Filters the frequency harmonics data produced by a Fourier Transform method using a range rectangle.
Object Model
Syntax
Visual Basic (Declaration) | |
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Public Class FrequencyFilterCommand |
C# | |
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public class FrequencyFilterCommand |
Managed Extensions for C++ | |
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public __gc class FrequencyFilterCommand |
C++/CLI | |
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public ref class FrequencyFilterCommand |
Example
Visual Basic | Copy Code |
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ImageProcessing.Core.FrequencyFilterCommand
Public Sub FrequencyFilterCommandExample()
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")
Dim sizecommand As SizeCommand = New SizeCommand(256, 256, RasterSizeFlags.Bicubic)
sizecommand.Run(leadImage)
Dim FTArray As FourierTransformInformation = New FourierTransformInformation(leadImage)
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(FTArray, rcRect, FrequencyFilterCommandFlags.InsideX Or FrequencyFilterCommandFlags.OutsideY)
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 |
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ImageProcessing.Core.FrequencyFilterCommand public void FrequencyFilterCommandExample() { // 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, Leadtools.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(FTArray, rcRect, FrequencyFilterCommandFlags.InsideX | FrequencyFilterCommandFlags.InsideY); FastFourierTransformCommand InvCommand = new FastFourierTransformCommand(FTArray, FastFourierTransformCommandFlags.InverseFastFourierTransform | FastFourierTransformCommandFlags.Gray | FastFourierTransformCommandFlags.Scale | FastFourierTransformCommandFlags.Both); InvCommand.Run(image); RasterCodecs.Shutdown(); } |
Remarks
Inheritance Hierarchy
System.Object
Leadtools.ImageProcessing.Core.FrequencyFilterCommand
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