Determines whether the specified pixel is in the image region.
- (BOOL)regionContainsPoint:(LeadPoint)point
row
The row number of the pixel.
col
The column number of the pixel.
true if the specified pixel is in the region; false, otherwise.
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.
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
c#[Silverlight C# Example]
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();
}
vb[Silverlight VB Example]
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
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