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DespeckleCommand Class

Summary

Removes speckles from an image. Typically, this command is used to clean up scanned images (such as FAX images). This command is available in the Document/Medical Toolkits.

Syntax
C#
VB
Java
Objective-C
C++
public class DespeckleCommand : RasterCommand 
Public Class DespeckleCommand  
   Inherits RasterCommand 
@interface LTDespeckleCommand : LTRasterCommand 
public class DespeckleCommand extends RasterCommand 
public ref class DespeckleCommand : public RasterCommand   

Remarks
  • This command removes 1-pixel speckles, and shrinks some larger speckles. Therefore, in some cases, larger speckles can be completely removed by running it more than once.
  • This command supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
  • This command does not support 32-bit grayscale images.
  • This command supports signed/unsigned data images.

For more information, refer to Removing Noise.

Example

Runs the DespeckleCommand on an image and removes speckles from it.

C#
VB
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void DespeckleCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Clean.tif")); 
 
   // Prepare the command 
   DespeckleCommand command = new DespeckleCommand(); 
   //Remove speckles from the image. 
   command.Run(image); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
} 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
 
Public Sub DespeckleCommandExample() 
   Dim codecs As New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Clean.tif")) 
 
   ' Prepare the command 
   Dim command As DespeckleCommand = New DespeckleCommand 
   'Remove speckles from the image. 
 
   command.Run(leadImage) 
 
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 DespeckleCommandExample(RasterImage image, Stream outStream) 
{ 
   // Prepare the command 
   DespeckleCommand command = new DespeckleCommand(); 
   //Remove speckles from the image. 
   command.Run(image); 
 
   // Save result image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.Save(image, outStream, RasterImageFormat.CcittGroup4, 1); 
   image.Dispose(); 
} 
vb[Silverlight VB Example] 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
 
Public Sub DespeckleCommandExample(ByVal image As RasterImage, ByVal outStream As Stream) 
   ' Prepare the command 
   Dim command As DespeckleCommand = New DespeckleCommand() 
   'Remove speckles from the image. 
   command.Run(image) 
 
   ' Save result image 
   Dim codecs As RasterCodecs = New RasterCodecs() 
   codecs.Save(image, outStream, RasterImageFormat.CcittGroup4, 1) 
   image.Dispose() 
End Sub 

Requirements

Target Platforms

Help Version 20.0.2019.3.12
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Leadtools.ImageProcessing.Core Assembly