This command is used to display the results of a Fast Fourier Transform or a Discrete Fourier analysis as an image.
public class FourierTransformDisplayCommand : RasterCommand
Public Class FourierTransformDisplayCommand
Inherits Leadtools.Imageprocessing.Leadtools.ImageProcessing.RasterCommand
Implements Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand
public sealed class FourierTransformDisplayCommand : Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand
@interface LTFourierTransformDisplayCommand : LTRasterCommand
function Leadtools.ImageProcessing.Core.FourierTransformDisplayCommand()
public ref class FourierTransformDisplayCommand : public Leadtools.Imageprocessing.Leadtools.ImageProcessing.RasterCommand, Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand
This command is available in the Imaging Pro and above toolkits.
For more information, refer to Removing Noise.
Runs the FourierTransformDisplayCommand on an image, applies the Discrete Fourier Transform command to it, and displays the data.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Core;
public void FourierTransformDisplayCommandExample()
{
// Load an image
RasterCodecs codecs = new RasterCodecs();
codecs.ThrowExceptionsOnInvalidImages = true;
RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, @"ImageProcessingDemo\FourierTransform.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();
FourierTransformDisplayCommand command = new FourierTransformDisplayCommand();
DFTcommand.FourierTransformInformation = FTArray;
DFTcommand.Range = rcRange;
DFTcommand.Flags = DiscreteFourierTransformCommandFlags.DiscreteFourierTransform |
DiscreteFourierTransformCommandFlags.Gray |
DiscreteFourierTransformCommandFlags.Range |
DiscreteFourierTransformCommandFlags.InsideX |
DiscreteFourierTransformCommandFlags.InsideY;
// apply DFT
DFTcommand.Run(image);
command.Flags = FourierTransformDisplayCommandFlags.Log | FourierTransformDisplayCommandFlags.Magnitude;
command.FourierTransformInformation = FTArray;
//plot frequency magnitude.
command.Run(image);
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Core
Leadtools.Examples.Support.SetLicense()
Public Sub FourierTransformDisplayCommandExample()
Dim codecs As New RasterCodecs()
codecs.ThrowExceptionsOnInvalidImages = True
Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ImageProcessingDemo\\FourierTransform.jpg"))
' Prepare the command
Dim FTArray As FourierTransformInformation = New FourierTransformInformation(leadImage)
Dim rcRange As LeadRect = New LeadRect(0, 0, leadImage.Width - 1, leadImage.Height - 1)
Dim DFTcommand As DiscreteFourierTransformCommand = New DiscreteFourierTransformCommand
Dim command As FourierTransformDisplayCommand = New FourierTransformDisplayCommand
DFTcommand.FourierTransformInformation = FTArray
DFTcommand.Range = rcRange
DFTcommand.Flags = DiscreteFourierTransformCommandFlags.DiscreteFourierTransform _
Or DiscreteFourierTransformCommandFlags.Gray _
Or DiscreteFourierTransformCommandFlags.Range _
Or DiscreteFourierTransformCommandFlags.InsideX _
Or DiscreteFourierTransformCommandFlags.OutsideY
' apply DFT
DFTcommand.Run(leadImage)
command.Flags = FourierTransformDisplayCommandFlags.Log Or FourierTransformDisplayCommandFlags.Magnitude
command.FourierTransformInformation = FTArray
'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
FourierTransformDisplayCommand Members
Leadtools.ImageProcessing.Core Namespace
DiscreteFourierTransformCommand Class
Leadtools.ImageProcessing.Effects.AverageCommand
Leadtools.ImageProcessing.Effects.SpatialFilterCommand
Leadtools.ImageProcessing.Effects.BinaryFilterCommand
Leadtools.ImageProcessing.Effects.AddNoiseCommand
Leadtools.ImageProcessing.Color.IntensityDetectCommand
Leadtools.ImageProcessing.Color.ChangeHueSaturationIntensityCommand
Leadtools.ImageProcessing.Color.ColorThresholdCommand
Leadtools.ImageProcessing.Effects.DirectionEdgeStatisticalCommand
FastFourierTransformCommand Class
FourierTransformDisplayCommand Class
Leadtools.ImageProcessing.Effects.StatisticsInformationCommand
Leadtools.ImageProcessing.Effects.FeretsDiameterCommand
Leadtools.ImageProcessing.Effects.ObjectInformationCommand
Leadtools.ImageProcessing.Effects.RegionContourPointsCommand
Leadtools.ImageProcessing.Color.MathematicalFunctionCommand
Leadtools.ImageProcessing.SpecialEffects.RevEffectCommand
Leadtools.ImageProcessing.Color.SegmentCommand
SubtractBackgroundCommand Class
Leadtools.ImageProcessing.Effects.UserFilterCommand
Leadtools.ImageProcessing.SpecialEffects.FragmentCommand
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