Finds and modifies areas of inverted text in a 1-bit black and white image.
public class InvertedTextCommand : RasterCommand
Public Class InvertedTextCommand
Inherits RasterCommand
@interface LTInvertedTextCommand : LTRasterCommand
public class InvertedTextCommand extends RasterCommand
public ref class InvertedTextCommand : public RasterCommand
This command is available in the Document/Medical Toolkits.
This command finds and modifies areas of inverted text that are common in scanned text documents. Below is an example of inverted text:
The behavior of this command can be modified by using an Event Handler that handles the InvertedTextCommandEventArgs.
For more information, refer to Cleaning Up 1-Bit Images.
Runs the InvertedTextCommand on an image.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Core;
public void InvertedTextCommandExample()
{
// Load an image
RasterCodecs codecs = new RasterCodecs();
codecs.ThrowExceptionsOnInvalidImages = true;
RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Clean.tif"));
// Prepare the command
InvertedTextCommand command = new InvertedTextCommand();
command.InvertedText += new EventHandler<InvertedTextCommandEventArgs>(InvertedTextEvent_S1);
command.Flags = InvertedTextCommandFlags.UseDpi;
command.MaximumBlackPercent = 95;
command.MinimumBlackPercent = 70;
command.MinimumInvertHeight = 500;
command.MinimumInvertWidth = 5000;
command.Run(image);
}
private void InvertedTextEvent_S1(object sender, InvertedTextCommandEventArgs e)
{
MessageBox.Show("Size " + "( " + e.BoundingRectangle.Left + ", " + e.BoundingRectangle.Top + ") - " + "( " + e.BoundingRectangle.Right + ", " + e.BoundingRectangle.Bottom + ")" +
"\n Black Count " + e.BlackCount.ToString() +
"\n White Count " + e.WhiteCount.ToString());
e.Status = RemoveStatus.Remove;
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Core
Public WithEvents invertedTextCommand_S1 As InvertedTextCommand
Public Sub InvertedTextCommandExample()
Dim codecs As New RasterCodecs()
codecs.ThrowExceptionsOnInvalidImages = True
Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Clean.tif"))
' Prepare the command
invertedTextCommand_S1 = New InvertedTextCommand
invertedTextCommand_S1.Flags = InvertedTextCommandFlags.UseDpi
invertedTextCommand_S1.MaximumBlackPercent = 95
invertedTextCommand_S1.MinimumBlackPercent = 70
invertedTextCommand_S1.MinimumInvertHeight = 500
invertedTextCommand_S1.MinimumInvertWidth = 5000
invertedTextCommand_S1.Run(leadImage)
End Sub
Private Sub InvertedTextCommand_InvertedText_S1(ByVal sender As Object, ByVal e As InvertedTextCommandEventArgs) Handles invertedTextCommand_S1.InvertedText
MessageBox.Show("Size " + "( " + e.BoundingRectangle.Left.ToString() + ", " + e.BoundingRectangle.Top.ToString() + ") - " + "( " + e.BoundingRectangle.Right.ToString() + ", " + e.BoundingRectangle.Bottom.ToString() + ")" +
Chr(13) + " Black Count " + e.BlackCount.ToString() +
Chr(13) + " White Count " + e.WhiteCount.ToString())
e.Status = RemoveStatus.Remove
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.Examples;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Core;
public void InvertedTextCommandExample(RasterImage image, Stream outStream)
{
// Prepare the command
InvertedTextCommand command = new InvertedTextCommand();
command.InvertedText += new EventHandler<InvertedTextCommandEventArgs>(InvertedTextEvent_S1);
command.Flags = InvertedTextCommandFlags.UseDpi;
command.MaximumBlackPercent = 95;
command.MinimumBlackPercent = 70;
command.MinimumInvertHeight = 500;
command.MinimumInvertWidth = 5000;
command.Run(image);
// Save result image
RasterCodecs codecs = new RasterCodecs();
codecs.Save(image, outStream, RasterImageFormat.CcittGroup4, 1);
image.Dispose();
}
private void InvertedTextEvent_S1(object sender, InvertedTextCommandEventArgs e)
{
Debug.WriteLine("Size " + "( " + e.BoundingRectangle.Left + ", " + e.BoundingRectangle.Top + ") - " + "( " + e.BoundingRectangle.Right + ", " + e.BoundingRectangle.Bottom + ")" +
"\n Black Count " + e.BlackCount.ToString() +
"\n White Count " + e.WhiteCount.ToString());
e.Status = RemoveStatus.Remove;
}
vb[Silverlight VB Example]
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Core
Public Sub InvertedTextCommandExample(ByVal image As RasterImage, ByVal outStream As Stream)
' Prepare the command
Dim command As InvertedTextCommand = New InvertedTextCommand()
AddHandler command.InvertedText, AddressOf InvertedTextEvent_S1
command.Flags = InvertedTextCommandFlags.UseDpi
command.MaximumBlackPercent = 95
command.MinimumBlackPercent = 70
command.MinimumInvertHeight = 500
command.MinimumInvertWidth = 5000
command.Run(image)
' Save result image
Dim codecs As RasterCodecs = New RasterCodecs()
codecs.Save(image, outStream, RasterImageFormat.CcittGroup4, 1)
image.Dispose()
End Sub
Private Sub InvertedTextEvent_S1(ByVal sender As Object, ByVal e As InvertedTextCommandEventArgs)
Debug.WriteLine("Size " & "( " & e.BoundingRectangle.Left & ", " & e.BoundingRectangle.Top & ") - " & "( " & e.BoundingRectangle.Right & ", " _
& e.BoundingRectangle.Bottom & ")" & Constants.vbLf & " Black Count " & e.BlackCount.ToString() & Constants.vbLf &
" White Count " & e.WhiteCount.ToString())
e.Status = RemoveStatus.Remove
End Sub
Help Collections
Raster .NET | C API | C++ Class Library | HTML5 JavaScript
Document .NET | C API | C++ Class Library | HTML5 JavaScript
Medical .NET | C API | C++ Class Library | HTML5 JavaScript
Medical Web Viewer .NET
Multimedia
Direct Show .NET | C API | Filters
Media Foundation .NET | C API | Transforms
Supported Platforms
.NET, Java, Android, and iOS/macOS Assemblies
Imaging, Medical, and Document
C API/C++ Class Libraries
Imaging, Medical, and Document
HTML5 JavaScript Libraries
Imaging, Medical, and Document
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