Top "Fft" questions

FFT for Spectrograms in Python

How would I go about using Python to read the frequency peaks from a WAV PCM file and then be …

python image graphics audio fft

Getting Fourier Transform from Phase and Magnitude - Matlab

The magnitude and phase of a fourier transform F are defined as: Mag = sqrt(Real(F)^2 + Imaginary(F)^2) and Phase = …

matlab image-processing signal-processing fft

How to get frequency from fft result?

I have recorded an array[1024] of data from my mic on my Android phone, passed it through a 1D forward …

java android fft pcm

FFT-based 2D convolution and correlation in Python

Is there a FFT-based 2D cross-correlation or convolution function built into scipy (or another popular library)? There are functions like …

python image numpy signal-processing fft

Fast Fourier Transform

I need to multiply two polynomials each having small integral coefficients. I need a fast FFT routine in C/C++ …

c++ c signal-processing fft dft

Invertible STFT and ISTFT in Python

Is there any general-purpose form of short-time Fourier transform with corresponding inverse transform built into SciPy or NumPy or whatever? …

python scipy fft signal-processing

FFT real/imaginary/abs parts interpretation

I'm currently learning about discret Fourier transform and I'm playing with numpy to understand it better. I tried to plot …

numpy signal-processing fft complex-numbers dft

how can the noise be removed from a recorded sound,using fft in MATLAB?

I want to remove noises from a recorded sound and make the fft of it finding fundamental frequencies of that …

matlab signal-processing fft audio-recording frequency-analysis

Matlab Low Pass filter using fft

I implemented a simple low pass filter in matlab using a forward and backward fft. It works in principle, but …

matlab filtering fft lowpass-filter

Doing FFT in realtime

I want to do the FFT of an audio signal in real time, meaning while the person is speaking in …

c real-time signal-processing fft