FastFourierTransformCommand Constructor()

Initializes a new FastFourierTransformCommand class object with default parameters.

Syntax

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

public FastFourierTransformCommand()

'Declaration
 
Public Function New()

'Usage
 
Dim instance As New FastFourierTransformCommand()

public FastFourierTransformCommand()

function FastFourierTransformCommand()

public:
FastFourierTransformCommand();

Example

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

Public Sub FastFourierTransformConstructorExample()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True

   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"))

   ' Prepare the command
   ' Resize the image to make sure the image's dimensions are power of two.
   Dim sizeCmd As SizeCommand = New SizeCommand(256, 256, RasterSizeFlags.Bicubic)
   sizeCmd.Run(leadImage)

   Dim ftArray As FourierTransformInformation
   ftArray = New FourierTransformInformation(leadImage)

   Dim data() As Complex
   data = ftArray.Data
   Dim width As Integer = ftArray.Width
   Dim height As Integer = ftArray.Height

   ' Apply FFT.
   Dim command As FastFourierTransformCommand
   command = New FastFourierTransformCommand
   command.FourierTransformInformation = ftArray
   command.Flags = FastFourierTransformCommandFlags.FastFourierTransform Or FastFourierTransformCommandFlags.Gray
   command.Run(leadImage)

   Dim rcRect As LeadRect
   rcRect = New LeadRect(0, 0, CType((leadImage.Width / 2), Integer), CType((leadImage.Height / 2), Integer))
   Dim freqCommand As FrequencyFilterCommand
   freqCommand = New FrequencyFilterCommand(ftArray, rcRect, FrequencyFilterCommandFlags.InsideX Or FrequencyFilterCommandFlags.OutsideY)

   Dim invCommand As FastFourierTransformCommand
   invCommand = New FastFourierTransformCommand(ftArray, FastFourierTransformCommandFlags.InverseFastFourierTransform Or FastFourierTransformCommandFlags.Gray Or FastFourierTransformCommandFlags.Scale Or FastFourierTransformCommandFlags.Both)
   invCommand.Run(leadImage)

End Sub

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

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

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

      // Prepare the command
      // Resize the image to make sure the image's dimensions are power of two.
      SizeCommand sizeCommand = new SizeCommand(256, 256, RasterSizeFlags.Bicubic);
      sizeCommand.Run(image);

      FourierTransformInformation ftArray = new FourierTransformInformation(image);
      Complex[] data = ftArray.Data;
      int width = ftArray.Width;
      int height = ftArray.Height;

      // Apply FFT.
      FastFourierTransformCommand command = new FastFourierTransformCommand();
      command.FourierTransformInformation = ftArray;
      command.Flags = FastFourierTransformCommandFlags.FastFourierTransform |  FastFourierTransformCommandFlags.Gray;
      command.Run(image);

      LeadRect rcRect = new LeadRect(0, 0, image.Width / 2, image.Height / 2);
      FrequencyFilterCommand freqCommand = new FrequencyFilterCommand(ftArray, rcRect, FrequencyFilterCommandFlags.InsideX | FrequencyFilterCommandFlags.OutsideY);

      FastFourierTransformCommand invCommand = new FastFourierTransformCommand(ftArray, FastFourierTransformCommandFlags.InverseFastFourierTransform |  FastFourierTransformCommandFlags.Gray | FastFourierTransformCommandFlags.Scale | FastFourierTransformCommandFlags.Both);
      invCommand.Run(image);

   }

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

function FastFourierTransformConstructorExample()
{
   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) {
         // Resize the image to make sure the image's dimensions are power of two.
         var sizeCommand = new Leadtools.ImageProcessing.SizeCommand(256, 256, Leadtools.RasterSizeFlags.bicubic);
         sizeCommand.run(image);
         
         var ftArray = new FourierTransformInformation(image);
         var data = ftArray.Data;
         var width = ftArray.width;
         var height = ftArray.height;
                  
         // Apply FFT.
         var command = new FastFourierTransformCommand();
         command.fourierTransformInformation = ftArray;
         command.flags = FastFourierTransformCommandFlags.fastFourierTransform |  FastFourierTransformCommandFlags.gray;
         command.run(image);
                  
         var rcRect = Leadtools.LeadRectHelper.create(0, 0, image.width / 2, image.height / 2);
         var freqCommand = new FrequencyFilterCommand(ftArray, rcRect, FrequencyFilterCommandFlags.insideX | FrequencyFilterCommandFlags.outsideY);
                     
         var invCommand = new FastFourierTransformCommand(ftArray, FastFourierTransformCommandFlags.inverseFastFourierTransform |  FastFourierTransformCommandFlags.gray | FastFourierTransformCommandFlags.scale | FastFourierTransformCommandFlags.both);
         invCommand.run(image);
      }
   });
}

[TestMethod]
public async Task FastFourierTransformConstructorExample()
{
   // 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
   // Resize the image to make sure the image's dimensions are power of two.
   SizeCommand sizeCommand = new SizeCommand(256, 256, RasterSizeFlags.Bicubic);
   sizeCommand.Run(image);

   FourierTransformInformation ftArray = new FourierTransformInformation(image);
   Complex[] data = ftArray.Data;
   int width = ftArray.Width;
   int height = ftArray.Height;

   // Apply FFT.
   FastFourierTransformCommand command = new FastFourierTransformCommand();
   command.FourierTransformInformation = ftArray;
   command.Flags = FastFourierTransformCommandFlags.FastFourierTransform |  FastFourierTransformCommandFlags.Gray;
   command.Run(image);

   LeadRect rcRect = LeadRectHelper.Create(0, 0, image.Width / 2, image.Height / 2);
   FrequencyFilterCommand freqCommand = new FrequencyFilterCommand(ftArray, rcRect, FrequencyFilterCommandFlags.InsideX | FrequencyFilterCommandFlags.OutsideY);

   FastFourierTransformCommand invCommand = new FastFourierTransformCommand(ftArray, FastFourierTransformCommandFlags.InverseFastFourierTransform |  FastFourierTransformCommandFlags.Gray | FastFourierTransformCommandFlags.Scale | FastFourierTransformCommandFlags.Both);
   invCommand.Run(image);

}

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

FastFourierTransformCommand Class
FastFourierTransformCommand Members
Overload List