MultiscaleEnhancementCommand Class

Enhances an image's contrast, edges, and density range for use in Computed Radiography (CR), in a way that all relevant image features are rendered with an appropriate level of visibility. This command is available in the Medical toolkits.

Object Model

Syntax

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

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

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

'Usage
 
Dim instance As MultiscaleEnhancementCommand

public sealed class MultiscaleEnhancementCommand : Leadtools.ImageProcessing.IRasterCommand

function Leadtools.ImageProcessing.Core.MultiscaleEnhancementCommand()

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

Remarks

The command wraps techniques of image enhancements, such as contrast enhancement, edge enhancement and latitude reduction, for Computed Radiography (CR).
In multi scale enhancement, the image is decomposed into components or levels. Those components or levels that contain details will be enhanced separately from other components or levels.
This will improve the visualization for the subtle image features without the risk of losing information of other features.
To find the number of levels in any image follow this equation:
MaximumLevels = ceil( log( max(pimage->Width, pimage->Height)) / log(2));
The command will consider values larger than 10000 for contrast as 10000. If the user used a contrast of 0, then image contrast will not be improved.
Best results are obtained if contrast is in the range of 15 percent ~ 30 percent. The larger the value the stronger the enhancement will be. Any stronger enhancement than 30 percent will reveal noise and no new enhancement will be noticed.
The user can further enhance the image with:
- edge enhancements (use MultiscaleEnhancementCommandFlags.EdgeEnhancement) and/or
- latitude reduction (use MultiscaleEnhancementCommandFlags.LatitudeReduction)
The edge levels, edge coefficient, latitude levels and latitude coefficient values are available for advanced users. Using -1 would give the maximum enhancements.
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 Changing Brightness and Contrast.

Example

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

Public Sub MultiScaleEnhancementCommandExample()
   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 MultiscaleEnhancementCommand = New MultiscaleEnhancementCommand
   command.Contrast = 2000
   command.EdgeLevels = 4
   command.EdgeCoefficient = -1
   command.LatitudeLevels = 0
   command.LatitudeCoefficient = 0
   command.Type = MultiscaleEnhancementCommandType.Gaussian
   command.Flags = MultiscaleEnhancementCommandFlags.EdgeEnhancement
   ' Apply multiscale enhancement
   command.Run(leadImage)

End Sub

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

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

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

      // Prepare the command
      MultiscaleEnhancementCommand command = new MultiscaleEnhancementCommand();
      command.Contrast = 2000;
      command.EdgeLevels = 4;
      command.EdgeCoefficient = -1;
      command.LatitudeLevels = 0;
      command.LatitudeCoefficient = 0;
      command.Type = MultiscaleEnhancementCommandType.Gaussian;
      command.Flags = MultiscaleEnhancementCommandFlags.EdgeEnhancement;
      // Apply multiscale enhancement
      command.Run(image);

   }

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

[TestMethod]
public async Task MultiScaleEnhancementCommandExample()
{
   // 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
   MultiscaleEnhancementCommand command = new MultiscaleEnhancementCommand();
   command.Contrast = 2000;
   command.EdgeLevels = 4;
   command.EdgeCoefficient = -1;
   command.LatitudeLevels = 0;
   command.LatitudeCoefficient = 0;
   command.Type = MultiscaleEnhancementCommandType.Gaussian;
   command.Flags = MultiscaleEnhancementCommandFlags.EdgeEnhancement;
   // Apply multiscale enhancement
   command.Run(image);

}

public void MultiScaleEnhancementCommandExample(RasterImage image, Stream outStream)
{
   // Prepare the command
   MultiscaleEnhancementCommand command = new MultiscaleEnhancementCommand();
   command.Contrast = 2000;
   command.EdgeLevels = 4;
   command.EdgeCoefficient = -1;
   command.LatitudeLevels = 0;
   command.LatitudeCoefficient = 0;
   command.Type = MultiscaleEnhancementCommandType.Gaussian;
   command.Flags = MultiscaleEnhancementCommandFlags.EdgeEnhancement;
   // Apply multiscale enhancement
   command.Run(image);
   // Save result image
   RasterCodecs codecs = new RasterCodecs();
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24);
   image.Dispose();
}

Public Sub MultiScaleEnhancementCommandExample(ByVal image As RasterImage, ByVal outStream As Stream)
   ' Prepare the command
   Dim command As MultiscaleEnhancementCommand = New MultiscaleEnhancementCommand()
   command.Contrast = 2000
   command.EdgeLevels = 4
   command.EdgeCoefficient = -1
   command.LatitudeLevels = 0
   command.LatitudeCoefficient = 0
   command.Type = MultiscaleEnhancementCommandType.Gaussian
   command.Flags = MultiscaleEnhancementCommandFlags.EdgeEnhancement
   ' Apply multiscale enhancement
   command.Run(image)
   ' Save result image
   Dim codecs As RasterCodecs = New RasterCodecs()
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24)
   image.Dispose()
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