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FastFourierTransformCommand Constructor()
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Leadtools.ImageProcessing.Core Namespace > FastFourierTransformCommand Class > FastFourierTransformCommand Constructor : FastFourierTransformCommand Constructor()




Initializes a new FastFourierTransformCommand class object with default parameters.

Syntax

Visual Basic (Declaration) 
Public Function New()
Visual Basic (Usage)Copy Code
Dim instance As FastFourierTransformCommand()
C# 
public FastFourierTransformCommand()
Managed Extensions for C++ 
public: FastFourierTransformCommand();
C++/CLI 
public:
FastFourierTransformCommand();

Example

Visual BasicCopy Code
ImageProcessing.Core.FastFourierTransformCommand.FastFourierTransformConstructor
   Public Sub FastFourierTransformConstructorExample()
      RasterCodecs.Startup()
      Dim codecs As New RasterCodecs()
      codecs.ThrowExceptionsOnInvalidImages = True

      Dim leadImage As RasterImage = codecs.Load("C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\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 Rectangle
      rcRect = New Rectangle(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)

      RasterCodecs.Shutdown()
   End Sub
C#Copy Code
ImageProcessing.Core.FastFourierTransformCommand.FastFourierTransformConstructor 
      public void FastFourierTransformConstructorExample() 
      { 
         // Load an image 
         RasterCodecs.Startup(); 
         RasterCodecs codecs = new RasterCodecs(); 
         codecs.ThrowExceptionsOnInvalidImages = true; 
 
         RasterImage image = codecs.Load(@"C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\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); 
 
         Rectangle rcRect = new Rectangle(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); 
 
         RasterCodecs.Shutdown(); 
      }

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also