SmoothCommand Class

Smooths the bumps and fills in the nicks of a 1-bit black and white image. This command is available in the Document/Medical Toolkits.

Object Model

Syntax

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public class SmoothCommand : Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

'Declaration
 
Public Class SmoothCommand 
   Inherits Leadtools.ImageProcessing.RasterCommand
   Implements Leadtools.ImageProcessing.IRasterCommand

'Usage
 
Dim instance As SmoothCommand

public sealed class SmoothCommand : Leadtools.ImageProcessing.IRasterCommand

function Leadtools.ImageProcessing.Core.SmoothCommand()

public ref class SmoothCommand : public Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

Remarks

This command smooths the text in scanned text documents. The behavior of this command can be modified by using an Event Handler that handles the SmoothCommandEventArgs. This command works only on 1-bit black and white images.
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.

In Silverlight and Windows Phone versions of LEADTOOLS, this image processing command will fail if the image data for the RasterImage object is stored internally using a Silverlight WriteableBitmap object. For more information, refer to Image Processing Command Limitations in Silverlight.

Example

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Public WithEvents smoothEventExample_S1 As SmoothCommand
Public Sub SmoothCommandExample()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True

   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Clean.tif"))

   ' Prepare the command
   smoothEventExample_S1 = New SmoothCommand
   smoothEventExample_S1.Flags = SmoothCommandFlags.FavorLong
   smoothEventExample_S1.Length = 2
   smoothEventExample_S1.Run(leadImage)

End Sub

Private Sub SmoothEventExample_SmoothCommand_S1(ByVal sender As Object, ByVal e As SmoothCommandEventArgs) Handles smoothEventExample_S1.Smooth
   Dim BumpOrNeck As String
   Dim Direction As String

   If (e.BumpNick = SmoothCommandBumpNickType.Bump) Then
      BumpOrNeck = "Bump"
   Else
      BumpOrNeck = "Neck"
   End If


   If (e.Direction = SmoothCommandDirectionType.Horizontal) Then
      Direction = "Horizontal"
   Else
      Direction = "Vertical"
   End If


   MessageBox.Show("Type " + BumpOrNeck.ToString() + _
            Chr(13) + " Row Column " + e.StartRow.ToString() + e.StartColumn.ToString() + _
            Chr(13) + " Length " + e.Length.ToString() + _
            Chr(13) + " Direction " + Direction.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

public void SmoothCommandExample()
   {
      // Load an image
      RasterCodecs codecs = new RasterCodecs();
      codecs.ThrowExceptionsOnInvalidImages = true;

      RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "clean.tif"));

      // Prepare the command
      SmoothCommand command = new SmoothCommand();
      command.Smooth += new EventHandler<SmoothCommandEventArgs>(SmoothEventExample_S1);
      command.Flags  = SmoothCommandFlags.FavorLong ;
      command.Length = 2;

      command.Run(image);

   }

   private void SmoothEventExample_S1(object sender, SmoothCommandEventArgs e)
   {
      string BumpOrNeck;
      string Direction;

      if (e.BumpNick == SmoothCommandBumpNickType.Bump)
         BumpOrNeck = "Bump";
      else
         BumpOrNeck = "Neck";

      if (e.Direction == SmoothCommandDirectionType.Horizontal)
         Direction = "Horizontal";
      else
         Direction = "Vertical";

      MessageBox.Show("Type "          + BumpOrNeck +
         "\n Row Column " + e.StartRow.ToString() + e.StartColumn.ToString() +
         "\n Length "     + e.Length +
         "\n Direction "  + Direction);

      e.Status = RemoveStatus.Remove;
   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

function SmoothCommandExample() {
   var codecs = new Leadtools.Codecs.RasterCodecs();
   codecs.throwExceptionsOnInvalidImages = true;

   // Load the image
   var srcFileName = "Assets\\Clean.tif";
   var processedImage;
   return Tools.AppInstallFolder().getFileAsync(srcFileName).then(function (loadFile) {
      return codecs.loadAsync(Leadtools.LeadStreamFactory.create(loadFile));
   }).then(function (image) {
      // Prepare the command
      with (Leadtools.ImageProcessing.Core) {
         var command = new SmoothCommand();
         command.addEventListener("smooth", SmoothEventExample_S1);
         command.flags = SmoothCommandFlags.favorLong;
         command.length = 2;

         command.run(image);
      }
   });
}

function SmoothEventExample_S1(e) {
   var BumpOrNeck;
   var Direction;

   with (Leadtools.ImageProcessing.Core) {
      if (e.bumpNick == SmoothCommandBumpNickType.bump)
         BumpOrNeck = "Bump";
      else
         BumpOrNeck = "Neck";

      if (e.direction == SmoothCommandDirectionType.horizontal)
         Direction = "Horizontal";
      else
         Direction = "Vertical";

      console.error("Type " + BumpOrNeck +
         "\n Row Column " + e.startRow.toString() + "," + e.startColumn.toString() +
         "\n Length " + e.length +
         "\n Direction " + Direction);

      e.status = RemoveStatus.remove;
   }
}

[TestMethod]
public async Task SmoothCommandExample()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   // Load the image
   string srcFileName = @"Assets\Clean.tif";
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

   // Prepare the command
   SmoothCommand command = new SmoothCommand();
   command.Smooth += new EventHandler<SmoothCommandEventArgs>(SmoothEventExample_S1);
   command.Flags  = SmoothCommandFlags.FavorLong ;
   command.Length = 2;

   command.Run(image);

}

private void SmoothEventExample_S1(object sender, SmoothCommandEventArgs e)
{
   string BumpOrNeck;
   string Direction;

   if (e.BumpNick == SmoothCommandBumpNickType.Bump)
      BumpOrNeck = "Bump";
   else
      BumpOrNeck = "Neck";

   if (e.Direction == SmoothCommandDirectionType.Horizontal)
      Direction = "Horizontal";
   else
      Direction = "Vertical";

   Debug.WriteLine("Type "          + BumpOrNeck +
      "\n Row Column " + e.StartRow.ToString() + e.StartColumn.ToString() +
      "\n Length "     + e.Length +
      "\n Direction "  + Direction);

   e.Status = RemoveStatus.Remove;
}

public void SmoothCommandExample(RasterImage image, Stream outStream)
{
   // Prepare the command
   SmoothCommand command = new SmoothCommand();
   command.Smooth += new EventHandler<SmoothCommandEventArgs>(SmoothEventExample_S1);
   command.Flags = SmoothCommandFlags.FavorLong;
   command.Length = 2;
   command.Run(image);
   // Save result image
   RasterCodecs codecs = new RasterCodecs();
   codecs.Save(image, outStream, RasterImageFormat.CcittGroup4, 1);
   image.Dispose();
}

private void SmoothEventExample_S1(object sender, SmoothCommandEventArgs e)
{
   string BumpOrNeck;
   string Direction;

   if (e.BumpNick == SmoothCommandBumpNickType.Bump)
      BumpOrNeck = "Bump";
   else
      BumpOrNeck = "Neck";

   if (e.Direction == SmoothCommandDirectionType.Horizontal)
      Direction = "Horizontal";
   else
      Direction = "Vertical";

   Debug.WriteLine("Type "          + BumpOrNeck +
      "\n Row Column " + e.StartRow.ToString() + e.StartColumn.ToString() +
      "\n Length "     + e.Length +
      "\n Direction "  + Direction);

   e.Status = RemoveStatus.Remove;
}

Public Sub SmoothCommandExample(ByVal image As RasterImage, ByVal outStream As Stream)
   ' Prepare the command
   Dim command As SmoothCommand = New SmoothCommand()
   AddHandler command.Smooth, AddressOf SmoothEventExample_S1
   command.Flags = SmoothCommandFlags.FavorLong
   command.Length = 2
   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 SmoothEventExample_S1(ByVal sender As Object, ByVal e As SmoothCommandEventArgs)
   Dim BumpOrNeck As String
   Dim Direction As String

   If e.BumpNick = SmoothCommandBumpNickType.Bump Then
      BumpOrNeck = "Bump"
   Else
      BumpOrNeck = "Neck"
   End If

   If e.Direction = SmoothCommandDirectionType.Horizontal Then
      Direction = "Horizontal"
   Else
      Direction = "Vertical"
   End If

   Debug.WriteLine("Type " & BumpOrNeck & Constants.vbLf & " Row Column " & e.StartRow.ToString() & e.StartColumn.ToString() & Constants.vbLf & _
                   " Length " & e.Length + Constants.vbLf & " Direction " & Direction)

   e.Status = RemoveStatus.Remove
End Sub

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

SmoothCommand Members
Leadtools.ImageProcessing.Core Namespace
Cleaning Up 1-Bit Images
BorderRemoveCommand Class
LineRemoveCommand Class
InvertedTextCommand Class
InvertedPageCommand Class
DotRemoveCommand Class
HolePunchRemoveCommand Class
HighQualityRotateCommand Class
MinimumCommand Class
MaximumCommand Class
Leadtools.ImageProcessing.Effects.RegionHolesRemovalCommand