It looks like you're new here. If you want to get involved, click one of these buttons!

- 140.8K All Categories
- 103.7K Programming Languages
- 6.5K Assembler Developer
- 1.9K Basic
- 40K C and C++
- 2.9K C#
- 7.9K Delphi and Kylix
- 4 Haskell
- 9.7K Java
- 4.1K Pascal
- 1.3K Perl
- 2K PHP
- 546 Python
- 37 Ruby
- 4.4K VB.NET
- 1.6K VBA
- 20.8K Visual Basic
- 2.6K Game programming
- 315 Console programming
- 90 DirectX Game dev
- 1 Minecraft
- 112 Newbie Game Programmers
- 2 Oculus Rift
- 9K Applications
- 1.8K Computer Graphics
- 740 Computer Hardware
- 3.4K Database & SQL
- 535 Electronics development
- 1.6K Matlab
- 628 Sound & Music
- 257 XML Development
- 3.3K Classifieds
- 199 Co-operative Projects
- 198 For sale
- 190 FreeLance Software City
- 1.9K Jobs Available
- 603 Jobs Wanted
- 209 Wanted
- 2.9K Microsoft .NET
- 1.8K ASP.NET
- 1.1K .NET General
- 3.4K Miscellaneous
- 8 Join the Team
- 354 Comments on this site
- 69 Computer Emulators
- 2.1K General programming
- 187 New programming languages
- 627 Off topic board
- 200 Mobile & Wireless
- 72 Android
- 126 Palm Pilot
- 338 Multimedia
- 154 Demo programming
- 184 MP3 programming
- Bash scripts
- 27 Cloud Computing
- 53 FreeBSD
- 1.7K LINUX programming
- 370 MS-DOS
- Shell scripting
- 321 Windows CE & Pocket PC
- 4.1K Windows programming
- 940 Software Development
- 417 Algorithms
- 68 Object Orientation
- 91 Project Management
- 95 Quality & Testing
- 268 Security
- 7.7K WEB-Development
- 1.8K Active Server Pages
- 61 AJAX
- 4 Bootstrap Themes
- 55 CGI Development
- 28 ColdFusion
- 224 Flash development
- 1.4K HTML & WEB-Design
- 1.4K Internet Development
- 2.2K JavaScript
- 37 JQuery
- 304 WEB Servers
- 150 WEB-Services / SOAP

hadipardis
Member Posts: **134**

Hi Dear All

I need a freeware FFT (Fast Fourier Transform) Component or Unit to perform a 2D-FFT on an arbitrary input image!

Can anyone help me?

Cheers

Bye

I need a freeware FFT (Fast Fourier Transform) Component or Unit to perform a 2D-FFT on an arbitrary input image!

Can anyone help me?

Cheers

Bye

Terms of use / Privacy statement / Publisher: Lars Hagelin

Programmers Heaven articles / Programmers Heaven files / Programmers Heaven uploaded content / Programmers Heaven C Sharp ebook / Operated by CommunityHeaven

© 1997-2015 Programmersheaven.com - All rights reserved.

## Comments

6,349: I need a freeware FFT (Fast Fourier Transform) Component or Unit to perform a 2D-FFT on an arbitrary input image!

: Can anyone help me?

: Cheers

: Bye

:

Use google to find them. There are several good ones on the net, which include their full source and are freeware.

134: : I need a freeware FFT (Fast Fourier Transform) Component or Unit to perform a 2D-FFT on an arbitrary input image!

: : Can anyone help me?

: : Cheers

: : Bye

: :

: Use google to find them. There are several good ones on the net, which include their full source and are freeware.

:

Thanks Dear Zibadian. But unfortunately I could not find any good one.

Can you show me some of them?

Bye

6,349: : : I need a freeware FFT (Fast Fourier Transform) Component or Unit to perform a 2D-FFT on an arbitrary input image!

: : : Can anyone help me?

: : : Cheers

: : : Bye

: : :

: : Use google to find them. There are several good ones on the net, which include their full source and are freeware.

: :

: Thanks Dear Zibadian. But unfortunately I could not find any good one.

: Can you show me some of them?

: Bye

:

Here is a site which lists several other sources: http://homepages.borland.com/efg2lab/Library/Delphi/MathFunctions/Engineering.htm#DSP

It also has several sources available. I myself use a variant of the dsxfft component.

134: : : : I need a freeware FFT (Fast Fourier Transform) Component or Unit to perform a 2D-FFT on an arbitrary input image!

: : : : Can anyone help me?

: : : : Cheers

: : : : Bye

: : : :

: : : Use google to find them. There are several good ones on the net, which include their full source and are freeware.

: : :

: : Thanks Dear Zibadian. But unfortunately I could not find any good one.

: : Can you show me some of them?

: : Bye

: :

: Here is a site which lists several other sources: http://homepages.borland.com/efg2lab/Library/Delphi/MathFunctions/Engineering.htm#DSP

: It also has several sources available. I myself use a variant of the dsxfft component.

:

But when I try to compile or install TFastFourier component in the DsxFastFourier.pas (dsxfft.zip in Delphi 6) I got the following error:

line 68: published property 'TransformedData' cannot be of type array!

Please note that in line 68 of this file, there is a published property as follows:

property TransformedData[idx:integer]:TComplex read ....

Now, How I can compile and install it?

Thanks

6,349: : : : : I need a freeware FFT (Fast Fourier Transform) Component or Unit to perform a 2D-FFT on an arbitrary input image!

: : : : : Can anyone help me?

: : : : : Cheers

: : : : : Bye

: : : : :

: : : : Use google to find them. There are several good ones on the net, which include their full source and are freeware.

: : : :

: : : Thanks Dear Zibadian. But unfortunately I could not find any good one.

: : : Can you show me some of them?

: : : Bye

: : :

: : Here is a site which lists several other sources: http://homepages.borland.com/efg2lab/Library/Delphi/MathFunctions/Engineering.htm#DSP

: : It also has several sources available. I myself use a variant of the dsxfft component.

: :

: But when I try to compile or install TFastFourier component in the DsxFastFourier.pas (dsxfft.zip in Delphi 6) I got the following error:

: line 68: published property 'TransformedData' cannot be of type array!

: Please note that in line 68 of this file, there is a published property as follows:

: property TransformedData[idx:integer]:TComplex read ....

: Now, How I can compile and install it?

: Thanks

:

Change the TransfromedData into a public property.

134: : : : : : I need a freeware FFT (Fast Fourier Transform) Component or Unit to perform a 2D-FFT on an arbitrary input image!

: : : : : : Can anyone help me?

: : : : : : Cheers

: : : : : : Bye

: : : : : :

: : : : : Use google to find them. There are several good ones on the net, which include their full source and are freeware.

: : : : :

: : : : Thanks Dear Zibadian. But unfortunately I could not find any good one.

: : : : Can you show me some of them?

: : : : Bye

: : : :

: : : Here is a site which lists several other sources: http://homepages.borland.com/efg2lab/Library/Delphi/MathFunctions/Engineering.htm#DSP

: : : It also has several sources available. I myself use a variant of the dsxfft component.

: : :

: : But when I try to compile or install TFastFourier component in the DsxFastFourier.pas (dsxfft.zip in Delphi 6) I got the following error:

: : line 68: published property 'TransformedData' cannot be of type array!

: : Please note that in line 68 of this file, there is a published property as follows:

: : property TransformedData[idx:integer]:TComplex read ....

: : Now, How I can compile and install it?

: : Thanks

: :

: Change the TransfromedData into a public property.

:

Hi!

Thank you for your help. I was installed this component successfully.

But I have a problem for using this component.

I wrote the following code:

//---------------------------------------------------------------------

procedure TForm1.DSXFastFourier1GetData(index: Integer;

var Value: TComplex);

begin

// Sample Count=4 and so I defind input data as [0 1 2 3]

Value.Real:=index;

Value.Imag:=0;

end;

procedure TForm1.Button1Click(Sender: TObject);

var i:integer;

begin

DSXFastFourier1.fft;

for i:=1 to 4 do //Sample Count=4

begin

showmessage(floattostr(DSXFastFourier1.TransformedData[i].real)+'+i'+floattostr(DSXFastFourier1.TransformedData[i].imag));

end;

end;

//---------------------------------------------------------------------

The above code is executed when Button1 clicked. After this

action, the TDsxFastFourier.OnGetData to obtain input data will occured.

(Input Data= [ 0 1 2 3] and SampleCount=4)

After this stage, the output result will display by showmessage

procedure.

But the output of this component is wrong. For instance you

can test it in Matlab by the following code:

x=[0 1 2 3];

f=fft(x);

Now, What is the problem?