FourierTransformInformation Property

Summary

Gets or set the FourierTransformInformation object that contains information about the FourierTransformCommand. The Data property of the FourierTransformInformation object is a two-dimensional array that holds the frequency components of the image.

Syntax

Objective-C

C++/CLI

Python

public FourierTransformInformation FourierTransformInformation { get; set; }

@property (nonatomic, strong) LTFourierTransformInformation *fourierTransformInformation;

public: 
property FourierTransformInformation^ FourierTransformInformation { 
   FourierTransformInformation^ get(); 
   void set (    FourierTransformInformation^ ); 
}

FourierTransformInformation # get and set (DiscreteFourierTransformCommand)

Property Value

FourierTransformInformation object. The Data property of the FourierTransformInformation object is a two-dimensional array that holds the frequency components of the image. Its size must be the same as the image. This array is filled by the command when the DiscreteFourierTransformCommandFlags.DiscreteFourierTransform flag has been set, and it must be sent to the command to construct the image from it when the DiscreteFourierTransformCommandFlags.InverseDiscreteFourierTransform flag has been set.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void DiscreteFourierTransformCommandExample() 
{ 
   // 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 command = new DiscreteFourierTransformCommand(); 
 
   command.FourierTransformInformation = FTArray; 
   command.Range = rcRange; 
   command.Flags = DiscreteFourierTransformCommandFlags.DiscreteFourierTransform | 
      DiscreteFourierTransformCommandFlags.Gray | 
      DiscreteFourierTransformCommandFlags.Range | 
      DiscreteFourierTransformCommandFlags.InsideX | 
      DiscreteFourierTransformCommandFlags.InsideY; 
   //Apply DFT. 
 
   FourierTransformDisplayCommand disCommand = new FourierTransformDisplayCommand(); 
   disCommand.Flags = FourierTransformDisplayCommandFlags.Log | FourierTransformDisplayCommandFlags.Magnitude; 
   disCommand.FourierTransformInformation = command.FourierTransformInformation; 
   // plot frequency magnitude 
   disCommand.Run(image); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

DiscreteFourierTransformCommand Class

DiscreteFourierTransformCommand Members

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Help Version 22.0.2023.11.1

Leadtools.ImageProcessing.Core Assembly

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