Tag Archive for 'fft'

ASFFT update

March 15, 2010
posted to Actionscript, Examples and works
. 11 Comments

ASFFT project got some updates:

  • 1 dimensional FFT added
  • FFT Spectrum analyzer class added
  • updated methods that lets you work with FFT data via BitmapData object

Special thanx to Mario Klingemann for the help with the correction of setDataBitmapData and getDataBitmapData methods.

See Wiki page for more info on project

Demo of 1D FFT and FFTSpectrumAnalyzer usage
Pitch Shifter demo that uses FFT to transform sound data

Fast Fourier Transform for Flash

March 9, 2010
posted to Actionscript, Examples, Tools and works
. 25 Comments
FFT simple usage example

There is smth new I would like to share with Flash community: ASFFT Project. Well project is too loud name as far as it is only small library that allows users to decompose images using Fast Fourier Transform in to Real and Imaginary parts. But if you dig more in to the title you will find lots of amazing possibilities it brings to you. The problem is that it is pretty slow and can’t be used on processing video frames for example but it is fast enough to do different image manipulations without freezing Flash Player.

The lib will contain 2 classes “FFT2D” and “FFT”. First one is to work with two dimensional data mostly presented as images. The second one is for streaming (or not) one dimensional data. Usually used in sound signal manipulations/transformation.
At this very moment only FFT2D class available. I will add one dimensional FFT class in near future.

Simple demo example of FFT usage
Project page at Google Code