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RegionContains Method

Summary

Determines whether the specified pixel is in the image region.

Syntax

C#
VB
Java
Objective-C
WinRT C#
C++
public bool RegionContains( 
   int row, 
   int col 
) 
Public Function RegionContains( _ 
   ByVal row As Integer, _ 
   ByVal col As Integer _ 
) As Boolean 
public bool RegionContains(  
   int row, 
   int col 
) 
- (BOOL)regionContainsPoint:(LeadPoint)point 
public boolean regionContains(int row, int col) 
 function Leadtools.RasterImage.RegionContains(  
   row , 
   col  
) 
public: 
bool RegionContains(  
   int row, 
   int col 
)  

Parameters

row
The row number of the pixel.

col
The column number of the pixel.

Return Value

true if the specified pixel is in the region; false, otherwise.

Remarks

This method uses image coordinates to specify the pixel. Therefore, you must account for the view perspective of the image.

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

Example

C#
VB
Silverlight C#
Silverlight VB
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 LeadtoolsExamples.Common; 
using Leadtools.Svg; 
 
public void RegionContainsExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(ImagesPath.Path, "Image1.cmp"); 
   string destFileName = Path.Combine(ImagesPath.Path, "Image1_RegionContains.bmp"); 
 
   // Load the image 
   RasterImage image = codecs.Load(srcFileName); 
 
   // Add an ellipse inside a rectangle 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); 
 
   // Loop through the image and turn all pixels in the region to double intensity 
   for (int y = 0; y < image.Height; y++) 
   { 
      for (int x = 0; x < image.Width; x++) 
      { 
         if (image.RegionContains(y, x)) 
         { 
            RasterColor clr = image.GetPixelColor(y, x); 
            clr = new RasterColor(clr.R * 2, clr.G * 2, clr.B * 2); 
            image.SetPixelColor(y, x, clr); 
         } 
      } 
   } 
 
   codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24); 
 
   image.Dispose(); 
   codecs.Dispose(); 
} 
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 RegionContainsExample() 
   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_RegionContains.bmp") 
 
   ' Load the image 
   Dim image As RasterImage = codecs.Load(srcFileName) 
 
   ' Add an ellipse inside a rectangle 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) 
 
   ' Loop through the image and turn all pixels in the region to double intensity 
   Dim y As Integer = 0 
   Do While y < image.Height 
      Dim x As Integer = 0 
      Do While x < image.Width 
         If image.RegionContains(y, x) Then 
            Dim clr As RasterColor = image.GetPixelColor(y, x) 
            clr = New RasterColor(clr.R * 2, clr.G * 2, clr.B * 2) 
            image.SetPixelColor(y, x, clr) 
         End If 
         x += 1 
      Loop 
      y += 1 
   Loop 
 
   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.Dicom; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Core; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Examples; 
using Leadtools.Windows.Media; 
 
public void RegionContainsExample(Stream destStream) 
{ 
   // 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 rectangle 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); 
 
   // Loop through the image and turn all pixels in the region to double intensity 
   for (int y = 0; y < image.Height; y++) 
   { 
      for (int x = 0; x < image.Width; x++) 
      { 
         if (image.RegionContains(y, x)) 
         { 
            RasterColor clr = image.GetPixelColor(y, x); 
            clr = new RasterColor(clr.R * 2, clr.G * 2, clr.B * 2); 
            image.SetPixelColor(y, x, clr); 
         } 
      } 
   } 
 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.Save(image, destStream, RasterImageFormat.Bmp, 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 RegionContainsExample(ByVal destStream As Stream) 
   ' 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 rectangle 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) 
 
   ' Loop through the image and turn all pixels in the region to double intensity 
   Dim y As Integer = 0 
   Do While y < image.Height 
      Dim x As Integer = 0 
      Do While x < image.Width 
         If image.RegionContains(y, x) Then 
            Dim clr As RasterColor = image.GetPixelColor(y, x) 
            clr = New RasterColor(clr.R * 2, clr.G * 2, clr.B * 2) 
            image.SetPixelColor(y, x, clr) 
         End If 
         x += 1 
      Loop 
      y += 1 
   Loop 
 
   Dim codecs As RasterCodecs = New RasterCodecs() 
   codecs.Save(image, destStream, RasterImageFormat.Bmp, 0) 
 
   image.Dispose() 
End Sub 

Requirements

Target Platforms

Help Version 19.0.2017.10.19
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