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LineRemoveCommand Class
See Also  Members   Example 
Leadtools.ImageProcessing.Core Namespace : LineRemoveCommand Class




Removes horizontal and vertical lines in a 1-bit black and white image. This command is available in the Document/Medical Toolkits.

Syntax

Visual Basic (Declaration) 
Public Class LineRemoveCommand 
   Inherits RasterCommand
   Implements IRasterCommand 
Visual Basic (Usage)Copy Code
Dim instance As LineRemoveCommand
C# 
public class LineRemoveCommand : RasterCommand, IRasterCommand 
Managed Extensions for C++ 
public __gc class LineRemoveCommand : public RasterCommand, IRasterCommand 
C++/CLI 
public ref class LineRemoveCommand : public RasterCommand, IRasterCommand 

Example

Visual BasicCopy Code
ImageProcessing.Core.LineRemoveCommand
   Public WithEvents lineRemoveCommand_S1 As LineRemoveCommand
   Public Sub LineRemoveCommandExample()
      RasterCodecs.Startup()
      Dim codecs As New RasterCodecs()
      codecs.ThrowExceptionsOnInvalidImages = True

      Dim leadImage As RasterImage = codecs.Load("C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\Clean.tif")

      ' Prepare the command
      lineRemoveCommand_S1 = New LineRemoveCommand
      lineRemoveCommand_S1.Type = LineRemoveCommandType.Horizontal
      lineRemoveCommand_S1.Flags = LineRemoveCommandFlags.UseGap
      lineRemoveCommand_S1.GapLength = 2
      lineRemoveCommand_S1.MaximumLineWidth = 5
      lineRemoveCommand_S1.MinimumLineLength = 200
      lineRemoveCommand_S1.MaximumWallPercent = 10
      lineRemoveCommand_S1.Wall = 7
      lineRemoveCommand_S1.Run(leadImage)

      RasterCodecs.Shutdown()
   End Sub

   Private Sub LineRemoveCommand_LineRemove_S1(ByVal sender As Object, ByVal e As LineRemoveCommandEventArgs) Handles lineRemoveCommand_S1.LineRemove
      MessageBox.Show("Row Col " + "( " + e.StartRow.ToString() + ", " + e.StartColumn.ToString() + " )" + _
                   Chr(13) + " Length " + e.Length.ToString())
      e.Status = RemoveStatus.Remove
   End Sub
C#Copy Code
ImageProcessing.Core.LineRemoveCommand 
      public void LineRemoveCommandExample() 
      { 
         // Load an image 
         RasterCodecs.Startup(); 
         RasterCodecs codecs = new RasterCodecs(); 
         codecs.ThrowExceptionsOnInvalidImages = true; 
 
         RasterImage image = codecs.Load(@"C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\Clean.tif"); 
 
         // Prepare the command 
         LineRemoveCommand command = new LineRemoveCommand(); 
         command.LineRemove       += new EventHandler<LineRemoveCommandEventArgs>(LineRemoveEvent_S1); 
         command.Type  = LineRemoveCommandType.Horizontal; 
         command.Flags = LineRemoveCommandFlags.UseGap; 
         command.GapLength = 2; 
         command.MaximumLineWidth = 5; 
         command.MinimumLineLength = 200; 
         command.MaximumWallPercent = 10; 
         command.Wall        = 7; 
         command.Run(image); 
 
         RasterCodecs.Shutdown(); 
      } 
 
      private void LineRemoveEvent_S1(object sender, LineRemoveCommandEventArgs e) 
      { 
         MessageBox.Show("Row Col "   + "( " + e.StartRow.ToString() + ", " + e.StartColumn + " )" + 
            "\n Length " + e.Length.ToString()); 
         e.Status= RemoveStatus.Remove; 
      }

Remarks

  • This command removes horizontal and vertical lines from scanned text documents. If the lines pass through text, the LineRemoveCommand properties/Constructor parameters can be configured to remove or preserve the text. The behavior of this command can be further modified by using an Event Handler that handles the LineRemoveCommandEventArgs.
  • This command works only on 1-bit black and white images.
  • If a region is selected, only the selected region will be changed by this command. If no region is selected, the whole image will be processed.
  • This command does not support signed data images.
  • This command does not support 32-bit grayscale images.
For more information, refer to Cleaning Up 1-Bit Images.

Inheritance Hierarchy

System.Object
   Leadtools.ImageProcessing.RasterCommand
      Leadtools.ImageProcessing.Core.LineRemoveCommand

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also