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FourierTransformDisplayCommand Constructor(FourierTransformInformation,FourierTransformDisplayCommandFlags)
See Also  Example
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 Leadtools.ImageProcessing.Core.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 New FourierTransformDisplayCommand(fourierTransformInformation, 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

Runs the Leadtools.ImageProcessing.Core.FourierTransformDisplayCommand on an image, applies the Discrete Fourier Transform command to it, and displays the data.

Visual BasicCopy Code
Public Sub FourierTransformDisplayConstructorExample()
   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, 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)

End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
C#Copy Code
public void FourierTransformDisplayConstructorExample()
   {
      // 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 - 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);

   }

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

Requirements

Target Platforms: Silverlight 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)

See Also