New answers tagged filtering
1
vote
Savitzky-Golay filtering (not smoothing) in real time
I found the answer from playing around. They are easily computed with scipy.savgol_coeffs e.g.
...
0
votes
Filtering out correlated data from dropouts
If the dropouts are truly time coincident can't you just apply a linear discriminator to the bottom plot there? Figure out where the threshold is, is it a vertical line at 70.355? Or a somewhat ...
1
vote
Accepted
Butterworth filter cutoff attenuation is not exactly 0.707(-3dB)
Filter needs time to settle down. This settling process altered the beginning of time domain data and created the small difference. I took the second half of time domain filtered data and got a ratio ...
1
vote
Butterworth filter cutoff attenuation is not exactly 0.707(-3dB)
What you see there are margin issues. By not applying a window function to your signal before the FFT, you effectively convolute your spectrum with an $\text{si}$ function, which leads to artifacts ...
Top 50 recent answers are included
Related Tags
filtering × 305filters × 68
matlab × 50
image-processing × 37
filter-design × 28
noise × 25
lowpass-filter × 21
discrete-signals × 19
convolution × 19
python × 18
signal-analysis × 16
digital-filters × 15
fft × 13
sampling × 13
kalman-filters × 13
audio × 12
bandpass × 11
fourier-transform × 10
finite-impulse-response × 10
infinite-impulse-response × 10
denoising × 10
butterworth × 9
smoothing × 8
frequency-spectrum × 7
dft × 7