The peak-detection tag has no wiki summary.
3
votes
3answers
74 views
Removing unwanted peaks from signal
I have a signal which looks something like:
The 12 main round peaks is what I'd like to keep. However, the peak detection algorithm I apply is picking up the in-between noisy peaks. Any strategies ...
5
votes
2answers
190 views
What is the uHz-rotator algorithm?
According to this page, the Baudline software tool implements
...the uHz-rotator algorithm that operates in the complex domain to
calculate an extremely accurate estimate of the frequency.
...
1
vote
1answer
50 views
Amplitude calculation
I've got an array of different values representing the y-values in a plot:
...
9
votes
2answers
281 views
Finding zebra-like pattern in image (Detection of structured-light fringe centerline from photo)
I'm working in a project where fringes are projected against a subject, and a photo is taken. The task is to find the centerlines of the fringes, which represent, mathematically, the 3D curve of ...
4
votes
2answers
231 views
Remove negative slopes from signal
I'm very new to signal processing, and have been struggling this far. To cut to the chase, I've a rather messy signal measuring respiration using some chest bands and would like to focus my analysis ...
8
votes
1answer
787 views
Real time slope and peak detection and calculation
I have a signal that I sample at 500khz. I am trying to detect a rise, fall and the peak in the incoming data. The base of the peak could be for 250 usec or 2.5msec, amplitude could be 6db or 15db ...
1
vote
0answers
120 views
Tool for Harmonic Analysis & Synthesis
I've been using a program for identifying harmonics for a wave after doing a fourier analysis.
http://www.phon.ucl.ac.uk/resource/sfs/esynth.htm
I would like to be able to tweak some of the ...
4
votes
2answers
220 views
Peak location estimation for a triangle wave in AGWN?
Is there a more optimal peak location estimator specifically for triangle waves in AGWN, compared with peak estimation for generic waveforms?
For a "smooth" waveform in noise, a common peak locator ...
9
votes
4answers
749 views
Is up-sampling prior to cross-correlation useless?
Consider a simple case where two signals from two different sensors are cross-correlated, and the time-delay-of-arrival computed from the absissa of the peak of their cross-correlation function.
Now ...
3
votes
4answers
431 views
Auto correlation correspondence to original time domain window
I'm trying to figure out how exactly an auto correlation corresponds to a time domain signal.
Now I'm trying to find pitch periods in an audio file and 99% of the time I'm getting it spot on. ...
6
votes
2answers
693 views
Real-Time Human Pitch Detection
I'm trying to implement a singing game that will analise raw mic input and tell the player how good is he singing. That needs to be done in real-time.
I've come across a lot of threads asking the ...
7
votes
1answer
460 views
How do I use a Savitzky Golay filter to find local maxima (in between samples) in a discretely sampled 1D signal?
I have a seismic signal y(i):
Here I have found one maximum: i=152.54, y=222.29 manually and plotted it in red.
I want to find all maxima automatically.
I read that the Savitzky Golay Filter (SGF) ...
6
votes
2answers
424 views
Finding local peaks in-between samples
I have n discrete samples of a seismic signal y[n]:
I want to find local maxima in the signal.
A naive test for if y[n] is a maximum would be:
y[n]: maxima if y[n] > y[n-1] and y[n] > y[n+1].
...
13
votes
4answers
2k views
Peak detection approach
What are the peak detection algorithms in existence? I have noisy data, and I would like to implement peak detection for this data. Data is in reverse, actually I am trying to determine the bottom.
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6
votes
0answers
439 views
Derivative calculation
I have a series of data (single array). If I take this data and plot it, I can see that there are multiple peaks. However If I zoom in to a section of data, I see that there is substantial noise.
I ...
