DiscreteFourierTransformCommand Constructor(FourierTransformInformation,LeadRect,DiscreteFourierTransformCommandFlags)

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Java
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public DiscreteFourierTransformCommand( 
   FourierTransformInformation fourierTransformInformation,
   LeadRect range,
   DiscreteFourierTransformCommandFlags flags
)

'Declaration
 
Public Function New( _
   ByVal fourierTransformInformation As FourierTransformInformation, _
   ByVal range As LeadRect, _
   ByVal flags As DiscreteFourierTransformCommandFlags _
)

'Usage
 
Dim fourierTransformInformation As FourierTransformInformation
Dim range As LeadRect
Dim flags As DiscreteFourierTransformCommandFlags
 
Dim instance As New DiscreteFourierTransformCommand(fourierTransformInformation, range, flags)

public DiscreteFourierTransformCommand( 
   FourierTransformInformation fourierTransformInformation,
   LeadRect range,
   DiscreteFourierTransformCommandFlags flags
)

function DiscreteFourierTransformCommand( 
   fourierTransformInformation ,
   range ,
   flags 
)

public:
DiscreteFourierTransformCommand( 
   FourierTransformInformation^ fourierTransformInformation,
   LeadRect range,
   DiscreteFourierTransformCommandFlags flags
)

Parameters

fourierTransformInformation: FourierTransformInformation structure. The Data property of the FourierTransformInformation object is a two-dimensional array that holds the frequency components of the image. Its size must be the same as the image. This array is filled by the command when DiscreteFourierTransformCommandFlags.DiscreteFourierTransform has been set, and it must be sent to the command to construct the image from it when DiscreteFourierTransformCommandFlags.InverseDiscreteFourierTransform has been set.
range: Specifies the frequency range to be computed when DiscreteFourierTransformCommandFlags.InverseDiscreteFourierTransform flag is set. It specifies the frequency range that will be used in the image construction when DiscreteFourierTransformCommandFlags.InverseDiscreteFourierTransform is set. The left value refers to the minimum X harmonic, the right refers to the maximum X harmonic, the top refers to the minimum Y harmonic and the bottom refers to the maximum Y harmonic. The maximum X harmonic equals (Width -1) and the maximum Y harmonic equals (Height -1). The minimum X harmonic equals 0 and the minimum Y harmonic equals 0.
flags: Flags that indicate the transformation type, operation channel, frequency data type used to reconstruct the image, the clipping type, the used or computed frequencies range, the operation on the specified X harmonics range, and the operation on the specified Y harmonics range. You can use a bitwise OR (|) to specify one flag from each group.

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

Copy Code

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

Public Sub DiscreteFourierTransformConstructorExample()
   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 FTArray As FourierTransformInformation
   FTArray = New FourierTransformInformation(leadImage)
   Dim rcRange As LeadRect
   rcRange = New LeadRect(0, 0, CType((leadImage.Width / 4), Integer), CType((leadImage.Height / 2), Integer))

   Dim command As DiscreteFourierTransformCommand
   command = New DiscreteFourierTransformCommand(FTArray, rcRange, DiscreteFourierTransformCommandFlags.DiscreteFourierTransform Or DiscreteFourierTransformCommandFlags.Gray Or DiscreteFourierTransformCommandFlags.Range Or DiscreteFourierTransformCommandFlags.InsideX Or DiscreteFourierTransformCommandFlags.OutsideY)
   ' Apply DFT.
   command.Run(leadImage)

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.Core;

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

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

   // Prepare the command
   FourierTransformInformation FTArray = new FourierTransformInformation(image);
   LeadRect rcRange = new LeadRect(0, 0, image.Width / 4, image.Height / 2);

   DiscreteFourierTransformCommand command = new DiscreteFourierTransformCommand(FTArray, rcRange , DiscreteFourierTransformCommandFlags.DiscreteFourierTransform | DiscreteFourierTransformCommandFlags.Gray | DiscreteFourierTransformCommandFlags.Range | DiscreteFourierTransformCommandFlags.InsideX | DiscreteFourierTransformCommandFlags.OutsideY);
   // Apply DFT.
   command.Run(image);

}

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

function DiscreteFourierTransformConstructorExample()
{
   var codecs = new Leadtools.Codecs.RasterCodecs();
   codecs.throwExceptionsOnInvalidImages = true;

   // Load the image
   var srcFileName = "Assets\\Image1.cmp";
   return Tools.AppInstallFolder().getFileAsync(srcFileName).then(function (loadFile) {
      return codecs.loadAsync(Leadtools.LeadStreamFactory.create(loadFile));
   }).then(function (image){
      // Prepare the command
      with (Leadtools.ImageProcessing.Core) {
         var FTArray = new FourierTransformInformation(image);
         var rcRange = Leadtools.LeadRectHelper.create(0, 0, image.width / 4, image.height / 2);
                 
         var command = new DiscreteFourierTransformCommand(FTArray, rcRange , DiscreteFourierTransformCommandFlags.discreteFourierTransform | DiscreteFourierTransformCommandFlags.gray | DiscreteFourierTransformCommandFlags.range | DiscreteFourierTransformCommandFlags.insideX | DiscreteFourierTransformCommandFlags.outsideY);
         // Apply DFT.
         command.run(image);
      }
   });
}

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Core;

      
public async Task DiscreteFourierTransformConstructorExample()
{
   // 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
   FourierTransformInformation FTArray = new FourierTransformInformation(image);
   LeadRect rcRange = LeadRectHelper.Create(0, 0, image.Width / 4, image.Height / 2);

   DiscreteFourierTransformCommand command = new DiscreteFourierTransformCommand(FTArray, rcRange , DiscreteFourierTransformCommandFlags.DiscreteFourierTransform | DiscreteFourierTransformCommandFlags.Gray | DiscreteFourierTransformCommandFlags.Range | DiscreteFourierTransformCommandFlags.InsideX | DiscreteFourierTransformCommandFlags.OutsideY);
   // Apply DFT.
   command.Run(image);

}

Target Platforms

Reference

DiscreteFourierTransformCommand Class
DiscreteFourierTransformCommand Members
Overload List