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FourierTransformDisplayCommand Constructor(FourierTransformInformation,FourierTransformDisplayCommandFlags)
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Leadtools.ImageProcessing.Core Namespace > FourierTransformDisplayCommand Class > FourierTransformDisplayCommand Constructor : FourierTransformDisplayCommand Constructor(FourierTransformInformation,FourierTransformDisplayCommandFlags)




fourierTransformInformation
FourierTransformInformation structure. The Data property of the FourierTransformInformation object is a two-dimensional array that will hold the frequency components of the image. Its dimensions must be the same as the image dimensions.
flags
Flags that indicate the data to be shown and the plotting scale. You can use a bit-wise OR (|) to specify one flag from each group.
Initializes a new FourierTransformDisplayCommand class object with explicit parameters.

Syntax

Visual Basic (Declaration) 
Public Function New( _
   ByVal fourierTransformInformation As FourierTransformInformation, _
   ByVal flags As FourierTransformDisplayCommandFlags _
)
Visual Basic (Usage)Copy Code
Dim fourierTransformInformation As FourierTransformInformation
Dim flags As FourierTransformDisplayCommandFlags
 
Dim instance As FourierTransformDisplayCommand(fourierTransformInformation, flags)
Managed Extensions for C++ 
public: FourierTransformDisplayCommand( 
   FourierTransformInformation* fourierTransformInformation,
   FourierTransformDisplayCommandFlags flags
)
C++/CLI 
public:
FourierTransformDisplayCommand( 
   FourierTransformInformation^ fourierTransformInformation,
   FourierTransformDisplayCommandFlags flags
)

Parameters

fourierTransformInformation
FourierTransformInformation structure. The Data property of the FourierTransformInformation object is a two-dimensional array that will hold the frequency components of the image. Its dimensions must be the same as the image dimensions.
flags
Flags that indicate the data to be shown and the plotting scale. You can use a bit-wise OR (|) to specify one flag from each group.

Example

Visual BasicCopy Code
ImageProcessing.Core.FourierTransformDisplayCommand.FourierTransformDisplayConstructor
   Public Sub FourierTransformDisplayConstructorExample()
      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
      Dim ftArray As FourierTransformInformation
      ftArray = New FourierTransformInformation(leadImage)
      Dim rcRange As System.Drawing.Rectangle
      rcRange = New System.Drawing.Rectangle(0, 0, leadImage.Width - 1, leadImage.Height - 1)
      Dim dftCommand As DiscreteFourierTransformCommand
      dftCommand = New DiscreteFourierTransformCommand
      dftCommand.FourierTransformInformation = ftArray
      dftCommand.Range = rcRange
      dftCommand.Flags = DiscreteFourierTransformCommandFlags.DiscreteFourierTransform Or DiscreteFourierTransformCommandFlags.Gray Or DiscreteFourierTransformCommandFlags.Range Or DiscreteFourierTransformCommandFlags.InsideX Or DiscreteFourierTransformCommandFlags.InsideY
      ' apply DFT
      dftCommand.Run(leadImage)

      Dim command As FourierTransformDisplayCommand
      command = New FourierTransformDisplayCommand(ftArray, FourierTransformDisplayCommandFlags.Log Or FourierTransformDisplayCommandFlags.Magnitude)
      'plot frequency magnitude.
      command.Run(leadImage)

      RasterCodecs.Shutdown()
   End Sub
C#Copy Code
ImageProcessing.Core.FourierTransformDisplayCommand.FourierTransformDisplayConstructor 
      public void FourierTransformDisplayConstructorExample() 
      { 
         // 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 
         FourierTransformInformation ftArray = new FourierTransformInformation(image); 
         System.Drawing.Rectangle rcRange = new System.Drawing.Rectangle(0, 0, image.Width - 1, image.Height - 1); 
         DiscreteFourierTransformCommand dftCommand = new DiscreteFourierTransformCommand(); 
 
         dftCommand.FourierTransformInformation = ftArray; 
         dftCommand.Range = rcRange; 
         dftCommand.Flags = DiscreteFourierTransformCommandFlags.DiscreteFourierTransform |  
            DiscreteFourierTransformCommandFlags.Gray    |  
            DiscreteFourierTransformCommandFlags.Range   |  
            DiscreteFourierTransformCommandFlags.InsideX |  
            DiscreteFourierTransformCommandFlags.InsideY;  
         // apply DFT 
         dftCommand.Run(image); 
 
         FourierTransformDisplayCommand command = new FourierTransformDisplayCommand(ftArray, FourierTransformDisplayCommandFlags.Log | FourierTransformDisplayCommandFlags.Magnitude); 
         //plot frequency magnitude. 
         command.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