Top "Fft" questions

How to find the periodicity in data?

I have a dataset (an array) and I need to find the periodicity in it. How should I proceed? Somebody …

algorithm c#-3.0 fft

why DCT transform is preferred over other transforms in video/image compression

I went through how DCT (discrete cosine transform) is used in image and video compression standards. But why DCT only …

fft video-processing image-compression dct

Frequency Analysis in Python

I'm trying to use Python to retrieve the dominant frequencies of a live audio input. For the moment I am …

python numpy fft analysis blender

computing fft and ifft with fftw.h in C

Hi all I am using the fftw C libraries to compute the frequency spectrum for some signal processing applications on …

c signal-processing fft fftw

Pitch recognition of musical notes on a smart phone

With limited resources such as slower CPUs, code size and RAM, how best to detect the pitch of a musical …

audio signal-processing fft pitch-tracking

Interpret numpy.fft.fft2 output

My goal is to obtain a plot with the spatial frequencies of an image - kind of like doing a …

python numpy fft frequency-distribution

NAudio fft result gives intensity on all frequencies C#

I have a working implementation of NAudio's wasapi loopback recording and the FFT of the data. Most of the data …

c# fft naudio

How to apply Gaussian filter to DFT output in OpenCV

I want to create a Gaussian high-pass filter after determining the correct padding size (e.g., if image width and …

image opencv fft gaussian dft

What is the difference between numpy.fft.fft and numpy.fft.rfft?

The documentation says that np.fft.fft does this: Compute the one-dimensional discrete Fourier Transform. and np.fft.rfft does …

python arrays numpy signal-processing fft

Spectrum Analyzer with NAudio & WPFSoundVisualizationLib

I'm working on a C#4.0/WPF Real time Spectrum Analyser (as a base of another project). I use NAudio last …

c# audio fft naudio