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, 25 Apr 2002 BSD
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A C# complex number and FFT library.
Online Documentation
Included Library Demos
Source Code and Binaries Downloads
Change Log


  • Single and double precision complex number structs
  • 1D, 2D and 3D complex fast Fourier transform functions
  • 1D real symmetric fast Fourier transform function
  • Statistical functions for complex data sets (i.e. mean, variance, std. dev., RMS, etc...)
  • Optimized for speed

Online Documentation

Click here to browse the full contents of the library in MSDN style format.  Much thanks goes out to the creators of NDoc -- it was used to generate all the documentation files for this lbrary.

Included Library Demos

Image Filtering Sample

Shows how to convert an image from a spatial representation (i.e. picture on the left) to a frequency representation (picture on the right) using a 2D fast Fourier transform.

Mandelbrot Generator

Just shows how to use the complex number structs to calculate the classic Mandelbrot fractal around zero.  Pretty simple but still nice to look at.

 Source Code and Binaries Downloads

Complete Source Code (95 KB)
Includes all source, docs, binaries and demos for this library.

Demo Installer (101 KB)
NOTE: Installer requires that you have already installed Microsoft .NET Framework v1.0.  If you don't yet have it you can download it here.


Regular updates can be found here.

Change Log

  • March 8, 2002 - Initial Release
  • March 20, 2002 - Added the 2 demo applications
  • March 22, 2002 - Added ComplexStats class
  • March 27, 2002 - Updated webpage design


This article, along with any associated source code and files, is licensed under The BSD License


About the Author

Ben Houston
Web Developer
Canada Canada
No Biography provided

Comments and Discussions

QuestionCompact Framework error Pin
Oxcarz at 12-Jan-09 22:59
memberOxcarz12-Jan-09 22:59 
Questionextract pitch from a wav? Pin
Oxcarz at 27-Dec-08 23:17
memberOxcarz27-Dec-08 23:17 
GeneralComplex Conjugate FFT Pin
Ferry Mulyono at 28-Feb-07 21:11
memberFerry Mulyono28-Feb-07 21:11 
GeneralLicense Pin
Jonas Beckeman at 2-Jan-07 17:28
memberJonas Beckeman2-Jan-07 17:28 
GeneralProblems with backward transformation Pin
ComCoderCsharp at 27-Dec-06 4:32
memberComCoderCsharp27-Dec-06 4:32 
GeneralRe: Problems with backward transformation Pin
dssdss at 2-Mar-11 12:44
memberdssdss2-Mar-11 12:44 
GeneralRe: Problems with backward transformation Pin
Joe Best at 13-Aug-13 6:15
memberJoe Best13-Aug-13 6:15 
General- operator [modified] Pin
alisherr at 10-Nov-06 14:03
memberalisherr10-Nov-06 14:03 
GeneralFFT 1D Pin
Kenneth1985 at 25-Apr-06 9:01
memberKenneth198525-Apr-06 9:01 
GeneralRe: FFT 1D Pin
cbranje at 18-May-06 4:40
membercbranje18-May-06 4:40 
GeneralIndex was outside the bounds of the array problem Pin
christof.k at 27-Feb-06 23:11
memberchristof.k27-Feb-06 23:11 
GeneralRe: Index was outside the bounds of the array problem Pin
HansPfaff at 27-Jul-10 22:47
memberHansPfaff27-Jul-10 22:47 
GeneralRe: Index was outside the bounds of the array problem Pin
jinguman at 15-Feb-11 20:12
memberjinguman15-Feb-11 20:12 
thanks HansPfaff..

and in the source code module Fourier.cs at line 982, too
GeneralHard-coded data length limit Pin
Malcolm_Sharpe at 23-Sep-04 16:22
memberMalcolm_Sharpe23-Sep-04 16:22 
GeneralRe: Hard-coded data length limit Pin
Laurence Bunnage at 19-Apr-06 3:14
memberLaurence Bunnage19-Apr-06 3:14 
GeneralRe: Hard-coded data length limit Pin
melchizedek at 18-Oct-07 6:55
membermelchizedek18-Oct-07 6:55 
Questionoperator- problem? Pin
Vigrid at 21-May-03 13:46
memberVigrid21-May-03 13:46 
AnswerRe: operator- problem? Pin
Ben_Houston at 21-May-03 13:53
sussBen_Houston21-May-03 13:53 
GeneralRe: operator- problem? Pin
Vigrid at 21-May-03 15:10
memberVigrid21-May-03 15:10 
GeneralSpeed Pin
okigan at 9-Oct-02 14:25
memberokigan9-Oct-02 14:25 
GeneralRe: Speed Pin
Christian Graus at 29-Mar-05 18:55
memberChristian Graus29-Mar-05 18:55 
GeneralRe: Speed Pin
okigan at 29-Mar-05 21:15
memberokigan29-Mar-05 21:15 
GeneralRe: Speed Pin
Ben Houston at 30-Mar-05 6:15
memberBen Houston30-Mar-05 6:15 
GeneralRe: Speed Pin
Christian Graus at 30-Mar-05 13:02
memberChristian Graus30-Mar-05 13:02 
GeneralNOTE: Use Alternative Source Download - bug in local copy Pin
Ben Houston at 20-May-02 13:13
memberBen Houston20-May-02 13:13 

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