HighPassCommand Class

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

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

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

'Usage
 
Dim instance As HighPassCommand

public sealed class HighPassCommand : Leadtools.ImageProcessing.IRasterCommand

function Leadtools.ImageProcessing.Effects.HighPassCommand()

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

This command removes low-frequency detail in the image. The method is opposite to that of the Gaussian Blur method
To increase the thickness of the edges, increase the value of radius. Usually a low value for radius is better.
Unlike the UnsharpMaskCommand, when using this command, the low frequency features are removed from the image.

As an example, if you use the following image:

And you were to call HighPassCommand using the following settings:

Parameter	Value
Radius	6
Opacity	100

The following figure results:

If the image has a region, the command will be applied on the region only.
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.

For more information, refer to Removing Noise.

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

Public Sub HighPassCommandExample()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True

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

   ' Prepare the command
   Dim command As HighPassCommand = New HighPassCommand
   command.Radius = 6
   command.Opacity = 100
   command.Run(leadImage)
   codecs.Save(leadImage, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24)

End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

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

      RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"));

      // Prepare the command
      HighPassCommand command = new HighPassCommand () ;
      command.Radius = 6 ;
      command.Opacity = 100 ;
      command.Run(image);
      codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24);

   }

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

[TestMethod]
public async Task HighPassCommandExample()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   // Load the image
   string srcFileName = @"Assets\Image1.cmp";
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

   // Prepare the command
   HighPassCommand command = new HighPassCommand () ;
   command.Radius = 6 ;
   command.Opacity = 100 ;
   command.Run(image);
   //Save as BMP
   string destFileName = @"result.bmp";
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName);
   await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Bmp, 24);

}

public void HighPassCommandExample(RasterImage image, Stream outStream)
{
   // Prepare the command
   HighPassCommand command = new HighPassCommand();
   command.Radius = 6;
   command.Opacity = 100;
   command.Run(image);
   // Save result image
   RasterCodecs codecs = new RasterCodecs();
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24);
   image.Dispose();
}

Public Sub HighPassCommandExample(ByVal image As RasterImage, ByVal outStream As Stream)
   ' Prepare the command
   Dim command As HighPassCommand = New HighPassCommand()
   command.Radius = 6
   command.Opacity = 100
   command.Run(image)
   ' Save result image
   Dim codecs As RasterCodecs = New RasterCodecs()
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24)
   image.Dispose()
End Sub

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

HighPassCommand Members
Leadtools.ImageProcessing.Effects Namespace
Removing Noise
SharpenCommand Class
Leadtools.ImageProcessing.Color.PosterizeCommand
MosaicCommand Class
EmbossCommand Class
Leadtools.ImageProcessing.Core.MedianCommand
AddNoiseCommand Class
Leadtools.ImageProcessing.Color.IntensityDetectCommand
SpatialFilterCommand Class
BinaryFilterCommand Class
Leadtools.ImageProcessing.Color.SolarizeCommand
Leadtools.ImageProcessing.Core.WindowLevelCommand
UnsharpMaskCommand Class
GaussianCommand Class