All Questions
Tagged with preprocessing filters
9
questions
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Fiber Photometry (Fluorescence) Signal Preprocessing through Source Separation and Baseline Correction
I am working on preprocessing fiber photometry data. The data collection involves inserting fibers into an animal, where the reflection of specific wavelengths of light is captured. We collect two ...
1
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1
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181
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CWT: selection of scales and filtering
I am using CWT to obtain scalograms of ECG signals as the one below:
In my research, most articles contain a pre-processing step before performing CWT (that usually includes signal normalization and ...
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1
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409
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Creating Triangle Filters for Smoothing using Python
The 'binning' process consists in summing the energies (squared magnitude) within groups of adjacent FFT values. This will give you the total energy in a set of disjoint frequency bands.
A more ...
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2
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764
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My 3x3 Weighted Median Filter doesn't seem to be improving my image quality
In order to reduce noise in my training dataset,I attempted a WMF whose weights are shown in a 2-D array as follows(values finally get normalized by division by 15:
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176
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How to detect offset that changes along time in a signal?
I have an issue that has to do with detrending a signal. First, it seems my signals behaves a little unusual (for me, I think). Some signals starts with a quite large offset, then it seems to ...
3
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1
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1k
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Baseline correction for continuous EEG signals
I'm new to the topic so forgive the trivial question.
I am trying to understand data preprocessing for EEG signals. As I understand, after recording continuous EEG signals, they should be band-pass ...
- 131
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165
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FFT response for noisy signal, averaging the response and
I try to analyze a system's state with acceleration sensors by measuring the frequencies and amplitudes.
Since a cheap sensor is used, I have a noisy signal in the beginning (up to 40Hz - see below). ...
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1
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1
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2k
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Frequency analysis to determine low-pass cut off frequency
I collected some data for a practical application, where the signal represents force data obtained from an impact of a punch against a force plate attached to a quasi-rigid rig (it moves once the ...
5
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1
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178
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Find the relation between two noisy periodic signals of equal length
[Thank you, @leftaroundabout for your helpful comments to my related question. I'm trying to ask a less confusing question here.]
$0\leq\phi\leq 2\pi$ is a parameter that theoretically describes a ...
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