CalculateRegionArea Method

C#
Visual Basic
WinRT C#
Objective-C
Java
WinRT JavaScript
C++

public long CalculateRegionArea()

'Declaration
 
Public Function CalculateRegionArea() As Long

'Usage
 
Dim instance As RasterImage
Dim value As Long
 
value = instance.CalculateRegionArea()

public long CalculateRegionArea()

-(size_t)calculateRegionArea;

public long calculateRegionArea()

 function Leadtools.RasterImage.CalculateRegionArea()

public:
int64 CalculateRegionArea();

Return Value

The pixel count.

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

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Core
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.WinForms
Imports Leadtools.Dicom
Imports Leadtools.Drawing

Public Sub CalculateRegionAreaExample()
   Dim codecs As RasterCodecs = New RasterCodecs()

   Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")

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

   ' Add a region to the image
   Dim rc As LeadRect = New LeadRect(image.Width \ 3, image.Height \ 3, image.Width \ 3, image.Height \ 3)
   image.AddEllipseToRegion(Nothing, rc, RasterRegionCombineMode.Set)

   ' Get the number of pixels in the region
   Dim area As Integer = CInt(image.CalculateRegionArea())
   Console.WriteLine("Number of pixels in region after a region is added: {0}", area)

   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.WinForms;
using Leadtools.Dicom;
using Leadtools.Drawing;

      
public void CalculateRegionAreaExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string srcFileName = Path.Combine(ImagesPath.Path, "Image1.cmp");

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

   // Add a region to the image
   LeadRect rc = new LeadRect(image.Width / 3, image.Height / 3, image.Width / 3, image.Height / 3);
   image.AddEllipseToRegion(null, rc, RasterRegionCombineMode.Set);

   // Get the number of pixels in the region
   long area = image.CalculateRegionArea();
   Console.WriteLine("Number of pixels in region after a region is added: {0}", area);

   image.Dispose();
   codecs.Dispose();
}

RasterImageExamples.prototype.CalculateRegionAreaExample = function ( )
{
   Tools.SetLicense ( ) ;
   with ( Leadtools )
   {
      with ( Leadtools.Codecs ) 
      {
         var codecs = new RasterCodecs();

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

               // Add a region to the image
               var rc = LeadRectHelper.create(image.width / 3, image.height / 3, image.width / 3, image.height / 3);
               image.addEllipseToRegion(null, rc, RasterRegionCombineMode.set);

               // Get the number of pixels in the region
               var area = image.calculateRegionArea();
               console.info ("Number of pixels in region after a region is added: ", area);

               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 CalculateRegionAreaExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string srcFileName = @"Assets\Image1.cmp";

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

   // Add a region to the image
   LeadRect rc = LeadRectHelper.Create(image.Width / 3, image.Height / 3, image.Width / 3, image.Height / 3);
   image.AddEllipseToRegion(null, rc, RasterRegionCombineMode.Set);

   // Get the number of pixels in the region
   long area = image.CalculateRegionArea();
   Debug.WriteLine("Number of pixels in region after a region is added: {0}", area);

   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 CalculateRegionAreaExample()
{
   // create a new image to work with
   RasterImage image = new RasterImage(RasterMemoryFlags.Conventional, 500, 500, 24, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, null, null, 0);
   // Add a region to the image
   LeadRect rc = new LeadRect(image.Width / 3, image.Height / 3, image.Width / 3, image.Height / 3);
   image.AddRectangleToRegion(null, rc, RasterRegionCombineMode.Set);

   // Get the number of pixels in the region
   long area = image.CalculateRegionArea();
   Debug.WriteLine("Number of pixels in region after a region is added: {0}", area);

   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 CalculateRegionAreaExample()
   ' create a new image to work with
   Dim image As RasterImage = New RasterImage(RasterMemoryFlags.Conventional, 500, 500, 24, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, Nothing, Nothing, 0)
   ' Add a region to the image
   Dim rc As LeadRect = New LeadRect(image.Width / 3, image.Height / 3, image.Width / 3, image.Height / 3)
   image.AddRectangleToRegion(Nothing, rc, RasterRegionCombineMode.Set)

   ' Get the number of pixels in the region
   Dim area As Long = image.CalculateRegionArea()
   Debug.WriteLine("Number of pixels in region after a region is added: {0}", area)

   image.Dispose()
End Sub

Target Platforms

Reference

RasterImage Class
RasterImage Members