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FourierTransformInformation Class

Summary

The FourierTransformInformation class contains information about the complex 2D array that will hold the frequency components of the image.

Syntax

Java

Objective-C

WinRT C#

C++

public class FourierTransformInformation : IDisposable

Public Class FourierTransformInformation  
   Implements System.IDisposable

public sealed class FourierTransformInformation : IClosable

@interface LTFourierTransformInformation : NSObject

public class FourierTransformInformation

function Leadtools.ImageProcessing.Core.FourierTransformInformation()

public ref class FourierTransformInformation : public System.IDisposable

Remarks

The Fourier Transform commands return an instance of FourierTransformInformation. This object holds all the frequency domain information (harmonics information). Each Data element holds the information about the harmonic frequency at its location. This information is an instance of the Complex structure, which contains the real and imaginary values of the harmonic.

To obtain the magnitude, take the square root of the sum of the squared real and imaginary values.

To calculate the phase, find the arctan of (imaginary/real).

To get/set the value of a harmonic at a specific location, use the GetDataOf / SetData methods. (0,0) is the first element.

The frequency harmonics are sorted as follows:

LowX LowY---------HighXLowY----------LowXLowY 
|                     |                  | 
|                     |                  | 
|                     |                  | 
|                     |                  | 
|                     |                  | 
|                     |                  | 
LowXHighY---------HighXHighY---------LowXHighY 
 
|                     |                  | 
|                     |                  | 
|                     |                  | 
|                     |                  | 
|                     |                  | 
LowXLowY----------HighXLowY----------LowXLowY