Add a rectangle region

               var 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;

               var rc = LeadRectHelper.create(image.imageWidth / 4, image.imageHeight / 4, image.imageWidth / 3, image.imageHeight / 3);
               image.addRectangleToRegion(xform, rc, RasterRegionCombineMode.set);

               // Draw something on the image
               var command = new Leadtools.ImageProcessing.Color.InvertCommand();
               command.run(image);

               // Save the image
               return Tools.AppLocalFolder().createFileAsync(destFileName)
            })
            .then(function (saveFile) {
               var saveStream = LeadStreamFactory.create(saveFile);
               return codecs.saveAsync(image, saveStream, RasterImageFormat.bmp, 24)
            })
            .then(function () {

               image.close();
               codecs.close();
            });
      }
   }
}
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.Dicom;

      
public async Task AddRectangleToRegionExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string srcFileName = @"Assets\Image1.cmp";
   string destFileName = @"Image1_AddRectangleToRegion.bmp";

   // Load the image
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

   // Add a rectangle 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 = LeadRectHelper.Create(image.ImageWidth / 4, image.ImageHeight / 4, image.ImageWidth / 3, image.ImageHeight / 3);
   image.AddRectangleToRegion(xform, rc, RasterRegionCombineMode.Set);

   // Draw something on the image
   InvertCommand command = new InvertCommand();
   command.Run(image);

   // Save the image
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName);
   ILeadStream saveStream = LeadStreamFactory.Create(saveFile);
   await codecs.SaveAsync(image, saveStream, RasterImageFormat.Bmp, 24);

   image.Dispose();
   codecs.Dispose();
}
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Dicom;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.Examples;
using Leadtools.Windows.Media;

public void AddRectangleToRegionExample(RasterImage image, Stream destStream)
{
   // Add a rectangle 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.AddRectangleToRegion(xform, rc, RasterRegionCombineMode.Set);

   // Draw something on the image
   InvertCommand command = new InvertCommand();
   command.Run(image);

   // Save the image
   RasterCodecs codecs = new RasterCodecs();
   codecs.Save(image, destStream, RasterImageFormat.Png, 0);

   image.Dispose();
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Dicom
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Core
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Windows.Media

Public Sub AddRectangleToRegionExample(ByVal image As RasterImage, ByVal destStream As Stream)
   ' Add a rectangle region
   Dim xform As RasterRegionXForm = New RasterRegionXForm()
   xform.ViewPerspective = RasterViewPerspective.TopLeft
   xform.XOffset = 0
   xform.YOffset = 0
   xform.XScalarDenominator = 1
   xform.XScalarNumerator = 1
   xform.YScalarDenominator = 1
   xform.YScalarNumerator = 1

   Dim rc As LeadRect = New LeadRect(image.ImageWidth / 4, image.ImageHeight / 4, image.ImageWidth / 3, image.ImageHeight / 3)
   image.AddRectangleToRegion(xform, rc, RasterRegionCombineMode.Set)

   ' Draw something on the image
   Dim command As InvertCommand = New InvertCommand()
   command.Run(image)

   ' Save the image
   Dim codecs As RasterCodecs = New RasterCodecs()
   codecs.Save(image, destStream, RasterImageFormat.Png, 0)

   image.Dispose()
End Sub
Requirements

Target Platforms

See Also

Reference

RasterImage Class
RasterImage Members

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