MultiscaleEnhancementCommand Class

Summary

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.

Syntax

Objective-C

C++

Java

public class MultiscaleEnhancementCommand : RasterCommand

Public Class MultiscaleEnhancementCommand  
   Inherits RasterCommand

@interface LTMultiscaleEnhancementCommand : LTRasterCommand

public class MultiscaleEnhancementCommand extends RasterCommand

public ref class MultiscaleEnhancementCommand : public RasterCommand

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

Run the MultiscaleEnhancementCommand on an image.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
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"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
 
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

c#[Silverlight C# Example] 
using Leadtools; 
using Leadtools.Examples; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
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(); 
} 
vb[Silverlight VB Example] 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
 
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