Creates a 1-bit mask image from the region that is defined in the image.
public RasterImage CreateMaskFromRegion()
Public Function CreateMaskFromRegion() As RasterImage
- (nullable LTRasterImage *)createMaskFromRegion:(NSError **)error
public RasterImage createMaskFromRegion()
public:
RasterImage^ CreateMaskFromRegion();
The newly created RasterImage which will be updated with a 1-bit, black-and-white image, where pixels from the region are white, and all others are black.
For more information, refer to Implementing Transparency.
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.
This example will load an image, sets a color region using black, and then creates a 1-bit mask image from that image and saves it 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 LeadtoolsExamples.Common;
using Leadtools.Svg;
public void CreateMaskFromRegionExample()
{
RasterCodecs codecs = new RasterCodecs();
string srcFileName = Path.Combine(ImagesPath.Path, "Image1.cmp");
string destFileName = Path.Combine(ImagesPath.Path, "Image1_CreateMaskFromRegion.bmp");
// Load the image
RasterImage image = codecs.Load(srcFileName);
// Posterize the image to decrease the number of colors
PosterizeCommand posterize = new PosterizeCommand(16);
posterize.Run(image);
// Specify a pixel in the upper left of the displayed image
LeadPoint pt = new LeadPoint(image.ImageWidth / 8, image.ImageHeight / 8);
// Adjust the point in case the view perspective is not TopLeft
pt = image.PointToImage(RasterViewPerspective.TopLeft, pt);
// Get the color of the specified pixel
RasterColor regionColor = image.GetPixelColor(pt.Y, pt.X);
// Create a region that includes all pixels of that color
image.AddColorToRegion(regionColor, RasterRegionCombineMode.Set);
RasterImage maskImage = image.CreateMaskFromRegion();
codecs.Save(maskImage, destFileName, RasterImageFormat.Bmp, 1);
maskImage.Dispose();
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 CreateMaskFromRegionExample()
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_CreateMaskFromRegion.bmp")
' Load the image
Dim image As RasterImage = codecs.Load(srcFileName)
' Posterize the image to decrease the number of colors
Dim posterize As PosterizeCommand = New PosterizeCommand(16)
posterize.Run(image)
' Specify a pixel in the upper left of the displayed image
Dim pt As LeadPoint = New LeadPoint(image.ImageWidth \ 8, image.ImageHeight \ 8)
' Adjust the point in case the view perspective is not TopLeft
pt = image.PointToImage(RasterViewPerspective.TopLeft, pt)
' Get the color of the specified pixel
Dim regionColor As RasterColor = image.GetPixelColor(pt.Y, pt.X)
' Create a region that includes all pixels of that color
image.AddColorToRegion(regionColor, RasterRegionCombineMode.Set)
Dim maskImage As RasterImage = image.CreateMaskFromRegion()
codecs.Save(maskImage, destFileName, RasterImageFormat.Bmp, 1)
maskImage.Dispose()
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 CreateMaskFromRegionExample(RasterImage image, Stream destStream)
{
// Posterize the image to decrease the number of colors
PosterizeCommand posterize = new PosterizeCommand(16);
posterize.Run(image);
// Specify a pixel in the upper left of the displayed image
LeadPoint pt = new LeadPoint(image.ImageWidth / 8, image.ImageHeight / 8);
// Adjust the point in case the view perspective is not TopLeft
pt = image.PointToImage(RasterViewPerspective.TopLeft, pt);
// Get the color of the specified pixel
RasterColor regionColor = image.GetPixelColor(pt.Y, pt.X);
// Create a region that includes all pixels of that color
image.AddColorToRegion(regionColor, RasterRegionCombineMode.Set);
RasterImage maskImage = image.CreateMaskFromRegion();
RasterCodecs codecs = new RasterCodecs();
codecs.Save(maskImage, destStream, RasterImageFormat.Png, 0);
maskImage.Dispose();
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 CreateMaskFromRegionExample(ByVal image As RasterImage, ByVal destStream As Stream)
' Posterize the image to decrease the number of colors
Dim posterize As PosterizeCommand = New PosterizeCommand(16)
posterize.Run(image)
' Specify a pixel in the upper left of the displayed image
Dim pt As LeadPoint = New LeadPoint(image.ImageWidth / 8, image.ImageHeight / 8)
' Adjust the point in case the view perspective is not TopLeft
pt = image.PointToImage(RasterViewPerspective.TopLeft, pt)
' Get the color of the specified pixel
Dim regionColor As RasterColor = image.GetPixelColor(pt.Y, pt.X)
' Create a region that includes all pixels of that color
image.AddColorToRegion(regionColor, RasterRegionCombineMode.Set)
Dim maskImage As RasterImage = image.CreateMaskFromRegion()
Dim codecs As RasterCodecs = New RasterCodecs()
codecs.Save(maskImage, destStream, RasterImageFormat.Png, 0)
maskImage.Dispose()
image.Dispose()
End Sub
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