UnsharpMaskCommand Class

C#
Visual Basic
WinRT C#
Java
Objective-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

@interface LTUnsharpMaskCommand : LTRasterCommand

public class UnsharpMaskCommand extends RasterCommand

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.
This command supports signed/unsigned data images.

For more information, refer to Detecting and Enhancing Edges and Lines.

Run the UnsharpMaskCommand on an image.

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

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Effects

   
Public Sub UnsharpMaskCommandExample()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1.CMP"))

   ' 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

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Effects;

      
public void UnsharpMaskCommandExample()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1.CMP"));

   // 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";
}

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Effects;
using Leadtools.ImageProcessing;

      
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);

}

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Effects;
using Leadtools.Examples;

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();
}

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Effects

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

Reference