UnsharpMaskCommand Class

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

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

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

'Usage
 
Dim instance As UnsharpMaskCommand

public sealed class UnsharpMaskCommand : Leadtools.ImageProcessing.IRasterCommand

function Leadtools.ImageProcessing.Effects.UnsharpMaskCommand()

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

This command is actually considered a sharpening method. It is used to sharpen the image with a minimum of noise. To reduce the noise, it starts by blurring a copy of the original image. The amount of blur depends on Radius. The method then determines the difference between each pixel's value of the original image and the corresponding pixel's value in the blurred image. If the difference is greater than the threshold value, then the difference between the pixel values is multiplied by the amount value and added to the original pixel value.
To increase the thickness of the sharpened edges, increase the radius value.
To increase the amount of sharpness, increase the amount value.
To reduce the noise and eliminate the small edges or individual pixels that will produce noise in image, increase the threshold value.
Using the Yuv color space decreases the processing time.
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 Detecting and Enhancing Edges and Lines.

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

Public Sub UnsharpMaskCommandExample()
   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 UnsharpMaskCommand = New UnsharpMaskCommand
   command.Amount = 200
   command.Radius = 15
   command.Threshold = 50
   command.ColorType = UnsharpMaskCommandColorType.Rgb
   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 UnsharpMaskCommandExample()
   {
      // Load an image
      RasterCodecs codecs = new RasterCodecs();
      codecs.ThrowExceptionsOnInvalidImages = true;

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

      // Prepare the command
      UnsharpMaskCommand command = new UnsharpMaskCommand();
      command.Amount = 200;
      command.Radius = 15;
      command.Threshold = 50;
      command.ColorType = UnsharpMaskCommandColorType.Rgb;
      command.Run(image);

   }

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

[TestMethod]
public async Task UnsharpMaskCommandExample()
{
   // 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
   UnsharpMaskCommand command = new UnsharpMaskCommand();
   command.Amount = 200;
   command.Radius = 15;
   command.Threshold = 50;
   command.ColorType = UnsharpMaskCommandColorType.Rgb;
   command.Run(image);

}

public void UnsharpMaskCommandExample(RasterImage image, Stream outStream)
{
   // Prepare the command
   UnsharpMaskCommand command = new UnsharpMaskCommand();
   command.Amount = 200;
   command.Radius = 15;
   command.Threshold = 50;
   command.ColorType = UnsharpMaskCommandColorType.Rgb;
   command.Run(image);
   // Save result image
   RasterCodecs codecs = new RasterCodecs();
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24);
   image.Dispose();
}

Public Sub UnsharpMaskCommandExample(ByVal image As RasterImage, ByVal outStream As Stream)
   ' Prepare the command
   Dim command As UnsharpMaskCommand = New UnsharpMaskCommand()
   command.Amount = 200
   command.Radius = 15
   command.Threshold = 50
   command.ColorType = UnsharpMaskCommandColorType.Rgb
   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