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



Initializes a new FrequencyFilterCommand class object with default parameters.

Syntax

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

Example

Run the FrequencyFilterCommand on an image.

Visual BasicCopy Code
Public Sub FrequencyFilterConstructorExample()
   RasterCodecs.Startup()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True

   Dim leadImage As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "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 = New FourierTransformInformation(leadImage)
   ' Apply FFT.
   Dim command As FastFourierTransformCommand = New FastFourierTransformCommand(FTArray, FastFourierTransformCommandFlags.FastFourierTransform Or FastFourierTransformCommandFlags.Gray)
   command.Run(leadImage)

   Dim rcRect As Rectangle = New Rectangle(0, 0, leadImage.Width \ 2, leadImage.Height \ 2)
   Dim FreqCommand As FrequencyFilterCommand = New FrequencyFilterCommand
   FreqCommand.Flags = FrequencyFilterCommandFlags.InsideX Or FrequencyFilterCommandFlags.OutsideY
   FreqCommand.FourierTransformInformation = FTArray
   FreqCommand.Rectangle = rcRect

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

   RasterCodecs.Shutdown()
End Sub
C#Copy Code
public void FrequencyFilterConstructorExample() 
{ 
   // Load an image 
   RasterCodecs.Startup(); 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "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); 
   // Apply FFT. 
   FastFourierTransformCommand command = new FastFourierTransformCommand(ftArray, FastFourierTransformCommandFlags.FastFourierTransform |  FastFourierTransformCommandFlags.Gray);    
   command.Run(image); 
 
   Rectangle rcRect = new Rectangle(0, 0, image.Width / 2, image.Height / 2); 
   FrequencyFilterCommand freqCommand = new FrequencyFilterCommand(); 
   freqCommand.Flags = FrequencyFilterCommandFlags.InsideX | FrequencyFilterCommandFlags.InsideY; 
   freqCommand.FourierTransformInformation = ftArray; 
   freqCommand.Rectangle = rcRect; 
 
   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