VintaSoft Imaging .NET SDK v8.6
Vintasoft.Imaging.ImageProcessing.Document Namespace / LineRemovalCommand Class
Members Example



In This Topic
    LineRemovalCommand Class
    In This Topic
    Removes (fills) lines on document image automatically (lines of forms, tables, underlining/strikethrough of text, noise).
    Object Model
    LineRemovalCommand ClassProcessingCommandBase ClassRegionOfInterest ClassProcessingCommandResults ClassProcessingCommandResult Class
    Syntax
    'Declaration
     
    Public Class LineRemovalCommand 
       Inherits Vintasoft.Imaging.ImageProcessing.ProcessingCommandWithRegion
    public __gc class LineRemovalCommand : public Vintasoft.Imaging.ImageProcessing.ProcessingCommandWithRegion 
    public ref class LineRemovalCommand : public Vintasoft.Imaging.ImageProcessing.ProcessingCommandWithRegion 
    Remarks
    Here is a "good" sequence of operations for the document image processing:
    1. Invert an inverted image (AutoInvertCommand)
    2. Clear a border of an image (BorderClearCommand)
    3. Remove halftone from an image (HalftoneRemovalCommand)
    4. Deskew an image (DeskewCommand)
    5. Remove hole punches from an image (HolePunchRemovalCommand)
    6. Remove lines from an image (LineRemovalCommand)
    7. Invert inverted text regions on an image (AutoTextInvertCommand)
    8. Despeckle an image (DespeckleCommand)
    9. Remove border of an image (BorderRemovalCommand)
    Vintasoft.Imaging.ImageProcessing.ProcessingCommandWithRegion.RegionOfInterest property can be used for specifying the region of interest for this command.
    Example
    This example shows how to load an image of document from disk, prepare the image of document for OCR and save the result to the new image file.
    Class DocumentCommandsExample
        Public Sub ProcessImage()
            ' [ do not forget to set your image file path here! ]
            ' open an existing image
            Dim image As New Vintasoft.Imaging.VintasoftImage("G:\SampleImages\Border.tif")
                
            Try
                ' invert an image if image is inverted
                ExecuteCommand(New Vintasoft.Imaging.ImageProcessing.Document.AutoInvertCommand(), image)
                
                ' clear noise on a border of the image
                ExecuteCommand(New Vintasoft.Imaging.ImageProcessing.Document.BorderClearCommand(), image)
                
                ' remove halftone from the image
                ExecuteCommand(New Vintasoft.Imaging.ImageProcessing.Document.HalftoneRemovalCommand(), image)
                
                ' detect the correct orientation of the image
                ExecuteCommand(New Vintasoft.Imaging.ImageProcessing.Document.DeskewCommand(), image)
                
                ' remove hole punches on image
                ExecuteCommand(New Vintasoft.Imaging.ImageProcessing.Document.HolePunchRemovalCommand(), image)
                
                ' remove tables on image
                ExecuteCommand(New Vintasoft.Imaging.ImageProcessing.Document.LineRemovalCommand(Vintasoft.Imaging.ImageProcessing.LinesType.Tables), image)
                
                ' invert inverted text regions on an image
                ExecuteCommand(New Vintasoft.Imaging.ImageProcessing.Document.AutoTextInvertCommand(), image)
                
                ' remove noise from the image
                ExecuteCommand(New Vintasoft.Imaging.ImageProcessing.Document.DespeckleCommand(), image)
                
                ' remove border around the image
                ExecuteCommand(New Vintasoft.Imaging.ImageProcessing.Document.BorderRemovalCommand(), image)
            Catch ex As Vintasoft.Imaging.ImageProcessing.ImageProcessingException
                ' show error message if problem occured
                System.Windows.Forms.MessageBox.Show(ex.Message)
                Return
            End Try
                
            ' save the processed image to the new file
            image.Save("G:\processed-image.tif")
        End Sub
                
        Private Sub ExecuteCommand(command As Vintasoft.Imaging.ImageProcessing.ProcessingCommandBase, image As Vintasoft.Imaging.VintasoftImage)
            ' subscribe to the progress event of command
            AddHandler command.Progress, New System.EventHandler(Of Vintasoft.Imaging.ImageProcessing.ImageProcessingProgressEventArgs)(AddressOf command_Progress)
                
            ' execute the command
            command.ExecuteInPlace(image)
                
            ' unsubscribe from the progress event of command
            RemoveHandler command.Progress, New System.EventHandler(Of Vintasoft.Imaging.ImageProcessing.ImageProcessingProgressEventArgs)(AddressOf command_Progress)
        End Sub
                
        Private Sub command_Progress(sender As Object, e As Vintasoft.Imaging.ImageProcessing.ImageProcessingProgressEventArgs)
            ' update progress info using e.Progress property
            ' ...
                
            ' cancel execution of command using e.Cancel property if necessary
            ' ...
        End Sub
    End Class
    class DocumentCommandsExample
    {
        public void ProcessImage()
        {
            // [ do not forget to set your image file path here! ]
            // open an existing image
            Vintasoft.Imaging.VintasoftImage image =
                new Vintasoft.Imaging.VintasoftImage(@"G:\SampleImages\Border.tif");
                
            try
            {
                // invert an image if image is inverted
                ExecuteCommand(
                    new Vintasoft.Imaging.ImageProcessing.Document.AutoInvertCommand(), image);
                
                // clear noise on a border of the image
                ExecuteCommand(
                    new Vintasoft.Imaging.ImageProcessing.Document.BorderClearCommand(), image);
                
                // remove halftone from the image
                ExecuteCommand(
                    new Vintasoft.Imaging.ImageProcessing.Document.HalftoneRemovalCommand(), image);
                
                // detect the correct orientation of the image
                ExecuteCommand(
                    new Vintasoft.Imaging.ImageProcessing.Document.DeskewCommand(), image);
                
                // remove hole punches on image
                ExecuteCommand(
                    new Vintasoft.Imaging.ImageProcessing.Document.HolePunchRemovalCommand(), image);
                
                // remove tables on image
                ExecuteCommand(
                    new Vintasoft.Imaging.ImageProcessing.Document.LineRemovalCommand(
                        Vintasoft.Imaging.ImageProcessing.LinesType.Tables),
                    image);
                
                // invert inverted text regions on an image
                ExecuteCommand(
                    new Vintasoft.Imaging.ImageProcessing.Document.AutoTextInvertCommand(), image);
                
                // remove noise from the image
                ExecuteCommand(
                    new Vintasoft.Imaging.ImageProcessing.Document.DespeckleCommand(), image);
                
                // remove border around the image
                ExecuteCommand(
                    new Vintasoft.Imaging.ImageProcessing.Document.BorderRemovalCommand(), image);
            }
            catch (Vintasoft.Imaging.ImageProcessing.ImageProcessingException ex)
            {
                // show error message if problem occured
                System.Windows.Forms.MessageBox.Show(ex.Message);
                return;
            }
                
            // save the processed image to the new file
            image.Save(@"G:\processed-image.tif");
        }
                
        void ExecuteCommand(
            Vintasoft.Imaging.ImageProcessing.ProcessingCommandBase command,
            Vintasoft.Imaging.VintasoftImage image)
        {
            // subscribe to the progress event of command
            command.Progress +=
                new System.EventHandler<Vintasoft.Imaging.ImageProcessing.ImageProcessingProgressEventArgs>(command_Progress);
                
            // execute the command
            command.ExecuteInPlace(image);
                
            // unsubscribe from the progress event of command
            command.Progress -=
                new System.EventHandler<Vintasoft.Imaging.ImageProcessing.ImageProcessingProgressEventArgs>(command_Progress);
        }
                
        void command_Progress(object sender, Vintasoft.Imaging.ImageProcessing.ImageProcessingProgressEventArgs e)
        {
            // update progress info using e.Progress property
            // ...
                
            // cancel execution of command using e.Cancel property if necessary
            // ...
        }
    }
    Inheritance Hierarchy

    System.Object
       Vintasoft.Imaging.ImageProcessing.ProcessingCommandBase
          Vintasoft.Imaging.ImageProcessing.ProcessingCommandWithRegion
             Vintasoft.Imaging.ImageProcessing.Document.LineRemovalCommand

    Requirements

    Target Platforms: Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, Windows Server 2012, Windows Server 2008, Windows Server 2003

    See Also